**Label** | **ID** | **Definition** | **English** | **Metric** |

ABEL8K | 74 | Drainage Area below 8000ft | square miles | km2 |

ABURN | 2863 | Total area burned within delineated basin | square miles | km2 |

ACARBON | 40 | Area underlain by carbonate rock | square miles | km2 |

ACHSWAMP | 53 | Main Channel Swamp | square miles | km2 |

ACLAY | 49 | Area underlain by lacustrine clay and silt | square miles | km2 |

ACRSDFT | 41 | Area underlain by stratified drift | square miles | km2 |

ACRSTILL | 42 | Area underlain by coarse-textured glacial till | square miles | km2 |

ACTIVE | 1217 | Station is currently active | Yes or No | Yes or No |

ADETEN | 50 | Lake and Detention Basin Area | square miles | km2 |

ADEVNLCD01 | 1227 | Total area of land-use classifications 21-24 from NLCD 2001 | square miles | km2 |

ADJCOEFF | 2320 | Coefficient to adjust estimates for percentage of carbonate rock in Western Maryland | dimensionless | dimensionless |

AFINMOR | 43 | Area underlain by end moraines of fine-textured till | square miles | km2 |

AFOREST | 44 | Area covered by forest | square miles | km2 |

AGENCY_CD | 173 | USGS NWIS Agency code for Station | dimensionless | dimensionless |

AGLACIER | 45 | Area covered by glaciers | square miles | km2 |

AGMD97 | 2240 | Percent area of agricultural land use from Maryland Dept of Planning 1997 land-use data | percent | percent |

AG_OF_DA | 1797 | Agricultural Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035 | percent | percent |

AIMPERV | 48 | Impervious area | square miles | km2 |

AISOLAKE | 2920 | Area of basin that is isolated lakes and ponds that are not connected to the stream network, from 1:24,000 scale DRG data | square miles | km2 |

AISOLAKEDA | 2921 | Area that drains to and includes isolated lakes and ponds from 1:24K DRGs | square miles | km2 |

ALAKE | 51 | Area of Lakes and Ponds | square miles | km2 |

ALIME | 52 | Area underlain by limestone geology | square miles | km2 |

ALTIND | 1179 | Altitude Index | thousand feet | kilometer |

ALVM | 3727 | Percentage of the basin covered by Quaternary alluvial deposits from Reed & Bush (2005) | percent | percent |

AMEDTILL | 134 | Area underlain by medium-textured glacial till | square miles | km2 |

AMUCK | 55 | Area underlain by peat and muck | square miles | km2 |

AOS | 1439 | Average Maximum Overland Slope | percent | percent |

AOUTWASH | 54 | Area underlain by outwash | square miles | km2 |

APRAVPRE | 99 | Mean April Precipitation | inches | mm |

APRAVTMP | 100 | Mean April Temperature | degrees F | degrees C |

ARBEL8K | 39 | Drainage Area below 8000ft | square miles | km2 |

ASANDGRAV | 2672 | Area of land surface underlain by sand and gravel deposits | square miles | km2 |

ASOILA | 46 | Area underlain by hydrologic soil type A | square miles | km2 |

ASOILD | 47 | Area underlain by hydrologic soil type D | square miles | km2 |

ASPECT | 2913 | Basin average of topographic slope compass directions from elevation grid | degrees | degrees |

ASTORAGE | 56 | Area of Storage (lakes - ponds - and wetlands ) | square miles | km2 |

ATILL | 2673 | Surface area covered by till deposits | square miles | km2 |

ATILROCK | 57 | Area underlain by thin glacial till over bedrock | square miles | km2 |

AUGAVPRE | 101 | Mean August Precipitation | inches | mm |

AUGAVTMP | 102 | Mean August Temperature | degrees F | degrees C |

AURBAN | 58 | Area covered by urban land use | square miles | km2 |

AVMXSS | 1185 | Average Maximum Soil Slope | percent | percent |

AWETLAND | 59 | Area of Wetlands | square miles | km2 |

AWETSG | 2675 | Area of lakes and wetlands underlain by sand and gravel deposits | square miles | km2 |

AZ_HIPERMA | 2316 | Percent basin surface area containing high permeability aquifer units as defined for Arizona in SIR 2014-5211 | percent | percent |

AZ_HIPERMG | 2317 | Percent basin surface area containing high permeability geologic units as defined for Arizona in SIR 2014-5211 | percent | percent |

AZIMUTH | 64 | Decimal degrees from north of a straight line connecting the points 10- and 85-percent of distance along main stream channel | decimal degrees | decimal degrees |

BASELNDPTH | 1850 | Depth of the 50-percent flow duration in feet above the zero-flow point. | feet | m |

BASIN | 10 | Local code of major drainage basin in which the station is located | dimensionless | dimensionless |

BASINPERIM | 1778 | Perimeter of the drainage basin as defined in SIR 2004-5262 | miles | km |

BASLENAH | 1361 | Basin length from outlet to basin divide determined using the method in the ArcHydro Toolset | miles | km |

BASLENRAW | 2842 | Basin length computed by ArcHydro method, unadjusted for bias | miles | km |

BASSTRMORD | 1762 | Strahler stream order of the main channel at the basin outlet | dimensionless | dimensionless |

BASWIDTH | 2360 | Effective basin width computed as drainage area (DRNAREA) divided by basin length (BASLENAH) | miles | km |

BDF | 66 | Urbanization index described by Sauer and others (1981) - Also called Urbanization Index in Texas | dimensionless | dimensionless |

BEGIN_REC | 1208 | First day of record | days | days |

BFREG | 2511 | Bankfull-flow region code | dimensionless | dimensionless |

BRMETA | 2448 | Percent area of metamorphic rocks within the Blue Ridge Physiographic Region | percent | percent |

BSHAPE | 106 | Basin Shape Factor for Area | dimensionless | dimensionless |

BSHAPELFP | 3725 | Basin Shape Factor computed as the square of the longest flow path divided by drainage area | dimensionless | dimensionless |

BSLDEM10ff | 1399 | Mean basin slope computed from 10 m DEM in feet per foot | feet per foot | m per m |

BSLDEM10M | 1201 | Mean basin slope computed from 10 m DEM | percent | percent |

BSLDEM250 | 1199 | Mean basin slope computed from 1:250K DEM | percent | percent |

BSLDEM30ff | 2384 | Mean basin slope computed from 30 m DEM in feet per foot | feet per foot | m per m |

BSLDEM30FT | 2864 | Mean basin slope, based on slope percent grid from DEM with 30 foot pixels | percent | percent |

BSLDEM30M | 1200 | Mean basin slope computed from 30 m DEM | percent | percent |

BSLOPCM | 105 | Mean basin slope determined by summing lengths of all contours in basin mulitplying by contour interval and dividing product by drainage area | feet per mi | m per km |

BSLOPD | 1222 | Mean basin slope measured in degrees | degrees | degrees |

BSLOPDRAW | 2867 | Mean basin slope, in degrees, raw value unadjusted for bias | degrees | degrees |

BSLOPGM | 104 | Mean basin slope determined using the grid-sampling method | feet per foot | m per m |

BURBNHI | 2861 | Percent of basin burned at high severity | percent | percent |

BURNMOD | 2860 | Percent of basin burned at moderate severity | percent | percent |

BURNSLP30 | 2862 | Pâ€‹ercent of the entire basin area with slopes GE30 percent and burned at high, mod and low severity | percent | percent |

CANOPY_PCT | 1865 | Percentage of drainage area covered by canopy as described in OK SIR 2009_5267 | percent | percent |

CARBADJUST | 1286 | Binary variable for Western Maryland low-flow equations equals 1 if CARBON greater than 40 percent and zero otherwise | dimensionless | dimensionless |

CARBON | 137 | Percentage of area of carbonate rock | percent | percent |

CB01BARE | 2471 | Percent barren from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01CRPHAY | 2467 | Percent cultivated crops and hay from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01DEV | 2465 | Percent developed from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01FORSHB | 2466 | Percent forests and shrub lands from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01HERB | 2468 | Percent herbaceous from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01WATER | 2469 | Percent open water from 2001 Chesapeake Bay land cover dataset | percent | percent |

CB01WETLND | 2470 | Percent wetlands 2001 Chesapeake Bay land cover dataset | percent | percent |

CB06BARE | 2478 | Percent barren from 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06CRPHAY | 2474 | Percent cultivated crops and hay from 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06DEV | 2472 | Percent developed 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06FORSHB | 2473 | Percent forests and shrub lands from 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06HERB | 2475 | Percent herbaceous from 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06WATER | 2476 | Percent water from 2006 Chesapeake Bay land cover dataset | percent | percent |

CB06WETLND | 2477 | Percent wetlands from 2006 Chesapeake Bay land cover dataset | percent | percent |

CCM | 1757 | Constant of channel maintenance computed as drainage area divided by total stream length | square mile per mile | km2 per km |

CELVBLUE | 62 | Average of outlet elevation and the elevation at the upstream extent of the mapped stream | feet | m |

CELVMEAN | 131 | Mean elevation along the main channel | feet | m |

CENTROIDX | 2166 | Basin centroid horizontal (x) location in state plane coordinates | State plane coordinates | State plane coordinates |

CENTROIDY | 2167 | Basin centroid vertical (y) location in state plane units | State plane coordinates | State plane coordinates |

CENTROXA83 | 2502 | Basin centroid horizontal (x) location in NAD 1983 Albers | NAD 1983 Albers | NAD 1983 Albers |

CENTROXRI | 2367 | Basin centroid horizontal (x) location in Rhode Island state plane coordinates | State plane coordinates | State plane coordinates |

CENTROYA83 | 2503 | Basin centroid horizontal (y) location in NAD 1983 Albers | NAD 1983 Albers | NAD 1983 Albers |

CENTROYRI | 2368 | Basin centroid vertical (y) location in Rhode Island state plane coordinates | State plane coordinates | State plane coordinates |

CENTRXA83M | 2916 | Basin centroid horizontal (x) location in NAD 1983 Albers | NAD 1983 Albers meters | NAD 1983 Albers meters |

CENTRYA83M | 2917 | Basin centroid horizontal (y) location in NAD 1983 Albers | NAD 1983 Albers meters | NAD 1983 Albers meters |

CF | 68 | Climate factor for area | dimensionless | dimensionless |

CH92_01DEV | 2315 | Percent Difference between 1992 and 2001 area covered by developed land using NLCD | percent | percent |

CH92_01FOR | 2314 | Percent Difference between 1992 and 2001 area covered by forest using NLCD | percent | percent |

CHANCOND | 61 | Condition between points 100- 75- 50- and 25-percent along main channel - 2 if entirely paved - 1 if unpaved | dimensionless | dimensionless |

