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Version 2 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.
LabelStatistic NameDefinitionEnglishMetric
ABEL8KDrainage_Area_below_8000ftDrainage Area below 8000ftsquare mileskm2
ACARBONArea_of_Carbonate_RockArea underlain by carbonate rocksquare mileskm2
ACHSWAMPArea_of_Main_Channel_SwampMain Channel Swampsquare mileskm2
ACLAYArea_of_Lacustrine_Clay_and_SiltArea underlain by lacustrine clay and siltsquare mileskm2
ACRSDFTArea_of_Coarse_Stratified_DriftArea underlain by stratified driftsquare mileskm2
ACRSTILLArea_of_Coarse_TillArea underlain by coarse-textured glacial tillsquare mileskm2
ACTIVEActive_stationStation is currently activeYes or NoYes or No
ADETENArea_of_Lake_and_Detention_BasinLake and Detention Basin Areasquare mileskm2
ADEVNLCD01Developed_area_from_NLCD2001Total area of land-use classifications 21-24 from NLCD 2001square mileskm2
ADJCOEFFAdjustment_Coefficient_From_Page_11Coefficient to adjust estimates for percentage of carbonate rock in Western Marylanddimensionlessdimensionless
AFINMORArea_of_End_Moraine_Fine_TillArea underlain by end moraines of fine-textured tillsquare mileskm2
AFORESTArea_of_Forest_CoverArea covered by forestsquare mileskm2
AG_OF_DAAg_Land_PercentageAgricultural Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035percentpercent
AGENCY_CDAgency_cdUSGS NWIS Agency code for Stationdimensionlessdimensionless
AGLACIERArea_of_GlaciersArea covered by glacierssquare mileskm2
AGMD97Percent_Agricultural_MDOP97Percent area of agricultural land use from Maryland Dept of Planning 1997 land-use datapercentpercent
AIMPERVArea_of_Impervious_SurfacesImpervious areasquare mileskm2
ALAKEArea_of_Lakes_and_PondsArea of Lakes and Pondssquare mileskm2
ALIMEArea_of_LimestoneArea underlain by limestone geologysquare mileskm2
ALTINDAltitude_IndexAltitude Indexthousand feetkilometer
AMEDTILLMedium_Till_AreaArea underlain by medium-textured glacial tillsquare mileskm2
AMUCKArea_of_Peat_and_MuckArea underlain by peat and mucksquare mileskm2
AOSAverage_Maximum_Overland_SlopeAverage Maximum Overland Slopepercentpercent
AOUTWASHArea_of_OutwashArea underlain by outwashsquare mileskm2
APRAVMean_April_TemperatureMean April Temperaturedegrees Fdegrees C
APRAVPREMean_April_PrecipitationMean April Precipitationinchesmm
ARBEL8KArea_below_8000_ftDrainage Area below 8000ftsquare mileskm2
ASOILAArea_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type Asquare mileskm2
ASOILDArea_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type Dsquare mileskm2
ASTORAGEArea_of_StorageArea of Storage (lakes - ponds - and wetlands )square mileskm2
ATILROCKArea_of_Thin_Till_over_BedrockArea underlain by thin glacial till over bedrocksquare mileskm2
AUGAVMean_August_TemperatureMean August Temperaturedegrees Fdegrees C
AUGAVPREMean_August_PrecipitationMean August Precipitationinchesmm
AURBANArea_of_Urban_CoverArea covered by urban land usesquare mileskm2
AVMXSSAverage_Maximum_Soil_SlopeAverage Maximum Soil Slopepercentpercent
AWETLANDArea_of_WetlandsArea of Wetlandssquare mileskm2
AZ_HIPERMAAZ_Percent_HighPerm_AquiferPercent basin surface area containing high permeability aquifer units as defined in SIR 20xx-xxxxpercentpercent
AZ_HIPERMGAZ_Percent_HighPerm_GeologicPercent basin surface area containing high permeability geologic units as defined in SIR 20xx-xxxxpercentpercent
AZIMUTHAzimuthDecimal degrees from north of a straight line connecting the points 10- and 85-percent of distance along main stream channeldecimal degreesdecimal degrees
BASELNDPTHBaseline_DepthDepth of the 50-percent flow duration in feet above the zero-flow point.feetm
BASINDrainage_Basin_CodeLocal code of major drainage basin in which the station is locateddimensionlessdimensionless
BASINPERIMBasin_PerimeterPerimeter of the drainage basin as defined in SIR 2004-5262mileskm
