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Version 3 Basin Characteristic Definitions

The names of the basin characteristics given in the StreamStats output for ungaged sites are shown in the second column of the table below, named Characteristic. Shortened labels for the characteristics used by the database are shown in the first column, named Label. The definitions of the basin characteristics are given in third column, named Definition.
LabelIDDefinitionEnglishMetric
ABEL8K74Drainage Area below 8000ftsquare mileskm2
ABURN2863Total area burned within delineated basinsquare mileskm2
ACARBON40Area underlain by carbonate rocksquare mileskm2
ACHSWAMP53Main Channel Swampsquare mileskm2
ACLAY49Area underlain by lacustrine clay and siltsquare mileskm2
ACRSDFT41Area underlain by stratified driftsquare mileskm2
ACRSTILL42Area underlain by coarse-textured glacial tillsquare mileskm2
ACTIVE1217Station is currently activeYes or NoYes or No
ADETEN50Lake and Detention Basin Areasquare mileskm2
ADEVNLCD011227Total area of land-use classifications 21-24 from NLCD 2001square mileskm2
ADJCOEFF2320Coefficient to adjust estimates for percentage of carbonate rock in Western Marylanddimensionlessdimensionless
AFINMOR43Area underlain by end moraines of fine-textured tillsquare mileskm2
AFOREST44Area covered by forestsquare mileskm2
AGENCY_CD173USGS NWIS Agency code for Stationdimensionlessdimensionless
AGLACIER45Area covered by glacierssquare mileskm2
AGMD972240Percent area of agricultural land use from Maryland Dept of Planning 1997 land-use datapercentpercent
AG_OF_DA1797Agricultural Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035percentpercent
AIMPERV48Impervious areasquare mileskm2
ALAKE51Area of Lakes and Pondssquare mileskm2
ALIME52Area underlain by limestone geologysquare mileskm2
ALTIND1179Altitude Indexthousand feetkilometer
AMEDTILL134Area underlain by medium-textured glacial tillsquare mileskm2
AMUCK55Area underlain by peat and mucksquare mileskm2
AOS1439Average Maximum Overland Slopepercentpercent
AOUTWASH54Area underlain by outwashsquare mileskm2
APRAV100Mean April Temperaturedegrees Fdegrees C
APRAVPRE99Mean April Precipitationinchesmm
ARBEL8K39Drainage Area below 8000ftsquare mileskm2
ASANDGRAV2672Area of land surface underlain by sand and gravel depositssquare mileskm2
ASOILA46Area underlain by hydrologic soil type Asquare mileskm2
ASOILD47Area underlain by hydrologic soil type Dsquare mileskm2
ASTORAGE56Area of Storage (lakes - ponds - and wetlands )square mileskm2
ATILL2673Surface area covered by till depositssquare mileskm2
ATILROCK57Area underlain by thin glacial till over bedrocksquare mileskm2
AUGAV102Mean August Temperaturedegrees Fdegrees C
AUGAVPRE101Mean August Precipitationinchesmm
AURBAN58Area covered by urban land usesquare mileskm2
AVMXSS1185Average Maximum Soil Slopepercentpercent
AWETLAND59Area of Wetlandssquare mileskm2
AWETSG2675Area of lakes and wetlands underlain by sand and gravel depositssquare mileskm2
AZ_HIPERMA2316Percent basin surface area containing high permeability aquifer units as defined in SIR 20xx-xxxxpercentpercent
AZ_HIPERMG2317Percent basin surface area containing high permeability geologic units as defined in SIR 20xx-xxxxpercentpercent
AZIMUTH64Decimal degrees from north of a straight line connecting the points 10- and 85-percent of distance along main stream channeldecimal degreesdecimal degrees
BASELNDPTH1850Depth of the 50-percent flow duration in feet above the zero-flow point.feetm
BASIN10Local code of major drainage basin in which the station is locateddimensionlessdimensionless
BASINPERIM1778Perimeter of the drainage basin as defined in SIR 2004-5262mileskm
BASLENAH1361Basin length from outlet to basin divide determined using the method in the ArcHydro Toolsetmileskm
BASLENRAW 2842Basin length computed by ArcHydro method, unadjusted for biasmileskm
BASSTRMORD1762Strahler stream order of the main channel at the basin outletdimensionlessdimensionless
BASWIDTH2360Effective basin width computed as drainage area (DRNAREA) divided by basin length (BASLENAH)mileskm
BDF66Urbanization index described by Sauer and others (1981) - Also called Urbanization Index in Texasdimensionlessdimensionless
BEGIN_REC1208First day of recorddaysdays
BFREG2511Bankfull-flow region codedimensionlessdimensionless
BRMETA2448Percent area of metamorphic rocks within the Blue Ridge Physiographic Regionpercentpercent
BSHAPE106Basin Shape Factor for Areadimensionlessdimensionless
BSLDEM10ff1399Mean basin slope computed from 10 m DEM in feet per footfeet per footm per m
BSLDEM10M1201Mean basin slope computed from 10 m DEMpercentpercent
BSLDEM2501199Mean basin slope computed from 1:250K DEMpercentpercent
BSLDEM30ff2384Mean basin slope computed from 30 m DEM in feet per footfeet per footm per m
BSLDEM30FT2864Mean basin slope, based on slope percent grid from DEM with 30 foot pixelspercentpercent
BSLDEM30M1200Mean basin slope computed from 30 m DEMpercentpercent
BSLOPCM105Mean basin slope determined by summing lengths of all contours in basin mulitplying by contour interval and dividing product by drainage areafeet per mim per km
BSLOPD1222Mean basin slope measured in degreesdegreesdegrees
BSLOPDRAW2867Mean basin slope, in degrees, raw value unadjusted for biasdegreesdegrees
BSLOPGM104Mean basin slope determined using the grid-sampling methodfeet per footm per m
BURBNHI2861Percent of basin burned at high severitypercentpercent
BURNMOD2860Percent of basin burned at moderate severitypercentpercent
BURNSLP302862P​ercent of the entire basin area with slopes GE30 percent and burned at high, mod and low severitypercentpercent
CANOPY_PCT1865Percentage of drainage area covered by canopy as described in OK SIR 2009_5267percentpercent
CARBADJUST1286Binary variable for Western Maryland low-flow equations equals 1 if CARBON greater than 40 percent and zero otherwisedimensionlessdimensionless
CARBON137Percentage of area of carbonate rockpercentpercent
CB01BARE2471Percent barren from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01CRPHAY2467Percent cultivated crops and hay from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01DEV2465Percent developed from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01FORSHB2466Percent forests and shrub lands from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01HERB2468Percent herbaceous from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01WATER2469Percent open water from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01WETLND2470Percent wetlands 2001 Chesapeake Bay land cover datasetpercentpercent
CB06BARE2478Percent barren from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06CRPHAY2474Percent cultivated crops and hay from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06DEV2472Percent developed 2006 Chesapeake Bay land cover datasetpercentpercent
CB06FORSHB2473Percent forests and shrub lands from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06HERB2475Percent herbaceous from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06WATER2476Percent water from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06WETLND2477Percent wetlands from 2006 Chesapeake Bay land cover datasetpercentpercent
CCM1757Constant of channel maintenance computed as drainage area divided by total stream lengthsquare mile per milekm2 per km
CELVBLUE62Average of outlet elevation and the elevation at the upstream extent of the mapped streamfeetm
CELVMEAN131Mean elevation along the main channelfeetm
CENTROIDX2166Basin centroid horizontal (x) location in state plane coordinatesState plane coordinatesState plane coordinates
CENTROIDY2167Basin centroid vertical (y) location in state plane unitsState plane coordinatesState plane coordinates
CENTROXRI2367Basin centroid horizontal (x) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CENTROYRI2368Basin centroid vertical (y) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CF68Climate factor for areadimensionlessdimensionless