CHSWAMP | 151 | Percentage of area of main channel swamps | percent | percent |

CIRC_RATIO | 1428 | Circularity Ratio | dimensionless | dimensionless |

CLENBLUE | 88 | Length of main channel shown as blue line on a topographic map | miles | km |

CLIFAC100Y | 2912 | 100-year climate factor from Litchy and Karlinger (1990) | dimensionless | dimensionless |

CLIFAC25Y | 2911 | 25-year climate factor from Litchy and Karlinger (1990) | dimensionless | dimensionless |

CLIMFAC2YR | 2066 | Two-year climate factor from Litchy and Karlinger (1990) | dimensionless | dimensionless |

COASTDIST | 1292 | Shortest distance from the coastline to the basin centroid | miles | km |

COMMD97 | 2241 | Percent area of commercial land use from Maryland Dept of Planning 1997 land-use data | percent | percent |

COMPRAT | 69 | A measure of basin shape related to basin perimeter and drainage area | dimensionless | dimensionless |

CONIF | 1304 | Percentaqe of land surface covered by coniferous forest | percent | percent |

CONTDA | 70 | Area that contributes flow to a point on a stream (total drainage area minus non-contributing areas within basin) | square miles | km2 |

CONTOUR | 2900 | Total length of all elevation contours in drainage area from 1:24K mapping | miles | km |

CONTROL | 140 | Percent of basin controlled by lakes swamps and reservoirs | percent | percent |

CONTROLLED | 1578 | Percent of basin controlled by lakes swamps and reservoirs - see WRIR 00 4189 | percent | percent |

CONVEY | 65 | Conveyance of main stream channel at bank-full conditions | cubic feet per second | m3 per second |

COUNTY | 11 | County code | dimensionless | dimensionless |

CPSED | 2449 | Percent area of sedimentary rockswithin the Coastal Plain Physiographic Region | percent | percent |

CROPS | 2642 | Percent of basin area covered by agricultural land | percent | percent |

CRSDFT | 138 | Percentage of area of coarse-grained stratified drift | percent | percent |

CRSTILL | 139 | Percentage of area of coarse till | percent | percent |

CSL10_85 | 166 | Change in elevation divided by length between points 10 and 85 percent of distance along main channel to basin divide - main channel method not known | feet per mi | m per km |

CSL10_85fm | 1358 | Change in elevation between points 10 and 85 percent of length along main channel to basin divide divided by length between points ft per mi | feet per mi | m per km |

CSL1085LFP | 1574 | Change in elevation divided by length between points 10 and 85 percent of distance along the longest flow path to the basin divide, LFP from 2D grid | feet per mi | m per km |

CSL1085LO | 2093 | Change in elevation between points 10 and 85 percent of length along the lower half of the longest flow path divided by length between the points | feet per mi | m per km |

CSL1085RAW | 2841 | Main channel slope computed by the 10 and 85 method, unadjusted for bias | feet per mi | m per km |

CSL1085UP | 2094 | Change in elevation between points 10 and 85 percent of length along the upper half of the longest flow path divided by length between the points | feet per mi | m per km |

CSLArc10 | 1224 | Average stream slope determined using ArcHydro Tools and 10 meter DEM - computes average of slopes from all elevation grid cells along the blue line | feet per mi | m per km |

CSLBlue | 167 | Change in elevation of the longest blue-line stream (not extended to the boundary) divided by stream length | feet per mi | m per km |

CSLBlue_ff | 2078 | Change in elevation of the longest blue-line stream divided by stream length | feet per foot | m per m |

DA1000 | 1268 | Drainage area divided by 1000 | square miles | km2 |

DACTCH | 2946 | Average depth of the active channel of a stream | feet | m |

DAMREG | 2948 | Percent of contributing drainage area that is regulated by upstream dams | percent | percent |

DATUM | 22 | Datum used to determine the site coordinates | dimensionless | dimensionless |

DAUNREG | 1346 | Unregulated drainage area used in OK regulated equations | square miles | km2 |

DBANKFULL | 2947 | Average depth of a stream at bankfull level | feet | m |

DECAVPRE | 129 | Mean December Precipitation | inches | mm |

DECAVTMP | 130 | Mean December Temperature | degrees F | degrees C |

DESMOIN | 72 | Area underlain by Des Moines Lobe | percent | percent |

DETEN | 148 | Percentage of area of lakes and detention basins | percent | percent |

DEVNLCD01 | 1228 | Percentage of land-use categories 21-24 from NLCD 2001 | percent | percent |

DEVNLCD92 | 2605 | Percentage of developed land-use categories 21-23 from NLCD 1992 | percent | percent |

DINTNLCD01 | 1229 | Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2001 | percent | percent |

DIRECT | 13 | Directions | dimensionless | dimensionless |

DISTANCE | 0 | Distance from Ungaged Station | miles | km |

DISTRICT | 24 | Code of the state where the station is located. | dimensionless | dimensionless |

DMARMAXTMP | 136 | Normal Daily Maximum March Temperature | degrees F | degrees C |

DRAININD | 2943 | Drainage index from STATSGO soil properties computed as in SIR 2014-5177 | dimensionless | dimensionless |

DRFTPERSTR | 165 | Area of stratified drift per unit of stream length | square mile per mile | km2 per km |

DRN | 2165 | Drainage quality (1=well drained to 7=poorly drained) from dataset at http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml | dimensionless | dimensionless |

DRNAREA | 73 | Area that drains to a point on a stream | square miles | km2 |

DRNDENSITY | 1804 | Basin drainage density defined as total stream length divided by drainage area. | miles per square mile | km per km2 |

DRNFREQ | 75 | Number of first order streams per square mile of drainage area | 1st-order streams per square mile | 1st-order streams per km2 |

DURREG | 17 | Flow-Duration Hydrologic Region code | dimensionless | dimensionless |

DV_OF_DA | 1796 | Developed Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035 | percent | percent |

EFFECTDA | 76 | Total drainage area minus area upstream from erosion-control and flood-retention structures | square miles | km2 |

EL1200 | 1184 | Percentage of basin at or above 1200 ft elevation | percent | percent |

EL2000 | 2247 | Percent of basin area that is above 2000 feet elevation | percent | percent |

EL5000 | 78 | Percent of area above 5000 ft | percent | percent |

EL5500 | 3282 | Percent of area above 5500 ft | feet | m |

EL6000 | 79 | Percent of area above 6000 ft | percent | percent |

EL6500 | 3283 | Percent of area above 6500 ft | feet | m |

EL7000 | 2309 | Percent of area above 7000 ft | feet | m |

EL7500 | 1350 | Percent of area above 7500 ft | percent | percent |

ELEV | 103 | Mean Basin Elevation | feet | m |

ELEV1000 | 1188 | Elevation in Thousands | thousand feet | kilometer |

ELEV10FT | 1900 | Elevation at 10 percent from outlet along longest flow path slope using DEM | feet | m |

ELEV10FT3D | 1901 | Elevation at 10 percent from outlet along longest flow path slope using 3D line | feet | m |

ELEV85FT | 1902 | Elevation at 85 percent from outlet along longest flow path slope using DEM | feet | m |

ELEV85FT3D | 1903 | Elevation at 85 percent from outlet along longest flow path slope using 3D line | feet | m |

ELEVMAX | 93 | Maximum basin elevation | feet | m |

ELONGRATIO | 1751 | Elongation Ratio | dimensionless | dimensionless |

ELV10_85 | 77 | Average of channel elevations at points 10- and 85- percent above gage - Equivalent to Altitude Index | feet | m |

END_REC | 1209 | Last day of record | days | days |

ET0306MOD | 2590 | Spring (March-June) mean monthly evapotranspiration (2001-2011), MODIS | inches | mm |

ET0710MOD | 2591 | Summer (July-October) mean monthly evapotranspiration (2001-2011), MODIS | inches | mm |

EVAP | 94 | Mean Annual Lake Evaporation | inches | mm |

EVAPAN | 95 | Mean Annual Pan Evaporation | inches | mm |

FEBAVPRE | 110 | Mean February Precipitation | inches | mm |

FEBAVTMP | 111 | Mean February Temperature | degrees F | degrees C |

FINMOR | 141 | Percentage of area of end moraine fine till | percent | percent |

FIRSTYEAR | 1359 | Year in which record was first collected or used for analysis | years | years |

FLC11DVLMH | 2922 | Fraction of land-use from NLCD 2011 classes 22-24 low to high developed | decimal fraction | decimal fraction |

FOREST | 142 | Percentage of area covered by forest | percent | percent |

FOREST_MD | 2229 | Percent forest from Maryland 2010 land-use data | percent | percent |

FORESTp1 | 1189 | Percent Forest plus 1 (ID ROI Parm) | percent | percent |

FORMD97 | 2243 | Percent area of forest from Maryland Dept of Planning 1997 land-use data | percent | percent |

FORWET | 2644 | Percentage of land covered by forested wetlands - source not specified | percent | percent |

FOSTREAM | 1761 | Number of first order streams determined using the Strahler stream ordering system | dimensionless | dimensionless |

FROST | 112 | Mean frost depth on February 28 | inches | mm |

FSSURGDC78 | 2925 | Fraction of land area that is in drainage classes 7 and 8 from SSURGO very poorly drained and unknown likely water | decimal fraction | decimal fraction |

GA_PKREG1 | 2480 | Georgia Peak Flow Region 1 from SIR 2009-5043 | dimensionless | dimensionless |

GA_PKREG2 | 2481 | Georgia Peak Flow Region 2 from SIR 2009-5043 | dimensionless | dimensionless |

GA_PKREG3 | 2482 | Georgia Peak Flow Region 3 from SIR 2009-5043 | dimensionless | dimensionless |

GA_PKREG4 | 2483 | Georgia Peak Flow Region 4 from SIR 2009-5043 | dimensionless | dimensionless |

GA_PKREG5 | 2484 | Georgia Peak Flow Region 5 from SIR 2009-5043 | dimensionless | dimensionless |

GENRO | 80 | Generalized mean annual runoff in Minnesota 1951-85 | inches | mm |

GEOFACTVT | 1400 | Northing of the centroid of the drainage basin in the Vermont State Plane coordinate system divided by 100000 then increased by 1 | dimensionless | dimensionless |

GEOFACTWY | 81 | Geographic factor for Wyoming from plate 1 of Lohman (1988) | dimensionless | dimensionless |

GLACIATED | 1573 | Percentage of basin area that was historically covered by glaciers | percent | percent |

GLACIER | 143 | Percentage of area of Glaciers | percent | percent |

GRUN | 2877 | Mean annual groundwater runoff | inches | mm |

GRUN0711 | 2878 | Mean annual dry season groundwater runoff, July through November | inches | mm |

GRUN1206 | 2879 | Mean annual wet season groundwater runoff, December through June | inches | mm |

GUTTER | 83 | Length of gutters per square mile of drainage area | miles per square mile | km per km2 |