BASLENAHBasin_Length_ArcHydro_MethodBasin length from outlet to basin divide determined using the method in the ArcHydro Toolsetmileskm
BASSTRMORDBasin_Stream_OrderStrahler stream order of the main channel at the basin outletdimensionlessdimensionless
BASWIDTHEffective_Basin_WidthEffective basin width computed as drainage area (DRNAREA) divided by basin length (BASLENAH)mileskm
BDFBasin_Development_FactorUrbanization index described by Sauer and others (1981) - Also called Urbanization Index in Texasdimensionlessdimensionless
BEGIN_RECBegin_date_of_recordFirst day of recorddaysdays
BFREGBankfull_Flow_RegionBankfull-flow region codedimensionlessdimensionless
BRMETAPercent_Blue_Ridge_Metamorphic_RocksPercent area of metamorphic rocks within the Blue Ridge Physiographic Regionpercentpercent
BSHAPEBasin_Shape_FactorBasin Shape Factor for Areadimensionlessdimensionless
BSLDEM10ffMean_Basin_Slope_from_10m_DEM_ft_per_ftMean basin slope computed from 10 m DEM in feet per footfeet per footm per m
BSLDEM10MMean_Basin_Slope_from_10m_DEMMean basin slope computed from 10 m DEMpercentpercent
BSLDEM250Mean_Basin_Slope_from_250K_DEMMean basin slope computed from 1:250K DEMpercentpercent
BSLDEM30ffMean_Basin_Slope_from_30m_DEM_ft_per_ftMean basin slope computed from 30 m DEM in feet per footfeet per footm per m
BSLDEM30MMean_Basin_Slope_from_30m_DEMMean basin slope computed from 30 m DEMpercentpercent
BSLOPCMMean_Basin_Slope_ft_per_miMean 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
BSLOPDMean_Basin_Slope_degreesMean basin slope measured in degreesdegreesdegrees
BSLOPGMMean_Basin_Slope_ft_per_ftMean basin slope determined using the grid-sampling methodfeet per footm per m
CANOPY_PCTPercent_Area_Under_CanopyPercentage of drainage area covered by canopy as described in OK SIR 2009_5267percentpercent
CARBADJUSTCarbonate_AdjustmentBinary variable for Western Maryland low-flow equations equals 1 if CARBON greater than 40 percent and zero otherwisedimensionlessdimensionless
CARBONPercent_CarbonatePercentage of area of carbonate rockpercentpercent
CB01BAREPercent_Barren_Ches_BayLC_2001Percent barren from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01CRPHAYPercent_Crops_and_Hay_Ches_BayLC_2001Percent cultivated crops and hay from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01DEVPercent_Developed_ Ches_Bay_LC2001Percent developed from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01FORSHBPercent_Forest_and_Shrub_Ches_BayLC_2001Percent forests and shrub lands from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01HERBPercent_Herbaceous_Ches_BayLC_2001Percent herbaceous from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01WATERPercent_Water_Ches_BayLC_2001Percent open water from 2001 Chesapeake Bay land cover datasetpercentpercent
CB01WETLNDPercent_Wetlands_Ches_BayLC_2001Percent wetlands 2001 Chesapeake Bay land cover datasetpercentpercent
CB06BAREPercent_Barren_Ches_BayLC_2001Percent barren from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06CRPHAYPercent_Crops_and_Hay_Ches_BayLC_2006Percent cultivated crops and hay from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06DEVPercent_Developed_Ches_BayLC_2006Percent developed 2006 Chesapeake Bay land cover datasetpercentpercent
CB06FORSHBPercent_Forest_and_Shrub_Ches_BayLC_2006Percent forests and shrub lands from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06HERBPercent_Herbaceous_Ches_BayLC_2006Percent herbaceous from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06WATERPercent_Water_Ches_BayLC_2006Percent water from 2006 Chesapeake Bay land cover datasetpercentpercent
CB06WETLNDPercent_Wetlands_Ches_BayLC_2006Percent wetlands from 2006 Chesapeake Bay land cover datasetpercentpercent
CCMConstant_of_Channel_MaintenanceConstant of channel maintenance computed as drainage area divided by total stream lengthsquare mile per milekm2 per km