CH92_01DEV2315Percent Difference between 1992 and 2001 area covered by developed land using NLCDpercentpercent
CH92_01FOR2314Percent Difference between 1992 and 2001 area covered by forest using NLCDpercentpercent
CHANCOND61Condition between points 100- 75- 50- and 25-percent along main channel - 2 if entirely paved - 1 if unpaveddimensionlessdimensionless
CHSWAMP151Percentage of area of main channel swampspercentpercent
CIRC_RATIO1428Circularity Ratiodimensionlessdimensionless
CLENBLUE88Length of main channel shown as blue line on a topographic mapmileskm
CLIMFAC2YR2066Two-year climate factor from Lichy and Karlinger (1990)dimensionlessdimensionless
COASTDIST1292Shortest distance from the coastline to the basin centroidmileskm
COMMD972241Percent area of commercial land use from Maryland Dept of Planning 1997 land-use datapercentpercent
COMPRAT69A measure of basin shape related to basin perimeter and drainage areadimensionlessdimensionless
CONIF1304Percentaqe of land surface covered by coniferous forestpercentpercent
CONTDA70Area that contributes flow to a point on a streamsquare mileskm2
CONTOUR2900Total length of all elevation contours in drainage area from 1:24K mappingmileskm
CONTROL140Percent of basin controlled by lakes swamps and reservoirspercentpercent
CONTROLLED1578Percent of basin controlled by lakes swamps and reservoirs - see WRIR 00 4189percentpercent
CONVEY65Conveyance of main stream channel at bank-full conditionscubic feet per secondm3 per second
COUNTY11County code dimensionlessdimensionless
CPSED2449Percent area of sedimentary rockswithin the Coastal Plain Physiographic Regionpercentpercent
CROPS2642Percent of basin area covered by agricultural landpercentpercent
CRSDFT138Percentage of area of coarse-grained stratified driftpercentpercent
CRSTILL139Percentage of area of coarse tillpercentpercent
CSL10_85166Change in elevation divided by length between points 10 and 85 percent of distance along main channel to basin divide - main channel method not knownfeet per mim per km
CSL10_85fm1358Change in elevation between points 10 and 85 percent of length along main channel to basin divide divided by length between points ft per mifeet per mim per km
CSL1085LFP1574Change 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 gridfeet per mim per km
CSL1085LO2093Change in elevation between points 10 and 85 percent of length along the lower half of the longest flow path divided by length between the pointsfeet per mim per km
CSL1085RAW2841Main channel slope computed by the 10 and 85 method, unadjusted for biasfeet per mim per km
CSL1085UP2094Change in elevation between points 10 and 85 percent of length along the upper half of the longest flow path divided by length between the pointsfeet per mim per km
CSLArc101224Average stream slope determined using ArcHydro Tools and 10 meter DEM - computes average of slopes from all elevation grid cells along the blue linefeet per mim per km
CSLBlue167Change in elevation of the longest blue-line stream (not extended to the boundary) divided by stream lengthfeet per mim per km
CSLBlue_ff2078Change in elevation of the longest blue-line stream divided by stream lengthfeet per footm per m
DA10001268Drainage area divided by 1000square mileskm2
DATUM22Datum used to determine the site coordinatesdimensionlessdimensionless
DAUNREG1346Unregulated drainage area used in OK regulated equationssquare mileskm2
DECAVPRE129Mean December Precipitationinchesmm
DECAVTMP130Mean December Temperaturedegrees Fdegrees C
DESMOIN72Area underlain by Des Moines Lobepercentpercent
DETEN148Percentage of area of lakes and detention basinspercentpercent
DEVNLCD011228Percentage of land-use categories 21-24 from NLCD 2001percentpercent
DEVNLCD922605Percentage of developed land-use categories 21-23 from NLCD 1992percentpercent
DINTNLCD011229Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2001percentpercent
DIRECT13Directions dimensionlessdimensionless
DISTANCE0Distance from Ungaged Stationmileskm
DISTRICT24Code of the state where the station is located.dimensionlessdimensionless
DMARMAXTMP136Normal Daily Maximum March Temperaturedegrees Fdegrees C
DRFTPERSTR165Area of stratified drift per unit of stream lengthsquare mile per milekm2 per km
DRN2165Drainage quality (1=well drained to 7=poorly drained) from dataset at http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xmldimensionlessdimensionless
DRNAREA73Area that drains to a point on a streamsquare mileskm2
DRNDENSITY1804Basin drainage density defined as total stream length divided by drainage area.miles per square milekm per km2
DRNFREQ75Number of first order streams per square mile of drainage areaper square mileper km2
DURREG17Flow-Duration Hydrologic Region code dimensionlessdimensionless
DV_OF_DA1796Developed Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035percentpercent
EFFECTDA76Total drainage area minus area upstream from erosion-control and flood-retention structuressquare mileskm2
EL12001184Percentage of basin at or above 1200 ft elevationpercentpercent
EL20002247Percent of basin area that is above 2000 feet elevationpercentpercent
EL500078Percent of area above 5000 ftpercentpercent
EL600079Percent of area above 6000 ftpercentpercent
EL70002309Percent of area above 7000 ftfeetm
EL75001350Percent of area above 7500 ftpercentpercent
ELEV103Mean Basin Elevationfeetm
ELEV10001188Elevation in Thousandsthousand feetkilometer
ELEV10FT1900Elevation at 10 percent from outlet along longest flow path slope using DEMfeetm
ELEV10FT3D1901Elevation at 10 percent from outlet along longest flow path slope using 3D linefeetm
ELEV85FT1902Elevation at 85 percent from outlet along longest flow path slope using DEMfeetm
ELEV85FT3D1903Elevation at 85 percent from outlet along longest flow path slope using 3D linefeetm
ELEVMAX93Maximum basin elevationfeetm
ELONGRATIO1751Elongation Ratiodimensionlessdimensionless
ELV10_8577Average of channel elevations at points 10- and 85- percent above gage - Equivalent to Altitude Indexfeetm
END_REC1209Last day of recorddaysdays
ET0306MOD2590Spring (March-June) mean monthly evapotranspiration (2001-2011), MODISinchesmm
ET0710MOD2591Summer (July-October) mean monthly evapotranspiration (2001-2011), MODISinchesmm
EVAP94Mean Annual Lake Evaporationinchesmm
EVAPAN95Mean Annual Pan Evaporationinchesmm
FEBAVPRE110Mean February Precipitationinchesmm
FEBAVTMP111Mean February Temperaturedegrees Fdegrees C
FINMOR141Percentage of area of end moraine fine tillpercentpercent
FIRSTYEAR1359Year in which record was first collected or used for analysisyearsyears
FOREST142Percentage of area covered by forestpercentpercent
FOREST_MD2229Percent forest from Maryland 2010 land-use datapercentpercent
FORESTp11189Percent Forest plus 1 (ID ROI Parm)dimensionlessdimensionless
FORMD972243Percent area of forest from Maryland Dept of Planning 1997 land-use datapercentpercent
FORWET2644Percentage of land covered by forested wetlands - source not specifiedpercentpercent
FOSTREAM1761Number of first order streams determined using the Strahler stream ordering systemdimensionlessdimensionless
FROST112Mean frost depth on February 28inchesmm
GA_PKREG12480Georgia Peak Flow Region 1 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG22481Georgia Peak Flow Region 2 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG32482Georgia Peak Flow Region 3 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG42483Georgia Peak Flow Region 4 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG52484Georgia Peak Flow Region 5 from SIR 2009-5043dimensionlessdimensionless
GENRO80Generalized mean annual runoff in Minnesota 1951-85dimensionlessdimensionless
GEOFACTVT1400Northing of the centroid of the drainage basin in the Vermont State Plane coordinate system divided by 100000 then increased by 1dimensionlessdimensionless
GEOFACTWY81Geographic factor for Wyoming from plate 1 of Lohman (1988)dimensionlessdimensionless
GLACIATED1573Percentage of basin area that was historically covered by glacierspercentpercent
GLACIER143Percentage of area of Glacierspercentpercent