GWHEAD | 82 | Mean - minimum basin elevation | feet | m |

HCDN2009 | 175 | Station is part of the 2009 Hydro-Climatic Data Network (http://water.usgs.gov/GIS/metadata/usgswrd/XML/gagesII_Sept2011.xml) when 'Yes', else â€˜No' | Yes or No | Yes or No |

HIELONGRAT | 1793 | Ratio of (1)diameter of circle with equal area as basin to (2)basin length, as defined in SIR 2004-5262 | dimensionless | dimensionless |

HIGHEQU | 19 | Indicates whether the site was used to develop high-flow regression equations | Yes or No | Yes or No |

HIGHREG | 15 | High-Flow Hydrologic Region code | dimensionless | dimensionless |

HIMARRATE | 1794 | Mean annual rainfall rate determined based on the method described in SIR 2004-5262 | cubic feet per second | m3 per second |

HIRAINRATE | 1750 | Maximum Weighted Rainfall Rate | cubic feet per second | m3 per second |

HOMDEN2000 | 1355 | Housing density from 2000 census data | homes per acre | homes per km2 |

HOMDENCYR | 1354 | Housing density for centroid year of streamflow data collection | homes per acre | homes per km2 |

HOMEDENS | 1348 | Average homes per acre in watershed | homes per acre | homes per km2 |

HUC | 9 | Hydrologic Unit Number | dimensionless | dimensionless |

HYPSO | 2238 | Single-valued index equal to the ratio of the area under the normalized hypsometric curve | dimensionless | dimensionless |

I24H100Y | 33 | Maximum 24-hour precipitation that occurs on average once in 100 years | inches | mm |

I24H10Y | 30 | Maximum 24-hour precipitation that occurs on average once in 10 years | inches | mm |

I24H200Y | 2898 | Maximum 24-hour precipitation that occurs on average once in 200 years | inches | mm |

I24H25Y | 31 | Maximum 24-hour precipitation that occurs on average once in 25 years | inches | mm |

I24H2Y | 29 | Maximum 24-hour precipitation that occurs on average once in 2 years - Equivalent to precitation intensity index | inches | mm |

I24H500Y | 1931 | Maximum 24-hour precipitation that occurs on average once in 500 years | inches | mm |

I24H50Y | 32 | Maximum 24-hour precipitation that occurs on average once in 50 years | inches | mm |

I24H5Y | 1930 | Maximum 24-hour precipitation that occurs on average once in 5 years | inches | mm |

I24MAX | 28 | Maximum 24-hour precipitation for period of record | inches | mm |

I2H2Y | 35 | Maximum 2-hour precipitation that occurs on average once in 2 years | inches | mm |

I48H100Y | 1935 | Maximum 48-hour precipitation that occurs on average once in 100 years | inches | mm |

I48H10Y | 1932 | Maximum 48-hour precipitation that occurs on average once in 10 years | inches | mm |

I48H25Y | 1933 | Maximum 48-hour precipitation that occurs on average once in 25 years | inches | mm |

I48H2Y | 1885 | Maximum 48-hour precipitation that occurs on average once in 2 years | inches | mm |

I48H500Y | 1936 | Maximum 48-hour precipitation that occurs on average once in 500 years | inches | mm |

I48H50Y | 1934 | Maximum 48-hour precipitation that occurs on average once in 50 years | inches | mm |

I48H5Y | 1886 | Maximum 48-hour precipitation that occurs on average once in 5 years | inches | mm |

I60M100Y | 1922 | Maximum 60-min precipitation that occurs on average once in 100 years | inches | mm |

I60M10Y | 1919 | Maximum 60-min precipitation that occurs on average once in 10 years | inches | mm |

I60M25Y | 1920 | Maximum 60-min precipitation that occurs on average once in 25 years | inches | mm |

I60M2Y | 1917 | Maximum 60-min precipitation that occurs on average once in 2 years | inches | mm |

I60M500Y | 1923 | Maximum 60-min precipitation that occurs on average once in 500 years | inches | mm |

I60M50Y | 1921 | Maximum 60-min precipitation that occurs on average once in 50 years | inches | mm |

I60M5Y | 1918 | Maximum 60-min precipitation that occurs on average once in 5 years | inches | mm |

I6H100Y | 1856 | 6-hour precipitation that is expected to occur on average once in 100 years | inches | mm |

I6H10Y | 1926 | Maximum 6-hour precipitation that occurs on average once in 10 years | inches | mm |

I6H25Y | 1927 | Maximum 6-hour precipitation that occurs on average once in 25 years | inches | mm |

I6H2Y | 1924 | Maximum 6-hour precipitation that occurs on average once in 2 years | inches | mm |

I6H500Y | 1929 | Maximum 6-hour precipitation that occurs on average once in 500 years | inches | mm |

I6H50Y | 1928 | Maximum 6-hour precipitation that occurs on average once in 50 years | inches | mm |

I6H5Y | 1925 | Maximum 6-hour precipitation that occurs on average once in 5 years | inches | mm |

ILREG1 | 1261 | Indicator variable for IL region 1, enter 1 if site is in region 1 else 0 | dimensionless | dimensionless |

ILREG3 | 1262 | Indicator variable for IL region 3, enter 1 if site is in region 3 else 0 | dimensionless | dimensionless |

ILREG5 | 1263 | Indicator variable for IL region 5, enter 1 if site is in region 5 else 0 | dimensionless | dimensionless |

ILREG6 | 1288 | Indicator variable for IL region 6, enter 1 if site is in region 6 else 0 | dimensionless | dimensionless |

ILREG7 | 1289 | Indicator variable for IL region 7, enter 1 if site is in region 7 else 0 | dimensionless | dimensionless |

IMPERV | 146 | Percentage of impervious area | percent | percent |

IMPERVNOAA | 2857 | NOAA 1 km Sprawl impervious surfaces grid http://ngdc.noaa.gov/eog/others/download_sprawl.html | percent | percent |

IMPMD97 | 2245 | Percent area of impervious surfaces from Maryland Dept of Planning 1997 land-use data | percent | percent |

IMPNLCD01 | 1226 | Average percentage of impervious area determined from NLCD 2001 impervious dataset | percent | percent |

IRRIGAT_MT | 2904 | Percent of basin that is irrigated based on Montana Final Land Unit (FLU) classification | percent | percent |

ISOLAKE | 2479 | Percentage of basin that is isolated lakes and ponds that are not connected to the stream network, from 1:24,000 scale DRG data | percent | percent |

ISOLAKEDA | 2512 | Percent of the drainage area that drains to and includes isolated lakes and ponds from 1:24K DRGs | percent | percent |

JANAVPRE | 107 | Mean January Precipitation | inches | mm |

JANAVTMP | 108 | Mean January Temperature | degrees F | degrees C |

JANMAXPRE | 2858 | Average maximum January Temperature from 2KM resolution PRISM, 30-year average daily (1961-1990) http://www.climatesource.com/ | inches | mm |

JANMAXT2K | 2895 | Mean Maximum January Temperature from 2K resolution PRISM 1961-1990 data | degrees F | degrees C |

JANMAXTMP | 1259 | Mean Maximum January Temperature | degrees F | degrees C |

JANMINPRE | 2859 | Average minimum January Temperature from 2KM resolution PRISM, 30-year average daily (1961-1990) http://www.climatesource.com/ | inches | mm |

JANMINT2K | 2896 | Mean Minimum January Temperature from 2K resolution PRISM 1961-1990 data | degrees F | degrees C |

JANMINTMP | 109 | Mean Minimum January Temperature | degrees F | degrees C |

JULAVPRE | 120 | Mean July Precipitation | inches | mm |

JULYAVEPRE | 1864 | Mean July Precipitation | dimensionless | dimensionless |

JULYAVTMP | 121 | Mean July Temperature | degrees F | degrees C |

JULYMAXTMP | 122 | Mean Maximum July Temperature | degrees F | degrees C |

JULYMINTMP | 1260 | Mean Minumum July Temperature | degrees F | degrees C |

JUNAVPRE | 118 | Mean June Precipitation | inches | mm |

JUNEAVPRE | 1863 | Mean June Precipitation | dimensionless | dimensionless |

JUNEAVTMP | 119 | Mean June Temperature | degrees F | degrees C |

JUNMAXTMP | 2871 | Mean Maximum June Temperature | degrees F | degrees C |

KYVARIND10 | 2505 | Mapped streamflow-variability index as defined in SIR 2010-5217 | dimensionless | dimensionless |

KYVARIND93 | 2504 | Mapped streamflow variability index as defined in WRIR 92-4173 | dimensionless | dimensionless |

LAGFACTOR | 1771 | Lag Factor as defined in SIR 2006-5112 | dimensionless | dimensionless |

LAKEAREA | 149 | Percentage of Lakes and Ponds | percent | percent |

LAKESNHDH | 2905 | Percent of basin in lakes, ponds, and reservoirs fom high resolution National Hydrography Dataset | percent | percent |

LAKESNWI | 2845 | Percentage of lakes and ponds as determined from the National Wetlands Inventory (2001) | percent | percent |

LAKESp1 | 1192 | Percent Lakes plus 1 (MN ROI Parm) | percent | percent |

LASTYEAR | 1360 | Year in which record was last collected or used for analysis | years | years |

LAT_CENT | 84 | Latitude of Basin Centroid | decimal degrees | decimal degrees |

LAT_GAGE | 7 | Latitude | decimal degrees | decimal degrees |

LAT_NHD | 1207 | Latitude of station location on National Hydrography Dataset | degrees | degrees |

LAT_OUT | 1197 | Latitude of Basin Outlet | degrees | degrees |

LC01AIMP | 1225 | Impervious area determined from NLCD 2001 impervious dataset | square miles | km2 |

LC01BARE | 1911 | Percentage of area barren land, NLCD 2001 category 31 | percent | percent |

LC01CROP | 1913 | Percentage of area cultivated crops, NLCD 2001 category 82 | percent | percent |

LC01CRPHAY | 2454 | Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2001 | percent | percent |

LC01DEV | 2856 | Percentage of land-use from NLCD 2001 classes 21-24 | percent | percent |

LC01DEVHI | 1910 | Percentage of area developed, high intensity, NLCD 2001 category 24 | percent | percent |

LC01DEVMD | 1909 | Percentage of area developed, medium intensity, NLCD 2001 category 23 | percent | percent |

LC01EVERG | 1912 | Percentage of area evergreen forest, NLCD 2001 category 42 | percent | percent |

LC01FOREST | 2310 | Percentage of forest from NLCD 2001 classes 41-43 | percent | percent |

LC01FORSHB | 2455 | Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2001 | percent | percent |

LC01HERB | 2311 | Percentage of herbaceous upland from NLCD 2001 class 71 | percent | percent |