CELVBLUEAverage_Channel_ElevationAverage of outlet elevation and the elevation at the upstream extent of the mapped streamfeetm
CELVMEANMean_Main_Channel_ElevationMean elevation along the main channelfeetm
CENTROIDXBasin_Centroid_XBasin centroid horizontal (x) location in state plane coordinatesState plane coordinatesState plane coordinates
CENTROIDYBasin_Centroid_YBasin centroid vertical (y) location in state plane unitsState plane coordinatesState plane coordinates
CENTROXRIBasin_Centroid_X_RIBasin centroid horizontal (x) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CENTROYRIBasin_Centroid_Y_RIBasin centroid vertical (y) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CFClimate_FactorClimate factor for areadimensionlessdimensionless
CH92_01DEVPercent_Diff_Developed_NLCD1992_to_2001Percent Difference between 1992 and 2001 area covered by developed land using NLCDpercentpercent
CH92_01FORPercent_Diff_Forest_NLCD1992_to_2001Percent Difference between 1992 and 2001 area covered by forest using NLCDpercentpercent
CHANCONDAverage_Channel_ConditionCondition between points 100- 75- 50- and 25-percent along main channel - 2 if entirely paved - 1 if unpaveddimensionlessdimensionless
CHSWAMPPercent_Main_Channel_SwampPercentage of area of main channel swampspercentpercent
CIRC_RATIOCircularity_RatioCircularity Ratiodimensionlessdimensionless
CLENBLUEMain_Channel_Blue_Line_LengthLength of main channel shown as blue line on a topographic mapmileskm
CLIMFAC2YR2_Yr_climate_factor_LK1990Two-year climate factor from Lichy and Karlinger (1990)dimensionlessdimensionless
COASTDISTDistance_From_Coast_To_Basin_CentroidShortest distance from Gulf of Maine line along coast to basin centroidmileskm
COMMD97Percent_Commercial_MDOP97Percent area of commercial land use from Maryland Dept of Planning 1997 land-use datapercentpercent
COMPRATCompactness_RatioA measure of basin shape related to basin perimeter and drainage areadimensionlessdimensionless
CONIFPercent_Coniferous_ForestPercentaqe of land surface covered by coniferous forestpercentpercent
CONTDAContributing_Drainage_AreaArea that contributes flow to a point on a streamsquare mileskm2
CONTROLPercent_ControlledPercent of basin controlled by lakes swamps and reservoirspercentpercent
CONTROLLEDPercentage_of_Controlled_AreaPercent of basin controlled by lakes swamps and reservoirs - see WRIR 00 4189percentpercent
CONVEYBank_Full_Channel_ConveyanceConveyance of main stream channel at bank-full conditionscubic feet per secondm3 per second
COUNTYCounty_CodeCounty code dimensionlessdimensionless
CPSEDPercent_Coastal_Plain_Sedimentary_RocksPercent area of sedimentary rockswithin the Coastal Plain Physiographic Regionpercentpercent
CRSDFTPercent_Coarse_Stratified_DriftPercentage of area of coarse-grained stratified driftpercentpercent
CRSTILLPercent_Coarse_TillPercentage of area of coarse tillpercentpercent
CSL10_85Stream_Slope_10_and_85_MethodChange in elevation between points 10 and 85 percent of length along main channel to basin divide divided by length between pointsfeet per mim per km
CSL10_85fmStream_Slope_10_and_85_Method_ft_per_miChange 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
CSL1085LFPStream_Slope_10_and_85_Longest_Flow_PathChange in elevation between points 10 and 85 percent of length along the longest flow path determined by a GIS divided by length between the pointsfeet per mim per km
CSL1085LOStream_Slope_10_and_85_Lower_HalfChange 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
CSL1085UPStream_Slope_10_and_85_Upper_HalfChange 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
CSLArc10Stream_Slope_ArcHydro_Method_10m_DEMStream slope computed using method from ArcHydro Tools and 10 meter DEMpercentpercent