GRUN2877Mean annual groundwater runoffinchesmm
GRUN07112878Mean annual dry season groundwater runoff, July through Novemberinchesmm
GRUN12062879Mean annual wet season groundwater runoff, December through Juneinchesmm
GUTTER83Length of gutters per square mile of drainage areamiles per square milekm per km2
GWHEAD82Mean - minimum basin elevationfeetm
HCDN2009175Station is part of the 2009 Hydro-Climatic Data Network (http://water.usgs.gov/GIS/metadata/usgswrd/XML/gagesII_Sept2011.xml) when 'Yes', else ‘No'Yes or NoYes or No
HIELONGRAT1793Ratio of (1)diameter of circle with equal area as basin to (2)basin length, as defined in SIR 2004-5262dimensionlessdimensionless
HIGHEQU19Indicates whether the site was used to develop high-flow regression equations Yes or NoYes or No
HIGHREG15High-Flow Hydrologic Region code dimensionlessdimensionless
HIMARRATE1794Mean annual rainfall rate determined based on the method described in SIR 2004-5262cubic feet per secondm3 per second
HIRAINRATE1750Maximum Weighted Rainfall Ratecubic feet per secondm3 per second
HOMDEN20001355Housing density from 2000 census datahomes per acrehomes per km2
HOMDENCYR1354Housing density for centroid year of streamflow data collectionhomes per acrehomes per km2
HOMEDENS1348Average homes per acre in watershedhomes per acrehomes per km2
HUC9Hydrologic Unit Number dimensionlessdimensionless
HYPSO2238Single-valued index equal to the ratio of the area under the normalized hypsometric curvedimensionlessdimensionless
I24H100Y33Maximum 24-hour precipitation that occurs on average once in 100 yearsinchesmm
I24H10Y30Maximum 24-hour precipitation that occurs on average once in 10 yearsinchesmm
I24H200Y2898Maximum 24-hour precipitation that occurs on average once in 200 yearsinchesmm
I24H25Y31Maximum 24-hour precipitation that occurs on average once in 25 yearsinchesmm
I24H2Y29Maximum 24-hour precipitation that occurs on average once in 2 years - Equivalent to precitation intensity indexinchesmm
I24H500Y1931Maximum 24-hour precipitation that occurs on average once in 500 yearsinchesmm
I24H50Y32Maximum 24-hour precipitation that occurs on average once in 50 yearsinchesmm
I24H5Y1930Maximum 24-hour precipitation that occurs on average once in 5 yearsinchesmm
I24MAX28Maximum 24-hour precipitation for period of recordinchesmm
I2H2Y35Maximum 2-hour precipitation that occurs on average once in 2 yearsinchesmm
I48H100Y1935Maximum 48-hour precipitation that occurs on average once in 100 yearsinchesmm
I48H10Y1932Maximum 48-hour precipitation that occurs on average once in 10 yearsinchesmm
I48H25Y1933Maximum 48-hour precipitation that occurs on average once in 25 yearsinchesmm
I48H2Y1885Maximum 48-hour precipitation that occurs on average once in 2 yearsinchesmm
I48H500Y1936Maximum 48-hour precipitation that occurs on average once in 500 yearsinchesmm
I48H50Y1934Maximum 48-hour precipitation that occurs on average once in 50 yearsinchesmm
I48H5Y1886Maximum 48-hour precipitation that occurs on average once in 5 yearsinchesmm
I60M100Y1922Maximum 60-min precipitation that occurs on average once in 100 yearsinchesmm
I60M10Y1919Maximum 60-min precipitation that occurs on average once in 10 yearsinchesmm
I60M25Y1920Maximum 60-min precipitation that occurs on average once in 25 yearsinchesmm
I60M2Y1917Maximum 60-min precipitation that occurs on average once in 2 yearsinchesmm
I60M500Y1923Maximum 60-min precipitation that occurs on average once in 500 yearsinchesmm
I60M50Y1921Maximum 60-min precipitation that occurs on average once in 50 yearsinchesmm
I60M5Y1918Maximum 60-min precipitation that occurs on average once in 5 yearsinchesmm
I6H100Y18566-hour precipitation that is expected to occur on average once in 100 yearsinchesmm
I6H10Y1926Maximum 6-hour precipitation that occurs on average once in 10 yearsinchesmm
I6H25Y1927Maximum 6-hour precipitation that occurs on average once in 25 yearsinchesmm
I6H2Y1924Maximum 6-hour precipitation that occurs on average once in 2 yearsinchesmm
I6H500Y1929Maximum 6-hour precipitation that occurs on average once in 500 yearsinchesmm
I6H50Y1928Maximum 6-hour precipitation that occurs on average once in 50 yearsinchesmm
I6H5Y1925Maximum 6-hour precipitation that occurs on average once in 5 yearsinchesmm
ILREG11261Indicator variable for IL region 1, enter 1 if site is in region 1 else 0dimensionlessdimensionless
ILREG31262Indicator variable for IL region 3, enter 1 if site is in region 3 else 0dimensionlessdimensionless
ILREG51263Indicator variable for IL region 5, enter 1 if site is in region 5 else 0dimensionlessdimensionless
ILREG61288Indicator variable for IL region 6, enter 1 if site is in region 6 else 0dimensionlessdimensionless
ILREG71289Indicator variable for IL region 7, enter 1 if site is in region 7 else 0dimensionlessdimensionless
IMPERV146Percentage of impervious areapercentpercent
IMPERVNOAA2857NOAA 1 km Sprawl impervious surfaces grid http://ngdc.noaa.gov/eog/others/download_sprawl.htmlpercentpercent
IMPMD972245Percent area of impervious surfaces from Maryland Dept of Planning 1997 land-use datapercentpercent
IMPNLCD011226Percentage of impervious area determined from NLCD 2001 impervious datasetpercentpercent
IRRIGAT_MT2904Percent of basin that is irrigated based on Montana Final Land Unit (FLU) classificationpercentpercent
ISOLAKE2479Percentage of land area that drains to lakes and ponds that are not connected to the stream network, from 1:24,000 scale DRG datapercentpercent
ISOLAKEDA2512Percent of the drainage area that drains to and includes isolated lakes and ponds from 1:24K DRGspercentpercent
JANAVPRE107Mean January Precipitationinchesmm
JANAVTMP108Mean January Temperaturedegrees Fdegrees C
JANMAXPRE2858Average maximum January Temperature from 2KM resolution PRISM, 30-year average daily (1961-1990) http://www.climatesource.com/inchesmm
JANMAXT2K2895Mean Maximum January Temperature from 2K resolution PRISM 1961-1990 datadegrees Fdegrees C
JANMAXTMP1259Mean Maximum January Temperaturedegrees Fdegrees C
JANMINPRE2859Average minimum January Temperature from 2KM resolution PRISM, 30-year average daily (1961-1990) http://www.climatesource.com/inchesmm
JANMINT2K2896Mean Minimum January Temperature from 2K resolution PRISM 1961-1990 datadegrees Fdegrees C
JANMINTMP109Mean Minimum January Temperaturedegrees Fdegrees C
JULAVPRE120Mean July Precipitationinchesmm
JULYAVEPRE1864Mean July Precipitationdimensionlessdimensionless
JULYAVTMP121Mean July Temperaturedegrees Fdegrees C
JULYMAXTMP122Mean Maximum July Temperaturedegrees Fdegrees C
JULYMINTMP1260Mean Minumum July Temperaturedegrees Fdegrees C
JUNAVPRE118Mean June Precipitationinchesmm
JUNEAVPRE1863Mean June Precipitationdimensionlessdimensionless
JUNEAVTMP119Mean June Temperaturedegrees Fdegrees C
JUNMAXTMP2871Mean Maximum June Temperaturedegrees Fdegrees C
LAGFACTOR1771Lag Factor as defined in SIR 2006-5112dimensionlessdimensionless
LAKEAREA149Percentage of Lakes and Pondspercentpercent
LAKESNHDH2905Percent of basin in lakes, ponds, and reservoirs fom high resolution National Hydrography Datasetpercentpercent
LAKESNWI2845Percentage of lakes and ponds as determined from the National Wetlands Inventory (2001)percentpercent
LAKESp11192Percent Lakes plus 1 (MN ROI Parm)dimensionlessdimensionless
LASTYEAR1360Year in which record was last collected or used for analysisyearsyears
LAT_CENT84Latitude of Basin Centroiddecimal degreesdecimal degrees
LAT_GAGE7Latitudedecimal degreesdecimal degrees
LAT_NHD1207Latitude of station location on National Hydrography Datasetdegreesdegrees
LAT_OUT1197Latitude of Basin Outletdegreesdegrees
LC01AIMP1225Impervious area determined from NLCD 2001 impervious datasetsquare mileskm2
LC01BARE1911Percentage of area barren land, NLCD 2001 category 31percentpercent
LC01CROP1913Percentage of area cultivated crops, NLCD 2001 category 82percentpercent
LC01CRPHAY2454Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2001percentpercent
LC01DEV2856Percentage of land-use from NLCD 2001 classes 21-24percentpercent