LC01IMP | 2458 | Average percentage of impervious land cover from NLCD 2001 | percent | percent |

LC01OPNLO | 1908 | Percentage of area developed, open space and low intensity combined, NLCD2001 cat. 21 and 22 | percent | percent |

LC01SHRUB | 2868 | Percentage of shrub scrub from NLCD 2001 class 52 | percent | percent |

LC01WATER | 2456 | Percentage of open water, class 11, from NLCD 2001 | percent | percent |

LC01WETLND | 2457 | Percentage of wetlands, classes 90 and 95, from NLCD 2001 | percent | percent |

LC06ABARE | 2290 | Area of barren from NLCD 2006 class 31 | square miles | km2 |

LC06ACROP | 2304 | Area of area of cultivated crops from NLCD 2006 class 82 | square miles | km2 |

LC06ADECID | 2291 | Area of deciduous forest from NLCD 2006 class 41 | square miles | km2 |

LC06ADEV | 2284 | Area of developed land-use from NLCD 2006 classes 21-24 | square miles | km2 |

LC06ADEVHI | 2288 | Area of developed land, high intensity, NLCD 2006 class 24 | square miles | km2 |

LC06ADEVLO | 2286 | Area of developed land, low intensity, from NLCD 2006 class 22 | square miles | km2 |

LC06ADEVMD | 2287 | Area of developed land, medium intensity, NLCD 2006 class 23 | square miles | km2 |

LC06ADVOPN | 2285 | Area of developed open land from NLCD 2006 class 21 | square miles | km2 |

LC06ADWARF | 2295 | Area of dwarf scrub from NLCD 2006 class 51 | square miles | km2 |

LC06AEMWET | 2307 | Area of area of emergent herbaceous wetlands from NLCD 2006 class 95 | square miles | km2 |

LC06AEVERG | 2292 | Area of evergreen forest from NLCD 2006 class 42 | square miles | km2 |

LC06AFORES | 2294 | Area of forest from NLCD 2006 classes 41-43 | square miles | km2 |

LC06AGRASS | 2298 | Area of grassland from NLCD 2006 class 71 | square miles | km2 |

LC06AGRI | 2366 | Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82 | percent | percent |

LC06AHERB | 2302 | Area of herbaceous from NLCD 2006 classes 71-74 | square miles | km2 |

LC06AIMP | 2279 | Area of impervious land surface determined from NLCD 2006 impervious dataset | square miles | km2 |

LC06ALICHN | 2300 | Area of lichens from NLCD 2006 class 73 | square miles | km2 |

LC06ALTFOR | 2364 | Percentage of forested land area from NLCD2006 classes 22, 41-43 and 90 | percent | percent |

LC06AMOSS | 2301 | Area of moss from NLCD 2006 class 74 | square miles | km2 |

LC06AMXFOR | 2293 | Area of mixed deciduous and evergreen forest from NLCD 2006 class 43 | square miles | km2 |

LC06AOPNLO | 2289 | Area of developed land, open space and low intensity combined, NLCD2006 classes 21 and 22 | square miles | km2 |

LC06APAST | 2303 | Area of area of pasture area from NLCD 2006 class 81 | square miles | km2 |

LC06APLANT | 2305 | Area of planted area from NLCD 2006 classes 81 and 82 | square miles | km2 |

LC06ASCRUB | 2297 | Area of scrub from NLCD 2006 classes 51 and 52 | square miles | km2 |

LC06ASEDGE | 2299 | Area of sedge from NLCD 2006 class 72 | square miles | km2 |

LC06ASHRUB | 2296 | Area of shrub scrub from NLCD 2006 class 52 | square miles | km2 |

LC06ASNOIC | 2283 | Area of snow and ice from NLCD 2006 class 12 | square miles | km2 |

LC06ASTOR | 2282 | Area of water bodies and wetlands determined from the NLCD 2006 classes 11, 90 and 95 | square miles | km2 |

LC06AWATER | 2280 | Area of water from NLCD 2006 class 11 | square miles | km2 |

LC06AWATWT | 2281 | Area open water and herbaceous wetland from NLCD 2006 classes 11 and 95 | square miles | km2 |

LC06AWDWET | 2306 | Area of area of wooded wetlands from NLCD 2006 class 90 | square miles | km2 |

LC06AWETL | 2308 | Area of wetlands from NLCD 2006 classes 90 and 95 | square miles | km2 |

LC06BARE | 2260 | Percentage of barren from NLCD 2006 class 31 | percent | percent |

LC06BARSCB | 2365 | Percentage of barren and scrub land from NLCD classes 31, 51, and 52 | percent | percent |

LC06CROP | 2274 | Percentage of area of cultivated crops from NLCD 2006 class 82 | percent | percent |

LC06CRPHAY | 2459 | Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2006 | percent | percent |

LC06DECID | 2261 | Percentage of deciduous forest from NLCD 2006 class 41 | percent | percent |

LC06DEV | 2253 | Percentage of land-use from NLCD 2006 classes 21-24 | percent | percent |

LC06DEVHI | 2255 | Percentage of area developed, high intensity, NLCD 2006 class 24 | percent | percent |

LC06DINT | 2259 | Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2006 | percent | percent |

LC06DVLO | 2254 | Percentage of developed area, low intensity, from NLCD 2006 class 22 | percent | percent |

LC06DVLOMD | 2872 | Percentage of developed area, low and medium intensity, from NLCD 2006 classes 22 and 23 | percent | percent |

LC06DVMD | 2256 | Percentage of area developed, medium intensity, NLCD 2006 class 23 | percent | percent |

LC06DVMDHI | 2363 | Percentage of area developed, medium and high intensity, NLCD 2006 classes 23 and 24 | percent | percent |

LC06DVOPN | 2257 | Percentage of developed open area from NLCD 2006 class 21 | percent | percent |

LC06DWARF | 2265 | Percentage of dwarf scrub from NLCD 2006 class 51 | percent | percent |

LC06EMWET | 2277 | Percentage of area of emergent herbaceous wetlands from NLCD 2006 class 95 | percent | percent |

LC06EVERG | 2262 | Percentage of evergreen forest from NLCD 2006 class 42 | percent | percent |

LC06FOREST | 2264 | Percentage of forest from NLCD 2006 classes 41-43 | percent | percent |

LC06FORSHB | 2460 | Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2006 | percent | percent |

LC06GRASS | 2268 | Percentage of grassland from NLCD 2006 class 71 | percent | percent |

LC06HERB | 2272 | Percentage of herbaceous from NLCD 2006 classes 71-74 | percent | percent |

LC06IMP | 2248 | Average percentage of impervious area determined from NLCD 2006 impervious dataset | percent | percent |

LC06LICHEN | 2270 | Percentage of lichens from NLCD 2006 class 73 | percent | percent |

LC06MIXFOR | 2263 | Percentage of mixed deciduous and evergreen forest from NLCD 2006 class 43 | percent | percent |

LC06MOSS | 2271 | Percentage of moss from NLCD 2006 class 74 | percent | percent |

LC06OPNLO | 2258 | Percentage of area developed, open space and low intensity combined, NLCD2006 classes 21 and 22 | percent | percent |

LC06PAST | 2273 | Percentage of area of pasture area from NLCD 2006 class 81 | percent | percent |

LC06PLANT | 2275 | Percentage of planted area from NLCD 2006 classes 81 and 82 | percent | percent |

LC06SCRUB | 2267 | Percentage of scrub from NLCD 2006 classes 51 and 52 | percent | percent |

LC06SEDGE | 2269 | Percentage of sedge from NLCD 2006 class 72 | percent | percent |

LC06SHRUB | 2266 | Percentage of shrub scrub from NLCD 2006 class 52 | percent | percent |

LC06SNOIC | 2252 | Percent snow and ice from NLCD 2006 class 12 | percent | percent |

LC06STOR | 2251 | Percentage of water bodies and wetlands determined from the NLCD 2006 | percent | percent |

LC06WATER | 2249 | Percent of open water, class 11, from NLCD 2006 | percent | percent |

LC06WATWET | 2250 | Percent open water and herbaceous wetland from NLCD 2006 classes 11 and 95 | percent | percent |

LC06WDWET | 2276 | Percentage of area of wooded wetlands from NLCD 2006 class 90 | percent | percent |

LC06WETLND | 2462 | Percentage of wetlands, classes 90 and 95, from NLCD 2006 | percent | percent |

LC11ABARE | 2773 | Area of barren from NLCD 2011 class 31 | square miles | km2 |

LC11ACROP | 2774 | Area of area of cultivated crops from NLCD 2011 class 82 | square miles | km2 |

LC11ADECID | 2775 | Area of deciduous forest from NLCD 2011 class 41 | square miles | km2 |

LC11ADEV | 2776 | Area of developed land-use from NLCD 2011 classes 21-24 | square miles | km2 |

LC11ADEVHI | 2777 | Area of developed land, high intensity, NLCD 2011 class 24 | square miles | km2 |

LC11ADEVLO | 2778 | Area of developed land, low intensity, from NLCD 2011 class 22 | square miles | km2 |

LC11ADEVMD | 2779 | Area of developed land, medium intensity, NLCD 2011 class 23 | square miles | km2 |

LC11ADVOPN | 2780 | Area of developed open land from NLCD 2011 class 21 | square miles | km2 |

LC11ADWARF | 2781 | Area of dwarf scrub from NLCD 2011 class 51 | square miles | km2 |

LC11AEMWET | 2782 | Area of area of emergent herbaceous wetlands from NLCD 2011 class 95 | square miles | km2 |

LC11AEVERG | 2783 | Area of evergreen forest from NLCD 2011 class 42 | square miles | km2 |

LC11AFORES | 2784 | Area of forest from NLCD 2011 classes 41-43 | square miles | km2 |

LC11AGRASS | 2785 | Area of grassland from NLCD 2011 class 71 | square miles | km2 |

LC11AGRI | 2786 | Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82 | percent | percent |

LC11AHERB | 2787 | Area of herbaceous from NLCD 2011 classes 71-74 | square miles | km2 |

LC11AIMP | 2788 | Area of impervious land surface determined from NLCD 2011 impervious dataset | square miles | km2 |

LC11ALICHN | 2789 | Area of lichens from NLCD 2011 class 73 | square miles | km2 |

LC11ALTFOR | 2790 | Percentage of forested land area from NLCD2011 classes 22, 41-43 and 90 | percent | percent |

LC11AMOSS | 2791 | Area of moss from NLCD 2011 class 74 | square miles | km2 |

LC11AMXFOR | 2792 | Area of mixed deciduous and evergreen forest from NLCD 2011 class 43 | square miles | km2 |

LC11AOPNLO | 2793 | Area of developed land, open space and low intensity combined, NLCD2011 classes 21 and 22 | square miles | km2 |

LC11APAST | 2794 | Area of area of pasture area from NLCD 2011 class 81 | square miles | km2 |