LC01DEVHI1910Percentage of area developed, high intensity, NLCD 2001 category 24percentpercent
LC01DEVMD1909Percentage of area developed, medium intensity, NLCD 2001 category 23percentpercent
LC01EVERG1912Percentage of area evergreen forest, NLCD 2001 category 42percentpercent
LC01FOREST2310Percentage of forest from NLCD 2001 classes 41-43percentpercent
LC01FORSHB2455Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2001percentpercent
LC01HERB2311Percentage of herbaceous upland from NLCD 2001 class 71percentpercent
LC01IMP2458Percentage of impervious land cover from NLCD 2001percentpercent
LC01OPNLO1908Percentage of area developed, open space and low intensity combined, NLCD2001 cat. 21 and 22percentpercent
LC01SHRUB2868Percentage of shrub scrub from NLCD 2001 class 52percentpercent
LC01WATER2456Percentage of open water, class 11, from NLCD 2001percentpercent
LC01WETLND2457Percentage of wetlands, classes 90 and 95, from NLCD 2001percentpercent
LC06ABARE2290Area of barren from NLCD 2006 class 31square mileskm2
LC06ACROP2304Area of area of cultivated crops from NLCD 2006 class 82square mileskm2
LC06ADECID2291Area of deciduous forest from NLCD 2006 class 41square mileskm2
LC06ADEV2284Area of developed land-use from NLCD 2006 classes 21-24square mileskm2
LC06ADEVHI2288Area of developed land, high intensity, NLCD 2006 class 24square mileskm2
LC06ADEVLO2286Area of developed land, low intensity, from NLCD 2006 class 22square mileskm2
LC06ADEVMD2287Area of developed land, medium intensity, NLCD 2006 class 23square mileskm2
LC06ADVOPN2285Area of developed open land from NLCD 2006 class 21square mileskm2
LC06ADWARF2295Area of dwarf scrub from NLCD 2006 class 51square mileskm2
LC06AEMWET2307Area of area of emergent herbaceous wetlands from NLCD 2006 class 95square mileskm2
LC06AEVERG2292Area of evergreen forest from NLCD 2006 class 42square mileskm2
LC06AFORES2294Area of forest from NLCD 2006 classes 41-43square mileskm2
LC06AGRASS2298Area of grassland from NLCD 2006 class 71square mileskm2
LC06AGRI2366Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82percentpercent
LC06AHERB2302Area of herbaceous from NLCD 2006 classes 71-74square mileskm2
LC06AIMP2279Area of impervious land surface determined from NLCD 2006 impervious datasetsquare mileskm2
LC06ALICHN2300Area of lichens from NLCD 2006 class 73square mileskm2
LC06ALTFOR2364Percentage of forested land area from NLCD2006 classes 22, 41-43 and 90percentpercent
LC06AMOSS2301Area of moss from NLCD 2006 class 74square mileskm2
LC06AMXFOR2293Area of mixed deciduous and evergreen forest from NLCD 2006 class 43square mileskm2
LC06AOPNLO2289Area of developed land, open space and low intensity combined, NLCD2006 classes 21 and 22square mileskm2
LC06APAST2303Area of area of pasture area from NLCD 2006 class 81square mileskm2
LC06APLANT2305Area of planted area from NLCD 2006 classes 81 and 82square mileskm2
LC06ASCRUB2297Area of scrub from NLCD 2006 classes 51 and 52square mileskm2
LC06ASEDGE2299Area of sedge from NLCD 2006 class 72square mileskm2
LC06ASHRUB2296Area of shrub scrub from NLCD 2006 class 52square mileskm2
LC06ASNOIC2283Area of snow and ice from NLCD 2006 class 12square mileskm2
LC06ASTOR2282Area of water bodies and wetlands determined from the NLCD 2006 classes 11, 90 and 95square mileskm2
LC06AWATER2280Area of water from NLCD 2006 class 11square mileskm2
LC06AWATWT2281Area open water and herbaceous wetland from NLCD 2006 classes 11 and 95square mileskm2
LC06AWDWET2306Area of area of wooded wetlands from NLCD 2006 class 90square mileskm2
LC06AWETL2308Area of wetlands from NLCD 2006 classes 90 and 95square mileskm2
LC06BARE2260Percentage of barren from NLCD 2006 class 31percentpercent
LC06BARSCB2365Percentage of barren and scrub land from NLCD classes 31, 51, and 52percentpercent
LC06CROP2274Percentage of area of cultivated crops from NLCD 2006 class 82percentpercent
LC06CRPHAY2459Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2006percentpercent
LC06DECID2261Percentage of deciduous forest from NLCD 2006 class 41percentpercent
LC06DEV2253Percentage of land-use from NLCD 2006 classes 21-24percentpercent
LC06DEVHI2255Percentage of area developed, high intensity, NLCD 2006 class 24percentpercent
LC06DINT2259Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2006percentpercent
LC06DVLO2254Percentage of developed area, low intensity, from NLCD 2006 class 22percentpercent
LC06DVLOMD2872Percentage of developed area, low and medium intensity, from NLCD 2006 classes 22 and 23percentpercent
LC06DVMD2256Percentage of area developed, medium intensity, NLCD 2006 class 23percentpercent
LC06DVMDHI2363Percentage of area developed, medium and high intensity, NLCD 2006 classes 23 and 24percentpercent
LC06DVOPN2257Percentage of developed open area from NLCD 2006 class 21percentpercent
LC06DWARF2265Percentage of dwarf scrub from NLCD 2006 class 51percentpercent
LC06EMWET2277Percentage of area of emergent herbaceous wetlands from NLCD 2006 class 95percentpercent
LC06EVERG2262Percentage of evergreen forest from NLCD 2006 class 42percentpercent
LC06FOREST2264Percentage of forest from NLCD 2006 classes 41-43percentpercent
LC06FORSHB2460Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2006percentpercent
LC06GRASS2268Percentage of grassland from NLCD 2006 class 71percentpercent
LC06HERB2272Percentage of herbaceous from NLCD 2006 classes 71-74percentpercent
LC06IMP2248Percentage of impervious area determined from NLCD 2006 impervious datasetpercentpercent
LC06LICHEN2270Percentage of lichens from NLCD 2006 class 73percentpercent
LC06MIXFOR2263Percentage of mixed deciduous and evergreen forest from NLCD 2006 class 43percentpercent
LC06MOSS2271Percentage of moss from NLCD 2006 class 74percentpercent
LC06OPNLO2258Percentage of area developed, open space and low intensity combined, NLCD2006 classes 21 and 22percentpercent
LC06PAST2273Percentage of area of pasture area from NLCD 2006 class 81percentpercent
LC06PLANT2275Percentage of planted area from NLCD 2006 classes 81 and 82percentpercent
LC06SCRUB2267Percentage of scrub from NLCD 2006 classes 51 and 52percentpercent
LC06SEDGE2269Percentage of sedge from NLCD 2006 class 72percentpercent
LC06SHRUB2266Percentage of shrub scrub from NLCD 2006 class 52percentpercent
LC06SNOIC2252Percent snow and ice from NLCD 2006 class 12percentpercent
LC06STOR2251Percentage of water bodies and wetlands determined from the NLCD 2006percentpercent
LC06WATER2249Percent of open water, class 11, from NLCD 2006percentpercent
LC06WATWET2250Percent open water and herbaceous wetland from NLCD 2006 classes 11 and 95percentpercent
LC06WDWET2276Percentage of area of wooded wetlands from NLCD 2006 class 90percentpercent
LC06WETLND2462Percentage of wetlands, classes 90 and 95, from NLCD 2006percentpercent
LC11ABARE2773Area of barren from NLCD 2011 class 31square mileskm2
LC11ACROP2774Area of area of cultivated crops from NLCD 2011 class 82square mileskm2
LC11ADECID2775Area of deciduous forest from NLCD 2011 class 41square mileskm2
LC11ADEV2776Area of developed land-use from NLCD 2011 classes 21-24square mileskm2
LC11ADEVHI2777Area of developed land, high intensity, NLCD 2011 class 24square mileskm2
LC11ADEVLO2778Area of developed land, low intensity, from NLCD 2011 class 22square mileskm2
LC11ADEVMD2779Area of developed land, medium intensity, NLCD 2011 class 23square mileskm2
LC11ADVOPN2780Area of developed open land from NLCD 2011 class 21square mileskm2
LC11ADWARF2781Area of dwarf scrub from NLCD 2011 class 51square mileskm2
LC11AEMWET2782Area of area of emergent herbaceous wetlands from NLCD 2011 class 95square mileskm2
LC11AEVERG2783Area of evergreen forest from NLCD 2011 class 42square mileskm2
LC11AFORES2784Area of forest from NLCD 2011 classes 41-43square mileskm2
LC11AGRASS2785Area of grassland from NLCD 2011 class 71square mileskm2
LC11AGRI2786Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82percentpercent
LC11AHERB2787Area of herbaceous from NLCD 2011 classes 71-74square mileskm2
LC11AIMP2788Area of impervious land surface determined from NLCD 2011 impervious datasetsquare mileskm2
LC11ALICHN2789Area of lichens from NLCD 2011 class 73square mileskm2
LC11ALTFOR2790Percentage of forested land area from NLCD2011 classes 22, 41-43 and 90percentpercent
LC11AMOSS2791Area of moss from NLCD 2011 class 74square mileskm2
LC11AMXFOR2792Area of mixed deciduous and evergreen forest from NLCD 2011 class 43square mileskm2
LC11AOPNLO2793Area of developed land, open space and low intensity combined, NLCD2011 classes 21 and 22square mileskm2
LC11APAST2794Area of area of pasture area from NLCD 2011 class 81square mileskm2
LC11APLANT2795Area of planted area from NLCD 2011 classes 81 and 82square mileskm2
LC11ASCRUB2796Area of scrub from NLCD 2011 classes 51 and 52square mileskm2
LC11ASEDGE2797Area of sedge from NLCD 2011 class 72square mileskm2
LC11ASHRUB2798Area of shrub scrub from NLCD 2011 class 52square mileskm2
LC11ASNOIC2799Area of snow and ice from NLCD 2011 class 12square mileskm2
LC11ASTOR2800Area of water bodies and wetlands determined from the NLCD 2011 classes 11, 90 and 95square mileskm2
LC11AWATER2801Area of water from NLCD 2011 class 11square mileskm2
LC11AWATWT2802Area open water and herbaceous wetland from NLCD 2011 classes 11 and 95square mileskm2
LC11AWDWET2803Area of area of wooded wetlands from NLCD 2011 class 90square mileskm2
LC11AWETL2804Area of wetlands from NLCD 2011 classes 90 and 95square mileskm2
LC11BARE2805Percentage of barren from NLCD 2011 class 31percentpercent
LC11BARSCB2806Percentage of barren and scrub land from NLCD classes 31, 51, and 52percentpercent
LC11CROP2807Percentage of area of cultivated crops from NLCD 2011 class 82percentpercent
LC11CRPHAY2808Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2011percentpercent
LC11DECID2809Percentage of deciduous forest from NLCD 2011 class 41percentpercent
LC11DEV2676Percentage of developed (urban) land from NLCD 2011 classes 21-24percentpercent
LC11DEV2810Percentage of land-use from NLCD 2011 classes 21-24percentpercent
LC11DEVHI2811Percentage of area developed, high intensity, NLCD 2011 class 24percentpercent
LC11DINT2812Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2011percentpercent
LC11DVLO2813Percentage of developed area, low intensity, from NLCD 2011 class 22percentpercent
LC11DVMD2814Percentage of area developed, medium intensity, NLCD 2011 class 23percentpercent
LC11DVMDHI2815Percentage of area developed, medium and high intensity, NLCD 2011 classes 23 and 24percentpercent
LC11DVOPN2816Percentage of developed open area from NLCD 2011 class 21percentpercent
LC11DWARF2817Percentage of dwarf scrub from NLCD 2011 class 51percentpercent
LC11EMWET2818Percentage of area of emergent herbaceous wetlands from NLCD 2011 class 95percentpercent
LC11EVERG2819Percentage of evergreen forest from NLCD 2011 class 42percentpercent
LC11FOREST2820Percentage of forest from NLCD 2011 classes 41-43percentpercent
LC11FORSHB2821Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2011percentpercent
LC11GRASS2822Percentage of grassland from NLCD 2011 class 71percentpercent
LC11HERB2823Percentage of herbaceous from NLCD 2011 classes 71-74percentpercent
LC11IMP2772Percentage of impervious area determined from NLCD 2011 impervious datasetpercentpercent
LC11LICHEN2825Percentage of lichens from NLCD 2011 class 73percentpercent
LC11MIXFOR2826Percentage of mixed deciduous and evergreen forest from NLCD 2011 class 43percentpercent
LC11MOSS2827Percentage of moss from NLCD 2011 class 74percentpercent
LC11OPNLO2828Percentage of area developed, open space and low intensity combined, NLCD2011 classes 21 and 22percentpercent
LC11PAST2829Percentage of area of pasture area from NLCD 2011 class 81percentpercent
LC11PLANT2830Percentage of planted area from NLCD 2011 classes 81 and 82percentpercent
LC11SCRUB2831Percentage of scrub from NLCD 2011 classes 51 and 52percentpercent
LC11SEDGE2832Percentage of sedge from NLCD 2011 class 72percentpercent
LC11SHRUB2833Percentage of shrub scrub from NLCD 2011 class 52percentpercent
LC11SNOIC2834Percent snow and ice from NLCD 2011 class 12percentpercent
LC11STOR2835Percentage of water bodies and wetlands determined from the NLCD 2011percentpercent
LC11WATER2836Percent of open water, class 11, from NLCD 2011percentpercent
LC11WATWET2837Percent open water and herbaceous wetland from NLCD 2011 classes 11 and 95percentpercent
LC11WDWET2838Percentage of area of wooded wetlands from NLCD 2011 class 90percentpercent
LC11WETLND2839Percentage of wetlands, classes 90 and 95, from NLCD 2011percentpercent
LC92FOREST2312Percentage of forest from NLCD 1992 classes 41-43percentpercent
LC92STOR1352Percentage of water bodies and wetlands determined from the NLCDpercentpercent
LENGTH89Length along the main channel from the measuring location extended to the basin dividemileskm
LFPLENGTH1904Length of longest flow pathmileskm
LIME150Percentage of area of limestone geologypercentpercent
LNG_GAGE8Longitudedecimal degreesdecimal degrees
LOESSDEP86Depth of loess depositsfeetm
LOGDA1857Logarithm base 10 of drainage areaLog base 10Log base 10
LOGDA10001265Log of drainage area divided by 1000Log base 10Log base 10
LOGPREC281267Log of mean annual precipitation from PRISM divided by 28inchesmm
LONG_CENT87Longitude Basin Centroiddecimal degreesdecimal degrees
LONGESTFP2092Longest distance along stream from site of interest to top of basinmileskm
LONG_OUT1198Longitude of Basin Outletdegreesdegrees
LON_NHD1206Longitude of station location on National Hydrography Datasetdegreesdegrees
LOWEQU20Indicates whether the site was used to develop low-flow regression equations Yes or NoYes or No
LOWREG16Low-Flow Hydrologic Region code dimensionlessdimensionless
LSTPERM85Permeability of least permeable layerinches per hourmm per hr
LU12168Index based on the sum of land use types I and II in Portland-Vancouver WAsquare mileskm2
LU92BARE1431Percent Barren from NLCD1992percentpercent
LU92DEV1430Percent Developed from NLCD92percentpercent
LU92FORUP1432Percent Forested Upland from NLCD1992percentpercent
LU92HRBC1434Percent Cultivated Herbaceous Upland from NLCD1992percentpercent
LU92HRBN1433Percent Natural Herbaceous Upland from NLCD1992percentpercent
LU92PLANT2869Percentage of planted area from NLCD 1992 classes 81 and 82percentpercent
LU92WATER1429Percent Water from NLCD1992percentpercent
LU92WETLN1435Percent Wetland from NLCD1992percentpercent
MAJ_ROADS2902Length of non-state major roads in basinmileskm
MAPM1440Mean Annual Precip Basin Averageinchesmm
MAR1710Mean annual runoff for the period of record in inchesinchesmm
MAR14D10Y170414-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR14D20Y170514-day eman annual runoff that occurs on average once in 20 yearsinchesmm
MAR14D2Y170214-day mean annual runoff that occurs on average once in 2 yearsinchesmm
MAR14D50Y170614-day mean annual runoff that occurs on average once in 50 yearsinchesmm
MAR14D5Y170314-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MAR1D10Y16871-day mean annual funoff that occurs on average once in 10 yearsinchesmm
MAR1D20Y16881-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR1D2Y16851-day mean annual runoff that occurs on average once in 2 years.inchesmm
MAR1D50Y16891-day mean annual runoff that occurs on aberage once in 50 years.inchesmm
MAR1D5Y16861-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MAR30D10Y170930-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR30D2Y170730-day mean annual runoff that occurs on average once in 2 yearsinchesmm
MAR30D5Y170830-day man annual runoff that occurs on average once in 5 yearsinchesmm
MAR3D10Y16923-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR3D20Y16933-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR3D2Y16903-daymean annual runoff that occurs on average once in 2 yearsinchesmm
MAR3D50Y16943-day mean annual runoff that occurs on average once in 50 years.inchesmm
MAR3D5Y16913_Day_5_Year_Mean_Annual_Runoffinchesmm
MAR4D3Y16954_Day_3_Year_Mean_Annual_Runoffinchesmm