LC11APLANT | 2795 | Area of planted area from NLCD 2011 classes 81 and 82 | square miles | km2 |

LC11ASCRUB | 2796 | Area of scrub from NLCD 2011 classes 51 and 52 | square miles | km2 |

LC11ASEDGE | 2797 | Area of sedge from NLCD 2011 class 72 | square miles | km2 |

LC11ASHRUB | 2798 | Area of shrub scrub from NLCD 2011 class 52 | square miles | km2 |

LC11ASNOIC | 2799 | Area of snow and ice from NLCD 2011 class 12 | square miles | km2 |

LC11ASTOR | 2800 | Area of water bodies and wetlands determined from the NLCD 2011 classes 11, 90 and 95 | square miles | km2 |

LC11AWATER | 2801 | Area of water from NLCD 2011 class 11 | square miles | km2 |

LC11AWATWT | 2802 | Area open water and herbaceous wetland from NLCD 2011 classes 11 and 95 | square miles | km2 |

LC11AWDWET | 2803 | Area of area of wooded wetlands from NLCD 2011 class 90 | square miles | km2 |

LC11AWETL | 2804 | Area of wetlands from NLCD 2011 classes 90 and 95 | square miles | km2 |

LC11BARE | 2805 | Percentage of barren from NLCD 2011 class 31 | percent | percent |

LC11BARSCB | 2806 | Percentage of barren and scrub land from NLCD classes 31, 51, and 52 | percent | percent |

LC11CROP | 2807 | Percentage of area of cultivated crops from NLCD 2011 class 82 | percent | percent |

LC11CRPHAY | 2808 | Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2011 | percent | percent |

LC11DECID | 2809 | Percentage of deciduous forest from NLCD 2011 class 41 | percent | percent |

LC11DEV | 2676 | Percentage of developed (urban) land from NLCD 2011 classes 21-24 | percent | percent |

LC11DEV | 2810 | Percentage of land-use from NLCD 2011 classes 21-24 | percent | percent |

LC11DEVHI | 2811 | Percentage of area developed, high intensity, NLCD 2011 class 24 | percent | percent |

LC11DEVLMH | 2926 | Percentage of land-use from NLCD 2011 classes 22-24 low to high developed | percent | percent |

LC11DINT | 2812 | Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2011 | percent | percent |

LC11DVLO | 2813 | Percentage of developed area, low intensity, from NLCD 2011 class 22 | percent | percent |

LC11DVMD | 2814 | Percentage of area developed, medium intensity, NLCD 2011 class 23 | percent | percent |

LC11DVMDHI | 2815 | Percentage of area developed, medium and high intensity, NLCD 2011 classes 23 and 24 | percent | percent |

LC11DVOPN | 2816 | Percentage of developed open area from NLCD 2011 class 21 | percent | percent |

LC11DWARF | 2817 | Percentage of dwarf scrub from NLCD 2011 class 51 | percent | percent |

LC11EMWET | 2818 | Percentage of area of emergent herbaceous wetlands from NLCD 2011 class 95 | percent | percent |

LC11EVERG | 2819 | Percentage of evergreen forest from NLCD 2011 class 42 | percent | percent |

LC11FOREST | 2820 | Percentage of forest from NLCD 2011 classes 41-43 | percent | percent |

LC11FORSHB | 2821 | Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2011 | percent | percent |

LC11GRASS | 2822 | Percentage of grassland from NLCD 2011 class 71 | percent | percent |

LC11HERB | 2823 | Percentage of herbaceous from NLCD 2011 classes 71-74 | percent | percent |

LC11IMP | 2772 | Average percentage of impervious area determined from NLCD 2011 impervious dataset | percent | percent |

LC11LICHEN | 2825 | Percentage of lichens from NLCD 2011 class 73 | percent | percent |

LC11MIXFOR | 2826 | Percentage of mixed deciduous and evergreen forest from NLCD 2011 class 43 | percent | percent |

LC11MOSS | 2827 | Percentage of moss from NLCD 2011 class 74 | percent | percent |

LC11OPNLO | 2828 | Percentage of area developed, open space and low intensity combined, NLCD2011 classes 21 and 22 | percent | percent |

LC11PAST | 2829 | Percentage of area of pasture area from NLCD 2011 class 81 | percent | percent |

LC11PLANT | 2830 | Percentage of planted area from NLCD 2011 classes 81 and 82 | percent | percent |

LC11SCRUB | 2831 | Percentage of scrub from NLCD 2011 classes 51 and 52 | percent | percent |

LC11SEDGE | 2832 | Percentage of sedge from NLCD 2011 class 72 | percent | percent |

LC11SHRUB | 2833 | Percentage of shrub scrub from NLCD 2011 class 52 | percent | percent |

LC11SNOIC | 2834 | Percent snow and ice from NLCD 2011 class 12 | percent | percent |

LC11STOR | 2835 | Percentage of water bodies and wetlands determined from the NLCD 2011 | percent | percent |

LC11WATER | 2836 | Percent of open water, class 11, from NLCD 2011 | percent | percent |

LC11WATWET | 2837 | Percent open water and herbaceous wetland from NLCD 2011 classes 11 and 95 | percent | percent |

LC11WDWET | 2838 | Percentage of area of wooded wetlands from NLCD 2011 class 90 | percent | percent |

LC11WETLND | 2839 | Percentage of wetlands, classes 90 and 95, from NLCD 2011 | percent | percent |

LC92FOREST | 2312 | Percentage of forest from NLCD 1992 classes 41-43 | percent | percent |

LC92STOR | 1352 | Percentage of water bodies and wetlands determined from the NLCD | percent | percent |

LENGTH | 89 | Length along the main channel from the measuring location extended to the basin divide | miles | km |

LFPLENGTH | 1904 | Length of longest flow path | miles | km |

LIME | 150 | Percentage of area of limestone geology | percent | percent |

LNG_GAGE | 8 | Longitude | decimal degrees | decimal degrees |

LOESSDEP | 86 | Depth of loess deposits | feet | m |

LOGDA | 1857 | Logarithm base 10 of drainage area | Log base 10 | Log base 10 |

LOGDA1000 | 1265 | Log of drainage area divided by 1000 | Log base 10 | Log base 10 |

LOGPREC28 | 1267 | Log of mean annual precipitation from PRISM divided by 28 | inches | mm |

LONG_CENT | 87 | Longitude Basin Centroid | decimal degrees | decimal degrees |

LONGESTFP | 2092 | Longest distance along stream from site of interest to top of basin | miles | km |

LONG_OUT | 1198 | Longitude of Basin Outlet | degrees | degrees |

LON_NHD | 1206 | Longitude of station location on National Hydrography Dataset | degrees | degrees |

LOWEQU | 20 | Indicates whether the site was used to develop low-flow regression equations | Yes or No | Yes or No |

LOWREG | 16 | Low-Flow Hydrologic Region code | dimensionless | dimensionless |

LSTPERM | 85 | Permeability of least permeable layer | inches per hour | mm per hr |

LU12 | 168 | Index based on the sum of land use types I and II in Portland-Vancouver WA | square miles | km2 |

LU92BARE | 1431 | Percent Barren from NLCD1992 | percent | percent |

LU92DEV | 1430 | Percent Developed from NLCD92 | percent | percent |

LU92FORUP | 1432 | Percent Forested Upland from NLCD1992 | percent | percent |

LU92HRBC | 1434 | Percent Cultivated Herbaceous Upland from NLCD1992 | percent | percent |

LU92HRBN | 1433 | Percent Natural Herbaceous Upland from NLCD1992 | percent | percent |

LU92PLANT | 2869 | Percentage of planted area from NLCD 1992 classes 81 and 82 | percent | percent |

LU92WATER | 1429 | Percent Water from NLCD1992 | percent | percent |

LU92WETLN | 1435 | Percent Wetland from NLCD1992 | percent | percent |

MAJ_ROADS | 2902 | Length of non-state major roads in basin | miles | km |

MAPM | 1440 | Mean Annual Precip Basin Average | inches | mm |

MAR | 1710 | Mean annual runoff for the period of record in inches | inches | mm |

MAR14D10Y | 1704 | 14-day mean annual runoff that occurs on average once in 10 years | inches | mm |

MAR14D20Y | 1705 | 14-day eman annual runoff that occurs on average once in 20 years | inches | mm |

MAR14D2Y | 1702 | 14-day mean annual runoff that occurs on average once in 2 years | inches | mm |

MAR14D50Y | 1706 | 14-day mean annual runoff that occurs on average once in 50 years | inches | mm |

MAR14D5Y | 1703 | 14-day mean annual runoff that occurs on average once in 5 years | inches | mm |

MAR1D10Y | 1687 | 1-day mean annual funoff that occurs on average once in 10 years | inches | mm |

MAR1D20Y | 1688 | 1-day mean annual runoff that occurs on average once in 20 years | inches | mm |

MAR1D2Y | 1685 | 1-day mean annual runoff that occurs on average once in 2 years. | inches | mm |

MAR1D50Y | 1689 | 1-day mean annual runoff that occurs on aberage once in 50 years. | inches | mm |

MAR1D5Y | 1686 | 1-day mean annual runoff that occurs on average once in 5 years | inches | mm |

MAR30D10Y | 1709 | 30-day mean annual runoff that occurs on average once in 10 years | inches | mm |

MAR30D2Y | 1707 | 30-day mean annual runoff that occurs on average once in 2 years | inches | mm |

MAR30D5Y | 1708 | 30-day man annual runoff that occurs on average once in 5 years | inches | mm |

MAR3D10Y | 1692 | 3-day mean annual runoff that occurs on average once in 10 years | inches | mm |

MAR3D20Y | 1693 | 3-day mean annual runoff that occurs on average once in 20 years | inches | mm |

MAR3D2Y | 1690 | 3-daymean annual runoff that occurs on average once in 2 years | inches | mm |

MAR3D50Y | 1694 | 3-day mean annual runoff that occurs on average once in 50 years. | inches | mm |

MAR3D5Y | 1691 | 3_Day_5_Year_Mean_Annual_Runoff | inches | mm |

MAR4D3Y | 1695 | 4_Day_3_Year_Mean_Annual_Runoff | inches | mm |

MAR7D10Y | 1699 | 7-day mean annual runoff that occurs on average once in 10 years | inches | mm |

MAR7D20Y | 1700 | 7-day mean annual runoff that occurs on average once in 20 years | inches | mm |

MAR7D2Y | 1696 | 7-day mean annual runoff that occurs on avrage once in 2 years | inches | mm |

MAR7D50Y | 1701 | 7-day mean annual runoff that occurs on average once in 50 years | inches | mm |

MAR7D5Y | 1698 | 7-day mean annual runoff that occurs on average once in 5 years | inches | mm |