MAR7D10Y16997-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR7D20Y17007-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR7D2Y16967-day mean annual runoff that occurs on avrage once in 2 yearsinchesmm
MAR7D50Y17017-day mean annual runoff that occurs on average once in 50 yearsinchesmm
MAR7D5Y16987-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MARAVPRE113Mean March Precipitationinchesmm
MARAVTMP114Mean March Temperaturedegrees Fdegrees C
MARCFSM1766Mean annual runoff for the period of record in cubic feet persecondcubic feet per second per square milecubic meters per second per square kilometer
MAREGION1402Region of Massachusetts 0 for Eastern 1 for Westerndimensionlessdimensionless
MARMAXTMP115Mean Maximum March Temperaturedegrees Fdegrees C
MAXBSLOPD1807Maximum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data.degreesdegrees
MAXTEMP1803Mean annual maximum air temperature over basin area from PRISM 1971-2000 800-m griddegrees Fdegrees C
MAXTEMPC2897Mean annual maximum air temperature over basin area, in degrees Centigradedegreesdegrees
MAYAVPRE116Mean May Precipitationinchesmm
MAYAVTMP117Mean May Temperaturedegrees Fdegrees C
MCD12MCD Codedimensionlessdimensionless
MCSP1758Main channel slope proportion computed by Basinsoft as main channel length divided by the square root of the main channel slopedimensionlessdimensionless
MCSRBSFT1756Main-channel sinuosity ratio computed by Basinsoft as main channel length divided by basin lengthdimensionlessdimensionless
MDAREA2239Drainage area of the basin within the State of Marylandsquare mileskm2
MEDPREC133Median Annual Precipitationinchesmm
MEDTILL152Percentage of area of medium-textured glacial tillpercentpercent
MESZOIC2451Percent of area within the Mesozoic Basins percentpercent
MINBELEV135Minimum basin elevationfeetm
MINBSLOPD1806Minimum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data.degreesdegrees
MIN_ROADS2903Length of non-state minor roads in basinmileskm
MINTEMP1802Mean annual minimum air temperature over basin surface area as defined in SIR 2008-5126degrees Fdegrees C
MINTEMP_W2671Mean winter minimum air temperature over basin surface areadegrees Fdegrees C
MIXFOR1311Percentage of land area covered by mixed deciduous and coniferous forestpercentpercent
MONREG18Monthly and Annual Hydrologic Region code dimensionlessdimensionless
MORTILL1183Percentage of End Moraines of Fine-Textured Tillpercentpercent
MR30D2Y168330-day mean annual runoff that occurs on average once every two yearsinchesmm
MR7D10Y16827-day mean annual runoff that occurs on average once every 2 yearsinchesmm
MR7D2Y16817-day mean annual runoff that occurs on average once every 2 yearsinchesmm
MSTPERM1770Permeability of the most permeable layerinches per hourmm per hr
MUCK154Percentage of area of peat and muckpercentpercent
MXSNO177250th percentile of seasonal maximum snow depth from Northeast Regional Climate Center atlas by Cember and Wilks, 1993inchesmm
NCMR1711North Carolina mean annual runoffcubic feet per second per square milecubic meters per second per square kilometer
NDAY_REC1210Number of days of recorddaysdays
NDAYSGT01211Number of days with flow greater than zerodaysdays
NFSL301858North-Facing Slopes Greater Than 30 Percentpercentpercent
NFSL30_10M1854Percent area with north-facing slopes greater than 30 percent from 10-meter NED.percentpercent
NFSL30_30M1181Percent area with north-facing slopes greater than 30 percent from 30-meter DEM.percentpercent
NOFORWET2645Percentage of land area covered by non-forested wetlands - source not specifiedpercentpercent
NONCONTDA2844Area within the delineated basin that does not contribute to the flow at the outlet of the basinsquare mileskm2
NOVAVPRE127Mean November Precipitationinchesmm
NOVAVTMP128Mean November Temperaturedegrees Fdegrees C
NRCSPCT2854Percent of contributing drainage area regulated by NRCS floodwater-retarding structurespercentpercent
NYMAR2151New York mean annual runoff from Randall (1996)inchesmm
NY_UNDFLOW2674Rate of underflow downvalley through sand and gravel according to NY 2010-5063dimensionlessdimensionless
OCTAVPRE125Mean October Precipitationinchesmm
OCTAVTMP126Mean October Temperaturedegrees Fdegrees C
OHCLFAC1001438Ohio Climate Factor 100 Yeardimensionlessdimensionless
OHCLFAC21436Ohio Climate Factor 2 Yeardimensionlessdimensionless
OHCLFAC251437Ohio Climate Factor 25 Yeardimensionlessdimensionless
OH_INF_IND2068Index of relative infiltration from Koltun(1986)dimensionlessdimensionless
OHPHYSSECT1426Ohio Physiographic Sectionsdimensionlessdimensionless
OHREGA1193Ohio Region A Indicatordimensionlessdimensionless
OHREGC1194Ohio Region C Indicatordimensionlessdimensionless
OHREG_CODE1425Ohio Flood Region Letter Codedimensionlessdimensionless
OmegaEM2079Generalized regression residual as defined in TX SIR 2009-5087dimensionlessdimensionless
ORDOMISS1832Percent Surficial Geology as Ordovician and Mississippian Rockspercentpercent
OR_HIPERMA1801Percent basin surface area containing high permeability aquifer units as defined in SIR 2008-5126percentpercent
OR_HIPERMG1805Percent basin surface area containing high permeability geologic units as defined in SIR 2008-5126percentpercent
ORREG22866Indicator flag for Oregon region 2dimensionlessdimensionless
OTHEQU21Indicates whether the site was used to develop regression equations for other than high or low flowsYes or NoYes or No
OUTLETELEV1867Elevation of the stream outlet in thousands of feet above NAVD88.feetm
OUTLETX2168Basin outlet horizontal (x) location in state plane coordinatesState plane coordinatesState plane coordinates
OUTLETXRI2369Basin outlet horizontal (x) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
OUTLETY2169Basin outlet vertical (y) location in state plane coordinatesState plane coordinatesState plane coordinates
OUTLETYRI2370Basin outlet vertical (y) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
OUTPLETYA832603Basin outlet horizontal (Y) location in NAD 1983 AlbersNAD 1983 AlbersNAD 1983 Albers
OUTWASH153Percentage of area of outwashpercentpercent
PCLAY147Percentage of lacustrine clay and siltpercentpercent
PCTREG11876Percentage of drainage area located in Region 1percentpercent
PCTREG21877Percentage of drainage area located in Region 2percentpercent
PCTREG31878Percentage of drainage area located in Region 3percentpercent
PCTREG41879Percentage of drainage area located in Region 4percentpercent
PCTREG51880Percentage of drainage area located in Region 5percentpercent
PCTSNDGRV1752Percentage of land surface underlain by sand and gravel depositspercentpercent
PDIGMET2450Percent area of igneous and metamorphic within the Piedmont Physiographic Regionpercentpercent
PERM12IN1906Area-weighted average soil permeability for top 12 inches of soilinches per hourmm per hr
PERM24IN1907Area-weighted average soil permeability for top 24 inches of soilinches per hourmm per hr
PERMGTE2IN2065Percent of area underlain by soils with permeability greater than or equal to 2 inches per hourpercentpercent
PERMSSUR2386Area-weighted average soil permeability from NRCS SSURGO databaseinches per hourmm per hr
PERREC5Period of record yearsyears
PII_SD2771Maximum 24-hour precipitation that occurs on average once in 2 years minus 1.5 inchesinchesmm
PKDPTH101845Depth of the 10-year flood discharge in feet above the baseline_depth.feetm
PKDPTH1001848Depth of the 100-year flood discharge in feet above the baseline_depth.feetm
PKDPTH21844Depth of the 2-year flood discharge in feet above the baseline_depth.feetm
PKDPTH251846Depth of the 25-year flood discharge in feet above the baseline_depth.feetm
PKDPTH501847Depth of the 50-year flood discharge in feet above the baseline_depth.feetm
PKDPTH5001849Depth of the 500-year flood discharge in feet above the baseline_depth.feetm
PLCHSWAMP1403Percentage of the main channel length that flows through swampspercentpercent
POPDENS67Basin Population Densitypersons per square milepersons per km2
PRC11862Mean January Precipitationdimensionlessdimensionless
PRC41860Mean April Precipitationdimensionlessdimensionless
PRC81861Mean August Precipitationdimensionlessdimensionless
PRCWINTER1291Mean annual precipitation for December through Februaryinchesmm
PRDECFEB102651Basin average mean precipitation for December to February from PRISM 1981-2010inchesmm
PRDECFEB901347Basin average mean precipitation for December to February from PRISM 1961-1990inchesmm
PREBC01031307Mean annual precipitation of basin centroid for January 1 to March 15 winter periodinchesmm
PREBC_11122077Mean annual precipitation of basin centroid for November 1 to December 31 periodinchesmm
PREC07112873Mean annual dry season precipitation, July through Novemberinchesmm
PREC10to41305Mean precipitation for winter period defined as October to Aprilinchesmm
PREC12062874Mean annual wet season precipitation, December through Juneinchesmm
PRECIP96Mean Annual Precipitationinchesmm
PRECIP281266Mean annual precipitation from PRISM divided by 28inchesmm
PRECIPCENT1427Mean Annual Precip at Basin Centroidinchesmm
PRECIPOUT1866Mean annual precip at the stream outlet (based on annual PRISM precip data in inches from 1971-2000)inchesmm
PRECless351187Mean Annual Precip - 35 (LA ROI Parm)inchesmm
PRECPRIS002646Basin average mean annual precipitation for 1971 to 2000 from PRISMinchesmm
PRECPRIS102650Basin average mean annual precipitation for 1981 to 2010 from PRISMinchesmm
PREG_03_051310Mean precipitation at gaging station location for March 16 to May 31 spring periodinchesmm
PREG_06_101309Mean precipitation at gaging station location for June to October summer periodinchesmm
PREG_11_051868Mean monthly precipitation for November through May at the stream outletinchesmm
PREMARAPR2061Precipitation March-April basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRENOVAPR1836Precipitation November-April basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRENOVDEC1837Precipitation November-December basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRJUNAUG002899Mean seasonal precipitation June to August, basin average from PRISM 1971-2000inchesmm
PRMAYJUL902870Basin average mean precipitation for May to July from PRISM 1961-1990inchesmm
PRNOVAPR002447Precipitation November-April basin average, mean seasonal from PRISM 1971-2000inchesmm
PRNOVAPR902446Precipitation November-April basin average, mean seasonal from PRISM 1961-1990inchesmm
PROTECTED2865Percent of protected Federal and State owned land within the basinpercentpercent
PSFSLp11190Pct. South Facing Slopes plus 1 (ID ROI Parm)dimensionlessdimensionless
RCHRG_ANN2075Annual ground water recharge rateinchesmm
RCHRG_FAL2074Ground water recharge rate during fall season November 1 to December 31inchesmm
RCHRG_SPR2072Ground water recharge rate during spring season March 16 to May 31inchesmm
RCHRG_SUM2073Ground water recharge rate during summer season June 1 to October 31inchesmm
RCHRG_WIN2071Ground water recharge rate during winter season January 1 to March 15inchesmm
RCN162Runoff-curve number as defined by NRCS (http://policy.nrcs.usda.gov/OpenNonWebContent.aspx?content=17758.wba)dimensionlessdimensionless
RCNMD972246Runoff curve number determined from STATSGO soils and MD Dept of Planning 1997 land usedimensionlessdimensionless
REGULATE4Indicates whether flow at the site is affected by regulations or diversionsYes or NoYes or No
RELIEF160Maximum - minimum elevationfeetm
RELRELF159Basin relief divided by basin perimeterfeet per mim per km
REMARKS6Remarksdimensionlessdimensionless
RESMD972242Percent area of residential land use from Maryland Dept of Planning 1997 land-use datapercentpercent
ROCKDEP71Depth to rockfeetm
ROIREGN25ID for the radius of Influence regiondimensionlessdimensionless
ROTUND2361Rotundity computed as 0.785 times shape factor (SHAPE)dimensionlessdimensionless
ROTUNDBSFT1755Rotundity of basin from Basinsoft computed as 0.785 times shape factordimensionlessdimensionless
RSD2401Relative stream density first defined in SIR 2012_5171dimensionlessdimensionless
RUGGED1759Ruggedness number computed as stream density times basin relieffeet per mim per km
RUNCOEF161Soil runoff coefficient defined in Davis (1975)dimensionlessdimensionless
SANDGRAV1290Fraction of land surface underlain by sand and gravel depositsdimensionlessdimensionless
SANDGRAVAF2648Fraction of land surface underlain by sand and gravel aquifersdimensionlessdimensionless
SANDGRAVAP2647Percentage of land surface underlain by sand and gravel aquiferspercentpercent
SD_AS2850Percentage of Artesian Springs from Sando and others (2008)percentpercent
SD_ASLZ2851Percentage of Loss Zone/Artesian Springs from Sando and others (2008)percentpercent
SD_BHEXT2852Percentage of Black Hills Exterior from Sando and others (2008)percentpercent
SD_CC2849Percentage of Crystaline Core from Sando and others (2008)percentpercent
SD_LSTHW2848Percentage of Limestone Headwaters from Sando and others (2008)percentpercent
SD_LSTLZ2847Percentage of Limestone Loss Zone from Sando and others (2008)percentpercent
SD_SNDHLS2853Percentage of Sand Hills setting from Sando and others (2008)percentpercent
SEPAVPRE123Mean September Precipitationinchesmm
SEPAVTMP124Mean September Temperaturedegrees Fdegrees C
SHAPEBSFT1754Shape factor from Basinsoft computed as basin length divided by basin widthdimensionlessdimensionless
SINUOS90Main Channel Sinuositymiles per milekm per km
SLENRAT163Main channel length - squared - divided by the contributing drainage areadimensionlessdimensionless
SLOP301859Slopes Greater Than 30 Percentpercentpercent
SLOP30_10M1855Percent area with slopes greater than 30 percent from 10-meter NEDpercentpercent
SLOP30_30M1182Percent area with slopes greater than 30 percent from 30-meter DEM.percentpercent
SLOP501777Slopes Greater Than 50 Percent as percent of drainage areapercentpercent
SLOP50_30M2855Percent area with slopes greater than 50 percent from 30-meter DEM.percentpercent
SLOPERAT1760Slope ratio computed as main channel slope divided by basin slopedimensionlessdimensionless
SLOPERATIO1773Ratio of main channel slope to basin slope as defined in SIR 2006-5112dimensionlessdimensionless
SLPFM3D1905Change 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 gridfeet per mim per km
SN1026Maximum March 15 Water Equivalent of Snow Cover at 10-Year Recurrence Intervalinchesmm
SN10027Maximum March 15 Water Equivalent of Snow Cover at 100-Year Recurrence Intervalinchesmm
SN236Maximum March 15 Water Equivalent of Snow Cover at 2-Year Recurrence Intervalinchesmm
SN2534Maximum March 15 Water Equivalent of Snow Cover at 25-Year Recurrence Intervalinchesmm
SN5037Maximum March 15 Water Equivalent of Snow Cover at 50-Year Recurrence Intervalinchesmm
SNOAPR38Mean Water Equivalent of Snow Cover in Aprilinchesmm
SNOFALL97Mean Annual Snowfallinchesmm
SNOMAR91Mean Water Equivalent of Snow Cover in Marchinchesmm
SNOWATER132Water Equivalent of Mean Annual Snowfallinchesmm
SOILA144Percentage of area of Hydrologic Soil Type Apercentpercent
SOILCorD2080Percentage of area of Hydrologic Soil Type C or D from SSURGOpercentpercent
SOILD145Percentage of area of Hydrologic Soil Type Dpercentpercent
SOILINDEX1196Mean STATSGO Hydrologic Soils Index (from PL. 2 WRIR 03-4107 for WY)dimensionlessdimensionless
SOIL_INF164Soil infiltration index from NRCSinchesmm
SOILPERM63Average Soil Permeabilityinches per hourmm per hr
SRUN2880Mean annual surface runoffinchesmm
SRUN07112881Mean annual dry season surface runoff, July through Novemberinchesmm
SRUN12062882Mean annual wet season surface runoff, December through Juneinchesmm
SSURGOA2227Percentage of area of Hydrologic Soil Type A from SSURGOpercentpercent
SSURGOAA2223Area underlain by hydrologic soil type A from SSURGOsquare mileskm2
SSURGOAB2232Area underlain by hydrologic soil type B from SSURGOsquare mileskm2
SSURGOAC2230Area underlain by hydrologic soil type C from SSURGOsquare mileskm2
SSURGOAD2225Area underlain by hydrologic soil type D from SSURGOsquare mileskm2
SSURGOB2234Percentage of area of Hydrologic Soil Type B from SSURGOpercentpercent
SSURGOC2236Percentage of area of Hydrologic Soil Type C from SSURGOpercentpercent
SSURGOD2442Percentage of area of Hydrologic Soil Type D from SSURGOpercentpercent