MARAVPRE | 113 | Mean March Precipitation | inches | mm |

MARAVTMP | 114 | Mean March Temperature | degrees F | degrees C |

MARCFSM | 1766 | Mean annual runoff for the period of record in cubic feet persecond | cubic feet per second per square mile | cubic meters per second per square kilometer |

MAREGION | 1402 | Region of Massachusetts 0 for Eastern 1 for Western | dimensionless | dimensionless |

MARMAXTMP | 115 | Mean Maximum March Temperature | degrees F | degrees C |

MAXBSLOPD | 1807 | Maximum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data. | degrees | degrees |

MAXTEMP | 1803 | Mean annual maximum air temperature over basin area from PRISM 1971-2000 800-m grid | degrees F | degrees C |

MAXTEMPC | 2897 | Mean annual maximum air temperature over basin area, in degrees Centigrade | degrees | degrees |

MAYAVPRE | 116 | Mean May Precipitation | inches | mm |

MAYAVTMP | 117 | Mean May Temperature | degrees F | degrees C |

MCD | 12 | MCD Code | dimensionless | dimensionless |

MCSP | 1758 | Main channel slope proportion computed by Basinsoft as main channel length divided by the square root of the main channel slope | dimensionless | dimensionless |

MCSRBSFT | 1756 | Main-channel sinuosity ratio computed by Basinsoft as main channel length divided by basin length | dimensionless | dimensionless |

MDAREA | 2239 | Drainage area of the basin within the State of Maryland | square miles | km2 |

MEDPREC | 133 | Median Annual Precipitation | inches | mm |

MEDTILL | 152 | Percentage of area of medium-textured glacial till | percent | percent |

MESZOIC | 2451 | Percent of area within the Mesozoic Basins | percent | percent |

MINBELEV | 135 | Minimum basin elevation | feet | m |

MINBSLOPD | 1806 | Minimum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data. | degrees | degrees |

MIN_ROADS | 2903 | Length of non-state minor roads in basin | miles | km |

MINTEMP | 1802 | Mean annual minimum air temperature over basin area from PRISM 1971-2000 800-m grid | degrees F | degrees C |

MINTEMP_W | 2671 | Mean winter minimum air temperature over basin surface area | degrees F | degrees C |

MIXFOR | 1311 | Percentage of land area covered by mixed deciduous and coniferous forest | percent | percent |

MONREG | 18 | Monthly and Annual Hydrologic Region code | dimensionless | dimensionless |

MORTILL | 1183 | Percentage of End Moraines of Fine-Textured Till | percent | percent |

MR30D2Y | 1683 | 30-day mean annual runoff that occurs on average once every two years | inches | mm |

MR7D10Y | 1682 | 7-day mean annual runoff that occurs on average once every 2 years | inches | mm |

MR7D2Y | 1681 | 7-day mean annual runoff that occurs on average once every 2 years | inches | mm |

MSTPERM | 1770 | Permeability of the most permeable layer | inches per hour | mm per hr |

MUCK | 154 | Percentage of area of peat and muck | percent | percent |

MXSNO | 1772 | 50th percentile of seasonal maximum snow depth from Northeast Regional Climate Center atlas by Cember and Wilks, 1993 | inches | mm |

NCMR | 1711 | North Carolina mean annual runoff | cubic feet per second per square mile | cubic meters per second per square kilometer |

NDAY_REC | 1210 | Number of days of record | days | days |

NDAYSGT0 | 1211 | Number of days with flow greater than zero | days | days |

NFSL30 | 1858 | North-Facing Slopes Greater Than 30 Percent | percent | percent |

NFSL30_10M | 1854 | Percent area with north-facing slopes greater than 30 percent from 10-meter NED. | percent | percent |

NFSL30_30M | 1181 | Percent area with north-facing slopes greater than 30 percent from 30-meter DEM. | percent | percent |

NOFORWET | 2645 | Percentage of land area covered by non-forested wetlands - source not specified | percent | percent |

NONCONTDA | 2844 | Area within the delineated basin that does not contribute to the flow at the outlet of the basin | square miles | km2 |

NOVAVPRE | 127 | Mean November Precipitation | inches | mm |

NOVAVTMP | 128 | Mean November Temperature | degrees F | degrees C |

NRCSPCT | 2854 | Percent of contributing drainage area regulated by NRCS floodwater-retarding structures | percent | percent |

NYMAR | 2151 | New York mean annual runoff from Randall (1996) | inches | mm |

NY_UNDFLOW | 2674 | Rate of underflow downvalley through sand and gravel according to NY 2010-5063 | dimensionless | dimensionless |

OCTAVPRE | 125 | Mean October Precipitation | inches | mm |

OCTAVTMP | 126 | Mean October Temperature | degrees F | degrees C |

OHCLFAC100 | 1438 | Ohio Climate Factor 100 Year | dimensionless | dimensionless |

OHCLFAC2 | 1436 | Ohio Climate Factor 2 Year | dimensionless | dimensionless |

OHCLFAC25 | 1437 | Ohio Climate Factor 25 Year | dimensionless | dimensionless |

OH_INF_IND | 2068 | Index of relative infiltration from Koltun(1986) | dimensionless | dimensionless |

OHPHYSSECT | 1426 | Ohio Physiographic Sections | dimensionless | dimensionless |

OHREGA | 1193 | Ohio Region A Indicator | dimensionless | dimensionless |

OHREGC | 1194 | Ohio Region C Indicator | dimensionless | dimensionless |

OHREG_CODE | 1425 | Ohio Flood Region Letter Code | dimensionless | dimensionless |

OmegaEM | 2079 | Generalized regression residual as defined in TX SIR 2009-5087 | dimensionless | dimensionless |

ORDOMISS | 1832 | Percent Surficial Geology as Ordovician and Mississippian Rocks | percent | percent |

OR_HIPERMA | 1801 | Percent basin surface area containing high permeability aquifer units as defined in SIR 2008-5126 | percent | percent |

OR_HIPERMG | 1805 | Percent basin surface area containing high permeability geologic units as defined in SIR 2008-5126 | percent | percent |

ORREG2 | 2866 | Indicator flag for Oregon region 2 | dimensionless | dimensionless |

OTHEQU | 21 | Indicates whether the site was used to develop regression equations for other than high or low flows | Yes or No | Yes or No |

OUTLETELEV | 1867 | Elevation of the stream outlet in feet above NAVD88. | feet | m |

OUTLETX | 2168 | Basin outlet horizontal (x) location in state plane coordinates | State plane coordinates | State plane coordinates |

OUTLETXA83 | 2500 | Basin outlet horizontal (x) location in NAD 1983 Albers | NAD 1983 Albers | NAD 1983 Albers |

OUTLETXRI | 2369 | Basin outlet horizontal (x) location in Rhode Island state plane coordinates | State plane coordinates | State plane coordinates |

OUTLETY | 2169 | Basin outlet vertical (y) location in state plane coordinates | State plane coordinates | State plane coordinates |

OUTLETYA83 | 2501 | Basin outlet horizontal (Y) location in NAD 1983 Albers | NAD 1983 Albers | NAD 1983 Albers |

OUTLETYRI | 2370 | Basin outlet vertical (y) location in Rhode Island state plane coordinates | State plane coordinates | State plane coordinates |

OUTWASH | 153 | Percentage of area of outwash | percent | percent |

OUTXA83M | 2914 | Basin outlet horizontal (x) location in NAD 1983 Albers | NAD 1983 Albers meters | NAD 1983 Albers meters |

OUTYA83M | 2915 | Basin outlet horizontal (Y) location in NAD 1983 Albers | NAD 1983 Albers meters | NAD 1983 Albers meters |

PCLAY | 147 | Percentage of lacustrine clay and silt | percent | percent |

PCTREG1 | 1876 | Percentage of drainage area located in Region 1 | percent | percent |

PCTREG2 | 1877 | Percentage of drainage area located in Region 2 | percent | percent |

PCTREG2011 | 3284 | Percent of the basin which lies upstream from reservoirs in 2011 | percent | percent |

PCTREG3 | 1878 | Percentage of drainage area located in Region 3 | percent | percent |

PCTREG4 | 1879 | Percentage of drainage area located in Region 4 | percent | percent |

PCTREG5 | 1880 | Percentage of drainage area located in Region 5 | percent | percent |

PCTSNDGRV | 1752 | Percentage of land surface underlain by sand and gravel deposits | percent | percent |

PDIGMET | 2450 | Percent area of igneous and metamorphic within the Piedmont Physiographic Region | percent | percent |

PEMWETNWI | 2945 | Percentage of palustrine emergent wetlands from National Wetlands Inventory | percent | percent |

PERENNIAL | 3729 | Perennial stream based on NHD FlowLine FCode = 46003 | dimensionless | dimensionless |

PERM12IN | 1906 | Area-weighted average soil permeability for top 12 inches of soil | inches per hour | mm per hr |

PERM24IN | 1907 | Area-weighted average soil permeability for top 24 inches of soil | inches per hour | mm per hr |

PERMGTE2IN | 2065 | Percent of area underlain by soils with permeability greater than or equal to 2 inches per hour | percent | percent |

PERMSSUR | 2386 | Area-weighted average soil permeability from NRCS SSURGO database | inches per hour | mm per hr |

PERREC | 5 | Period of record | years | years |

PFLATLOW | 2928 | Flat lands lower than median elevation from Wolock 2003 unpublished data | percent | percent |

PFLATUP | 2929 | Flat lands higher than median elevation from Wolock 2003 unpublished data | percent | percent |

PII_SD | 2771 | Maximum 24-hour precipitation that occurs on average once in 2 years minus 1.5 inches | inches | mm |

PKDPTH10 | 1845 | Depth of the 10-year flood discharge in feet above the baseline_depth. | feet | m |

PKDPTH100 | 1848 | Depth of the 100-year flood discharge in feet above the baseline_depth. | feet | m |

PKDPTH2 | 1844 | Depth of the 2-year flood discharge in feet above the baseline_depth. | feet | m |

PKDPTH25 | 1846 | Depth of the 25-year flood discharge in feet above the baseline_depth. | feet | m |

PKDPTH50 | 1847 | Depth of the 50-year flood discharge in feet above the baseline_depth. | feet | m |

PKDPTH500 | 1849 | Depth of the 500-year flood discharge in feet above the baseline_depth. | feet | m |

PLCHSWAMP | 1403 | Percentage of the main channel length that flows through swamps | percent | percent |

PMPE | 2927 | Precipitation minus potential evaporation from Wolock 2003 unpublished data | millimeters (non-converting) | millimeters (non-converting) |

POPDENS | 67 | Basin Population Density | persons per square mile | persons per km2 |

PRC1 | 1862 | Mean January Precipitation | dimensionless | dimensionless |

PRC4 | 1860 | Mean April Precipitation | dimensionless | dimensionless |

PRC8 | 1861 | Mean August Precipitation | dimensionless | dimensionless |

PRCWINTER | 1291 | Mean annual precipitation for December through February | inches | mm |

PRDECFEB00 | 2940 | Basin average mean precipitation for December to February from PRISM 1971-2000 | inches | mm |

PRDECFEB10 | 2651 | Basin average mean precipitation for December to February from PRISM 1981-2010 | inches | mm |

PRDECFEB90 | 1347 | Basin average mean precipitation for December to February from PRISM 1961-1990 | inches | mm |

PREBC0103 | 1307 | Mean annual precipitation of basin centroid for January 1 to March 15 winter period | inches | mm |

PREBC_1112 | 2077 | Mean annual precipitation of basin centroid for November 1 to December 31 period | inches | mm |

PREC0711 | 2873 | Mean annual dry season precipitation, July through November | inches | mm |

PREC10to4 | 1305 | Mean precipitation for winter period defined as October to April | inches | mm |

PREC1206 | 2874 | Mean annual wet season precipitation, December through June | inches | mm |

PRECIP | 96 | Mean Annual Precipitation | inches | mm |

PRECIP28 | 1266 | Mean annual precipitation from PRISM divided by 28 | inches | mm |

PRECIPCENT | 1427 | Mean Annual Precip at Basin Centroid | inches | mm |

PRECIPOUT | 1866 | Mean annual precip at the stream outlet (based on annual PRISM precip data in inches from 1971-2000) | inches | mm |

PRECless35 | 1187 | Mean Annual Precip - 35 (LA ROI Parm) | inches | mm |

PRECPRIS00 | 2646 | Basin average mean annual precipitation for 1971 to 2000 from PRISM | inches | mm |

PRECPRIS10 | 2650 | Basin average mean annual precipitation for 1981 to 2010 from PRISM | inches | mm |

PREG_03_05 | 1310 | Mean precipitation at gaging station location for March 16 to May 31 spring period | inches | mm |

PREG_06_10 | 1309 | Mean precipitation at gaging station location for June to October summer period | inches | mm |

PREG_11_05 | 1868 | Mean monthly precipitation for November through May at the stream outlet | inches | mm |

PREMARAPR | 2061 | Precipitation March-April basin average, mean monthly as defined in SIR 2008-5065 | inches | mm |

PRENOVAPR | 1836 | Precipitation November-April basin average, mean monthly as defined in SIR 2008-5065 | inches | mm |

PRENOVDEC | 1837 | Precipitation November-December basin average, mean monthly as defined in SIR 2008-5065 | inches | mm |

PRJUNAUG00 | 2899 | Mean seasonal precipitation June to August, basin average from PRISM 1971-2000 | inches | mm |

PRMARMAY00 | 2941 | Basin average mean precipitation for March to May from PRISM 1971-2000 | inches | mm |

PRMAYJUL90 | 2870 | Basin average mean precipitation for May to July from PRISM 1961-1990 | inches | mm |

PRNOVAPR00 | 2447 | Precipitation November-April basin average, mean seasonal from PRISM 1971-2000 | inches | mm |

PRNOVAPR90 | 2446 | Precipitation November-April basin average, mean seasonal from PRISM 1961-1990 | inches | mm |

PROTECTED | 2865 | Percent of protected Federal and State owned land within the basin | percent | percent |

PRSEPNOV00 | 2942 | Basin average mean precipitation for September to November from PRISM 1971-2000 | inches | mm |

PSFSLp1 | 1190 | Pct. South Facing Slopes plus 1 (ID ROI Parm) | percent | percent |

QSSPERMTHK | 2944 | Index of the permeability of surficial Quaternary sediments computed as in SIR 2014-5177 | dimensionless | dimensionless |

RCHRG_ANN | 2075 | Annual ground water recharge rate | inches | mm |

RCHRG_FAL | 2074 | Ground water recharge rate during fall season November 1 to December 31 | inches | mm |

RCHRG_SPR | 2072 | Ground water recharge rate during spring season March 16 to May 31 | inches | mm |

RCHRG_SUM | 2073 | Ground water recharge rate during summer season June 1 to October 31 | inches | mm |

RCHRG_WIN | 2071 | Ground water recharge rate during winter season January 1 to March 15 | inches | mm |

RCN | 162 | Runoff-curve number as defined by NRCS (http://policy.nrcs.usda.gov/OpenNonWebContent.aspx?content=17758.wba) | dimensionless | dimensionless |

RCNMD97 | 2246 | Runoff curve number determined from STATSGO soils and MD Dept of Planning 1997 land use | dimensionless | dimensionless |

REGULATE | 4 | Indicates whether flow at the site is affected by regulations or diversions | Yes or No | Yes or No |

RELIEF | 160 | Maximum - minimum elevation | feet | m |

RELRELF | 159 | Basin relief divided by basin perimeter | feet per mi | m per km |

REMARKS | 6 | Remarks | dimensionless | dimensionless |

RESMD97 | 2242 | Percent area of residential land use from Maryland Dept of Planning 1997 land-use data | percent | percent |

ROCKDEP | 71 | Depth to rock | feet | m |

ROIREGN | 25 | ID for the radius of Influence region | dimensionless | dimensionless |

ROTUND | 2361 | Rotundity computed as 0.785 times shape factor (SHAPE) | dimensionless | dimensionless |

ROTUNDBSFT | 1755 | Rotundity of basin from Basinsoft computed as 0.785 times shape factor | dimensionless | dimensionless |

RSD | 2401 | Relative stream density first defined in SIR 2012_5171 | dimensionless | dimensionless |

RUGGED | 1759 | Ruggedness number computed as stream density times basin relief | feet per mi | m per km |

RUNCOEF | 161 | Soil runoff coefficient defined in Davis (1975) | dimensionless | dimensionless |

SANDGRAV | 1290 | Fraction of land surface underlain by sand and gravel deposits | dimensionless | dimensionless |

SANDGRAVAF | 2648 | Fraction of land surface underlain by sand and gravel aquifers | dimensionless | dimensionless |

SANDGRAVAP | 2647 | Percentage of land surface underlain by sand and gravel aquifers | percent | percent |

SD_AS | 2850 | Percentage of Artesian Springs from Sando and others (2008) | percent | percent |

SD_ASLZ | 2851 | Percentage of Loss Zone/Artesian Springs from Sando and others (2008) | percent | percent |

SD_BHEXT | 2852 | Percentage of Black Hills Exterior from Sando and others (2008) | percent | percent |

SD_CC | 2849 | Percentage of Crystaline Core from Sando and others (2008) | percent | percent |

SD_LSTHW | 2848 | Percentage of Limestone Headwaters from Sando and others (2008) | percent | percent |

SD_LSTLZ | 2847 | Percentage of Limestone Loss Zone from Sando and others (2008) | percent | percent |

SD_SNDHLS | 2853 | Percentage of Sand Hills setting from Sando and others (2008) | percent | percent |

SEPAVPRE | 123 | Mean September Precipitation | inches | mm |

SEPAVTMP | 124 | Mean September Temperature | degrees F | degrees C |

SHAPEBSFT | 1754 | Shape factor from Basinsoft computed as basin length divided by basin width | dimensionless | dimensionless |

SINUOS | 90 | Main Channel Sinuosity | miles per mile | km per km |

SLENRAT | 163 | Main channel length - squared - divided by the contributing drainage area | dimensionless | dimensionless |

SLOP30 | 1859 | Slopes Greater Than 30 Percent | percent | percent |

SLOP30_10M | 1855 | Percent area with slopes greater than 30 percent from 10-meter NED | percent | percent |

SLOP30_30M | 1182 | Percent area with slopes greater than 30 percent from 30-meter DEM. | percent | percent |

SLOP50 | 1777 | Slopes Greater Than 50 Percent as percent of drainage area | percent | percent |

SLOP50_30M | 2855 | Percent area with slopes greater than 50 percent from 30-meter DEM. | percent | percent |

SLOPERAT | 1760 | Slope ratio computed as main channel slope divided by basin slope | dimensionless | dimensionless |

SLOPERATIO | 1773 | Ratio of main channel slope to basin slope as defined in SIR 2006-5112 | dimensionless | dimensionless |

SLPFM3D | 1905 | Change in elevation divided by length between points 10 and 85 percent of distance along the longest flow path to the basin divide, LFP from 3D grid | feet per mi | m per km |

SN10 | 26 | Maximum March 15 Water Equivalent of Snow Cover at 10-Year Recurrence Interval | inches | mm |

SN100 | 27 | Maximum March 15 Water Equivalent of Snow Cover at 100-Year Recurrence Interval | inches | mm |

SN2 | 36 | Maximum March 15 Water Equivalent of Snow Cover at 2-Year Recurrence Interval | inches | mm |

SN25 | 34 | Maximum March 15 Water Equivalent of Snow Cover at 25-Year Recurrence Interval | inches | mm |

SN50 | 37 | Maximum March 15 Water Equivalent of Snow Cover at 50-Year Recurrence Interval | inches | mm |

SNOAPR | 38 | Mean Water Equivalent of Snow Cover in April | inches | mm |

SNOFALL | 97 | Mean Annual Snowfall | inches | mm |

SNOMAR | 91 | Mean Water Equivalent of Snow Cover in March | inches | mm |

SNOWATER | 132 | Water Equivalent of Mean Annual Snowfall | inches | mm |

SOILA | 144 | Percentage of area of Hydrologic Soil Type A | percent | percent |

SOILCorD | 2080 | Percentage of area of Hydrologic Soil Type C or D from SSURGO | percent | percent |

SOILD | 145 | Percentage of area of Hydrologic Soil Type D | percent | percent |

SOILINDEX | 1196 | Mean STATSGO Hydrologic Soils Index (from PL. 2 WRIR 03-4107 for WY) | dimensionless | dimensionless |

SOIL_INF | 164 | Soil infiltration index from NRCS | inches | mm |

SOILPERM | 63 | Average Soil Permeability | inches per hour | mm per hr |

SRUN | 2880 | Mean annual surface runoff | inches | mm |

SRUN0711 | 2881 | Mean annual dry season surface runoff, July through November | inches | mm |

SRUN1206 | 2882 | Mean annual wet season surface runoff, December through June | inches | mm |

SSURGOA | 2227 | Percentage of area of Hydrologic Soil Type A from SSURGO | percent | percent |

SSURGOAA | 2223 | Area underlain by hydrologic soil type A from SSURGO | square miles | km2 |

SSURGOAB | 2232 | Area underlain by hydrologic soil type B from SSURGO | square miles | km2 |

SSURGOAC | 2230 | Area underlain by hydrologic soil type C from SSURGO | square miles | km2 |

SSURGOAD | 2225 | Area underlain by hydrologic soil type D from SSURGO | square miles | km2 |