SSURGODEP2390Area-weighted average soil depth from NRCS SSURGO databaseinchesmm
SSURGOKSAT2391Saturated hydraulic conductivity in micrometers per second from NRCS SSURGO databasemicrometers per secondmicrometers per second
SSURGOSCAP2388Area-weighted average soil capacity from NRCS SSURGO databaseinchesmm
SSURGPDRN2499Percentage of poorly drained soil, from SSURGOpercentpercent
SSURGSAND2498Percentage of sand in soils, from SSURGOpercentpercent
SSURGWATCP2485Available water capacity of the top 60 inches of soil - determined from SSURGO datain per inmm per mm
STAID1Station Identification Number dimensionlessdimensionless
STANAME2Station Name dimensionlessdimensionless
STATE14State code dimensionlessdimensionless
STATE_HWY2901Length of state highways in basinmileskm
STATOM19_82496Percentage of soils with greater than 7.3 percent and less than or equal to 19.8 percent organic matter from STATSGOpercentpercent
STATOM55_72497Percentage of soils with greater than 19.8 percent and less than or equal to 55.7 percent organic matter from STATSGOpercentpercent
STATSCLAY102487Percentage of soils with less than 10 percent clay from STATSGOpercentpercent
STATSCLY202488Percentage of soils with greater than 10 percent and less than or equal to 20 percent clay from STATSGOpercentpercent
STATSCLY302489Percentage of soils with greater than 20 percent and less than or equal to 30 percent clay from STATSGOpercentpercent
STATSCLY402490Percentage of soils with greater than 30 percent and less than or equal to 40 percent clay from STATSGOpercentpercent
STATSCLY502491Percentage of soils with greater than 40 percent and less than or equal to 50 percent clay from STATSGOpercentpercent
STATSCLY602492Percentage of soils with greater than 50 percent and less than or equal to 60 percent clay from STATSGOpercentpercent
STATSDQUAL2318Drainage quality index from STATSGO, see http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml#Entity_and_Attribute_Informationdimensionlessdimensionless
STATSGKSAT2392Saturated hydraulic conductivity in micrometers per second from NRCS STATSGO databasemicrometers per secondmicrometers per second
STATSGOA2228Percentage of area of Hydrologic Soil Type A from STATSGOpercentpercent
STATSGOAA2224Area underlain by hydrologic soil type A from STATSGOsquare mileskm2
STATSGOAB2233Area underlain by hydrologic soil type B from STATSGOsquare mileskm2
STATSGOAC2231Area underlain by hydrologic soil type C from STATSGOsquare mileskm2
STATSGOAD2226Area underlain by hydrologic soil type D from STATSGOsquare mileskm2
STATSGOB2235Percentage of area of Hydrologic Soil Type B from STATSGOpercentpercent
STATSGOC2237Percentage of area of Hydrologic Soil Type C from STATSGOpercentpercent
STATSGOD2894Percentage of area of Hydrologic Soil Type D from STATSGOpercentpercent
STATSGODEP2389Area-weighted average soil depth from NRCS STATSGO databaseinchesmm
STATSGORO2443Drainage runoff number from STATSGO database where 1 is well and 7 is poordimensionlessdimensionless
STATSOM0_52493Percentage of soils with less than 0.5 percent organic matter from STATSGOpercentpercent
STATSOM2_62494Percentage of soils with greater than 0.50 percent and less than or equal to 2.60 percent organic matter from STATSGOpercentpercent
STATSOM7_32495Percentage of soils with greater than 2.6 percent and less than or equal to 7.3 percent organic matter from STATSGOpercentpercent
STATSPERM2385Area-weighted average soil permeability from NRCS STATSGO databaseinches per hourmm per hr
STATSSCAP2387Area-weighted average soil capacity from NRCS STATSGO databaseinchesmm
STATSWATCP2486Available water capacity of the top 60 inches of soil - determined from STATSGO datain per inmm per mm
STATYPE3Station type code dimensionlessdimensionless
STORAGE155Percentage of area of storage (lakes ponds reservoirs wetlands)percentpercent
STORAGEp11191Percent Storage plus 1 (MN ROI Parm)dimensionlessdimensionless
STORDELU1353Percentage of wetlands and water bodies determined from 2003 Delaware land-use datasetpercentpercent
STORMD972244Percent area of storage (wetlands and water bodies) from Maryland Dept of Planning 1997 land-use datapercentpercent
STORNHD1349Percent storage (wetlands and waterbodies) determined from 1:24K NHDpercentpercent
STORNWI2649Percentage of strorage (combined water bodies and wetlands) from the Nationa Wetlands Inventorypercentpercent
STRDEN1186Stream Density -- total length of streams divided by drainage areamiles per square milekm per km2
STRDENED2513Stream Density -- total length of streams divided by drainage area, edited from NHDmiles per square milekm per km2
STREAM_VARG2843Streamflow variability index as defined in WRIR 02-4068, computed from regional griddimensionlessdimensionless
STRMTOT170Total length of mapped streams in basinmileskm
STRMTOTED2840Total length of mapped streams in basin, from edited hi-res NHDmileskm
SYNTHET23Blank if flow data were not synthesized - S if all flows were synthesized - SL if low flows were synthesized - SP if peak flows were synthesizeddimensionlessdimensionless
TAU_ANN_G2906Tau, Average annual base-flow recession time constant as defined in SIR 2008-5065, estimated from a griddaysdays
TAU_SPR_G2908Tau, Average base-flow recession time constant for March through April as defined in SIR 2008-5065, estimated from a griddaysdays
TAU_WIN_G2907Tau, Average base-flow recession time constant for November through December as defined in SIR 2008-5065, estimated from a griddaysdays
TEMP98Mean Annual Temperaturedegrees Fdegrees C
TEMP_01_032076Basinwide average temperature for January to March perioddegrees Fdegrees C
TEMP_06_101308Basinwide average temperature for June to October summer perioddegrees Fdegrees C
TILL2362Percent surface area covered by till depositspercentpercent
TILROCK156Percentage of area of thin glacial till over bedrockpercentpercent
TIMETOPK169TimeToPeakhourshours
TNCLFACT211952-Year Climate Factor for Tennesseedimensionlessdimensionless
TNPHYSFAC1223Tenessee physiographic factor, computed as described in WRIR 03-4176, p. 14dimensionlessdimensionless
TNSOILFAC1899Tennessee soil factor, percentage of area underlain by a soil permeability greater than or equal to 2 inches per hourdimensionlessdimensionless
TRUN07112875Mean annual dry season total runoff, July through Novemberinchesmm
TRUN12062876Mean annual wet season total runoff, December through Juneinchesmm
TXURBINDEX1795Urbanization index defined in WRIR 82-18dimensionlessdimensionless
UAF_OK1842Urban adjustment factor as described in OK WRIR 1997-4202dimensionlessdimensionless
URBAN157Percentage of basin with urban developmentpercentpercent
URBAN152091Basin with urban development greater than 15 percentYes or NoYes or No
VALLEN171Valley length measured along general path of floodplane from the outlet to the basin dividemileskm
VOLCANIC1776Percent of drainage area as surficial volcanic rocks as defined in SIR 2006-5035percentpercent
VRCARB2453Percent of area of carbonate rocks within the Valley and Ridge Physiographic Regionpercentpercent
VRPLSLC2452Percent of area of siliciclastic rocks witin the Valley and Ridge or Appalachian Plateau Physiographic Regionspercentpercent
WACTCH1302Width of active channelfeetm
WATCAP60Available water capacity of the top 60 inches of soil - determined from STATSGO datain per inmm per mm
WATER2643Percentage of land area covered by open water - source not specifiedpercentpercent
WATWET1287Percent open water and herbaceous wetland from NLCDpercentpercent
WBANKFULL1303Width of channel at bankfullfeetm
WE_MAR292Water equivalent of snow cover as of the first week in March - 2-year recurrence intervalinchesmm
WETLAND158Percentage of Wetlandspercentpercent
WETLNDLU062278Percentage of wetlands from NLCD 2006 classes 90 and 95percentpercent
WETLNDNWI2846Percentage of wetlands as determined from the National Wetlands Inventory (2001)percentpercent
WR7D10Y16847-day R.O. that occurs in Nov. thru Mar. once every 10 yearsinchesmm

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