SSURGOB | 2234 | Percentage of area of Hydrologic Soil Type B from SSURGO | percent | percent |

SSURGOC | 2236 | Percentage of area of Hydrologic Soil Type C from SSURGO | percent | percent |

SSURGOCLAY | 2919 | Percentage of clay soils from SSURGO | percent | percent |

SSURGOD | 2442 | Percentage of area of Hydrologic Soil Type D from SSURGO | percent | percent |

SSURGODEP | 2390 | Area-weighted average soil depth from NRCS SSURGO database | inches | mm |

SSURGOKSAT | 2391 | Saturated hydraulic conductivity in micrometers per second from NRCS SSURGO database | micrometers per second | micrometers per second |

SSURGOM | 2930 | Percentage of organic matter in soils from SSURGO | percent | percent |

SSURGOSCAP | 2388 | Area-weighted average soil capacity from NRCS SSURGO database | inches | mm |

SSURGPDRN | 2499 | Percentage of poorly drained soil, from SSURGO | percent | percent |

SSURGSAND | 2498 | Percentage of sand in soils, from SSURGO | percent | percent |

SSURGSILT | 2931 | Percentage of silt in soils from SSURGO | percent | percent |

SSURGWATCP | 2485 | Available water capacity of the top 60 inches of soil - determined from SSURGO data | in per in | mm per mm |

STAID | 1 | Station Identification Number | dimensionless | dimensionless |

STANAME | 2 | Station Name | dimensionless | dimensionless |

STATE | 14 | State code | dimensionless | dimensionless |

STATE_HWY | 2901 | Length of state highways in basin | miles | km |

STATOM19_8 | 2496 | Percentage of soils with greater than 7.3 percent and less than or equal to 19.8 percent organic matter from STATSGO | percent | percent |

STATOM55_7 | 2497 | Percentage of soils with greater than 19.8 percent and less than or equal to 55.7 percent organic matter from STATSGO | percent | percent |

STATSCLAY | 2918 | Percentage of clay soils from STATSGO | percent | percent |

STATSCLAY10 | 2487 | Percentage of soils with less than 10 percent clay from STATSGO | percent | percent |

STATSCLY20 | 2488 | Percentage of soils with greater than 10 percent and less than or equal to 20 percent clay from STATSGO | percent | percent |

STATSCLY30 | 2489 | Percentage of soils with greater than 20 percent and less than or equal to 30 percent clay from STATSGO | percent | percent |

STATSCLY40 | 2490 | Percentage of soils with greater than 30 percent and less than or equal to 40 percent clay from STATSGO | percent | percent |

STATSCLY50 | 2491 | Percentage of soils with greater than 40 percent and less than or equal to 50 percent clay from STATSGO | percent | percent |

STATSCLY60 | 2492 | Percentage of soils with greater than 50 percent and less than or equal to 60 percent clay from STATSGO | percent | percent |

STATSDQUAL | 2318 | Drainage quality index from STATSGO, see http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml#Entity_and_Attribute_Information | dimensionless | dimensionless |

STATSGKSAT | 2392 | Saturated hydraulic conductivity in micrometers per second from NRCS STATSGO database | micrometers per second | micrometers per second |

STATSGOA | 2228 | Percentage of area of Hydrologic Soil Type A from STATSGO | percent | percent |

STATSGOAA | 2224 | Area underlain by hydrologic soil type A from STATSGO | square miles | km2 |

STATSGOAB | 2233 | Area underlain by hydrologic soil type B from STATSGO | square miles | km2 |

STATSGOAC | 2231 | Area underlain by hydrologic soil type C from STATSGO | square miles | km2 |

STATSGOAD | 2226 | Area underlain by hydrologic soil type D from STATSGO | square miles | km2 |

STATSGOB | 2235 | Percentage of area of Hydrologic Soil Type B from STATSGO | percent | percent |

STATSGOC | 2237 | Percentage of area of Hydrologic Soil Type C from STATSGO | percent | percent |

STATSGOD | 2894 | Percentage of area of Hydrologic Soil Type D from STATSGO | percent | percent |

STATSGODEP | 2389 | Area-weighted average soil depth from NRCS STATSGO database | inches | mm |

STATSGORO | 2443 | Drainage runoff number from STATSGO database where 1 is well and 7 is poor | dimensionless | dimensionless |

STATSOM0_5 | 2493 | Percentage of soils with less than 0.5 percent organic matter from STATSGO | percent | percent |

STATSOM2_6 | 2494 | Percentage of soils with greater than 0.50 percent and less than or equal to 2.60 percent organic matter from STATSGO | percent | percent |

STATSOM7_3 | 2495 | Percentage of soils with greater than 2.6 percent and less than or equal to 7.3 percent organic matter from STATSGO | percent | percent |

STATSPERM | 2385 | Area-weighted average soil permeability from NRCS STATSGO database | inches per hour | mm per hr |

STATSSCAP | 2387 | Area-weighted average soil capacity from NRCS STATSGO database | inches | mm |

STATSWATCP | 2486 | Available water capacity of the top 60 inches of soil - determined from STATSGO data | in per in | mm per mm |

STATYPE | 3 | Station type code | dimensionless | dimensionless |

STORAGE | 155 | Percentage of area of storage (lakes ponds reservoirs wetlands) | percent | percent |

STORAGEp1 | 1191 | Percent Storage plus 1 (MN ROI Parm) | percent | percent |

STORDELU | 1353 | Percentage of wetlands and water bodies determined from 2003 Delaware land-use dataset | percent | percent |

STORMD97 | 2244 | Percent area of storage (wetlands and water bodies) from Maryland Dept of Planning 1997 land-use data | percent | percent |

STORNHD | 1349 | Percent storage (wetlands and waterbodies) determined from 1:24K NHD | percent | percent |

STORNWI | 2649 | Percentage of storage (combined water bodies and wetlands) from the National Wetlands Inventory | percent | percent |

STRDEN | 1186 | Stream Density -- total length of streams divided by drainage area | miles per square mile | km per km2 |

STRDENED | 2513 | Stream Density -- total length of streams divided by drainage area, edited from NHD | miles per square mile | km per km2 |

STREAM_VARG | 2843 | Streamflow variability index as defined in WRIR 02-4068, computed from regional grid | dimensionless | dimensionless |

STRMTOT | 170 | Total length of mapped streams in basin | miles | km |

STRMTOTED | 2840 | Total length of mapped streams in basin, from edited hi-res NHD | miles | km |

SYNTHET | 23 | Blank if flow data were not synthesized - S if all flows were synthesized - SL if low flows were synthesized - SP if peak flows were synthesized | dimensionless | dimensionless |

TAU_ANN_G | 2906 | Tau, Average annual base-flow recession time constant as defined in SIR 2008-5065, estimated from a grid | days | days |

TAU_SPR_G | 2908 | Tau, Average base-flow recession time constant for March through April as defined in SIR 2008-5065, estimated from a grid | days | days |

TAU_WIN_G | 2907 | Tau, Average base-flow recession time constant for November through December as defined in SIR 2008-5065, estimated from a grid | days | days |

TEMP | 98 | Mean Annual Temperature | degrees F | degrees C |

TEMP_01_03 | 2076 | Basinwide average temperature for January to March period | degrees F | degrees C |

TEMP_06_10 | 1308 | Basinwide average temperature for June to October summer period | degrees F | degrees C |

TILL | 2362 | Percent surface area covered by till deposits | percent | percent |

TILROCK | 156 | Percentage of area of thin glacial till over bedrock | percent | percent |

TIMETOPK | 169 | TimeToPeak | hours | hours |

TNCLFACT2 | 1195 | 2-Year Climate Factor for Tennessee | dimensionless | dimensionless |

TNPHYSFAC | 1223 | Tenessee physiographic factor, computed as described in WRIR 03-4176, p. 14 | dimensionless | dimensionless |

TNSOILFAC | 1899 | Tennessee soil factor, percentage of area underlain by a soil permeability greater than or equal to 2 inches per hour | percent | percent |

TRUN0711 | 2875 | Mean annual dry season total runoff, July through November | inches | mm |

TRUN1206 | 2876 | Mean annual wet season total runoff, December through June | inches | mm |

TXURBINDEX | 1795 | Urbanization index defined in WRIR 82-18 | dimensionless | dimensionless |

UAF_OK | 1842 | Urban adjustment factor as described in OK WRIR 1997-4202 | dimensionless | dimensionless |

UPZ | 3726 | Percentage of the basin covered by upper Paleozoic strata from Reed & Bush (2005) | percent | percent |

URBAN | 157 | Percentage of basin with urban development | percent | percent |

URBAN15 | 2091 | Basin with urban development greater than 15 percent | Yes or No | Yes or No |

URBTHE2010 | 2923 | Proportion of drainage area that is in urban classes 7 to 10 from Theobald 2010 | dimensionless | dimensionless |

URBZERO | 2924 | Initial proportion of urban land use for Illinois urban equations which is zero by default | dimensionless | dimensionless |

VALLEN | 171 | Valley length measured along general path of floodplane from the outlet to the basin divide | miles | km |

VOLCANIC | 1776 | Percent of drainage area as surficial volcanic rocks as defined in SIR 2006-5035 | percent | percent |

VRCARB | 2453 | Percent of area of carbonate rocks within the Valley and Ridge Physiographic Region | percent | percent |

VRPLSLC | 2452 | Percent of area of siliciclastic rocks witin the Valley and Ridge or Appalachian Plateau Physiographic Regions | percent | percent |

WACTCH | 1302 | Width of active channel | feet | m |

WATCAP | 60 | Available water capacity of the top 60 inches of soil - determined from STATSGO data | in per in | mm per mm |

WATCAPINIL | 2939 | Available water capacity from Miller and White 1998 in cm per 100 cm | percent | percent |

WATCAPORC | 2909 | Available water capacity from STATSGO data using methods from SIR 2005-5116 | inches | mm |

WATCAPORR | 2910 | Available water capacity from STATSGO data using methods from SIR 2008-5126 | in per in | mm per mm |

WATER | 2643 | Percentage of land area covered by open water - source not specified | percent | percent |

WATWET | 1287 | Percent open water and herbaceous wetland from NLCD | percent | percent |

WBANKFULL | 1303 | Width of channel at bankfull | feet | m |

WE_MAR2 | 92 | Water equivalent of snow cover as of the first week in March - 2-year recurrence interval | inches | mm |

WETLAND | 158 | Percentage of Wetlands | percent | percent |

WETLNDLU06 | 2278 | Percentage of wetlands from NLCD 2006 classes 90 and 95 | percent | percent |

WETLNDNWI | 2846 | Percentage of wetlands as determined from the National Wetlands Inventory (2001) | percent | percent |

WR7D10Y | 1684 | 7-day R.O. that occurs in Nov. thru Mar. once every 10 years | inches | mm |