CSLBlueStream_Slope_Blue_Line_MethodChange in elevation of the longest blue-line stream divided by stream lengthfeet per mim per km
CSLBlue_ffMain_Channel_Slope_ft_per_ftChange in elevation of the longest blue-line stream divided by stream lengthfeet per footm per m
DA1000Drainage_Area_Divided_By_1000Drainage area divided by 1000square mileskm2
DATUMDatum_of_Latitude_LongitudeDatum used to determine the site coordinatesdimensionlessdimensionless
DAUNREGUnregulated_Drainage_AreaUnregulated drainage area used in OK regulated equationssquare mileskm2
DECAVPREMean_December_PrecipitationMean December Precipitationinchesmm
DECAVTMPMean_December_TemperatureMean December Temperaturedegrees Fdegrees C
DESMOINDes_Moines_LobeArea underlain by Des Moines Lobepercentpercent
DETENPercent_Lake_and_Detention_BasinPercentage of area of lakes and detention basinspercentpercent
DEVNLCD01Percent_developed_from_NLCD2001Percentage of land-use categories 21-24 from NLCD 2001percentpercent
DEVPT_LU92Percent_Developed_from_NLCD92Percent Developed from NLCD92percentpercent
DINTNLCD01Development_Intensity_from_NLCD2001Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2001percentpercent
DIRECTDirectionsDirections dimensionlessdimensionless
DISTANCEDistance_from_Ungaged_StationDistance from Ungaged Stationmileskm
DISTRICTDistrict_CodeCode of the state where the station is located.dimensionlessdimensionless
DMARMAXTMPNormal_Daily_Max_March_TempNormal Daily Maximum March Temperaturedegrees Fdegrees C
DRFTPERSTRStratified_Drift_per_Stream_LengthArea of stratified drift per unit of stream lengthsquare mile per milekm2 per km
DRNDrainage_QualityDrainage quality (1=well drained to 7=poorly drained) from dataset at http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xmldimensionlessdimensionless
DRNAREADrainage_AreaArea that drains to a point on a streamsquare mileskm2
DRNDENSITYBasin_Drainage_DensityBasin drainage density defined as total stream length divided by drainage area.miles per square milekm per km2
DRNFREQDrainage_FrequencyNumber of first order streams per square mile of drainage areaper square mileper km2
DURREGFlow_Duration_Region_CodeFlow-Duration Hydrologic Region code dimensionlessdimensionless
DV_OF_DADev_Land_percentageDeveloped Land in Percentage of Drainage Area (Idaho Logistic Regression Equations SIR 2006-5035percentpercent
EFFECTDAEffective_Drainage_AreaTotal drainage area minus area upstream from erosion-control and flood-retention structuressquare mileskm2
EL1200Percentage_of_Basin_Above_1200_ftPercentage of basin at or above 1200 ft elevationpercentpercent
EL2000Percent_Area_Above_2000_ftPercent of basin area that is above 2000 feet elevationpercentpercent
EL5000Percent_above_5000_ftPercent of area above 5000 ftpercentpercent
EL6000Percent_above_6000_ftPercent of area above 6000 ftpercentpercent
EL7000Percent_Above_7000_ftPercent of area above 7000 ftfeetm
EL7500Percent_above_7500_ftPercent of area above 7500 ftpercentpercent
ELEVMean_Basin_ElevationMean Basin Elevationfeetm
ELEV1000Elevation_in_ThousandsElevation in Thousandsthousand feetkilometer
ELEV10FTElev_10pct_LFP_from_DEMElevation at 10 percent from outlet along longest flow path slope using DEMfeetm
ELEV10FT3DElev_10pct_LFP_from_3DlineElevation at 10 percent from outlet along longest flow path slope using 3D linefeetm
ELEV85FTElev_85pct_LFP_from_DEMElevation at 85 percent from outlet along longest flow path slope using DEMfeetm
ELEV85FT3DElev_85pct_LFP_from_3DlineElevation at 85 percent from outlet along longest flow path slope using 3D linefeetm
ELEVMAXMaximum_Basin_ElevationMaximum basin elevationfeetm
ELONGRATIOElongation_RatioElongation Ratiodimensionlessdimensionless
ELV10_85Elevation_of_10_and_85_pointsAverage of channel elevations at points 10- and 85- percent above gage - Equivalent to Altitude Indexfeetm
END_RECEnd_date_of_recordLast day of recorddaysdays
ET0306MODMean_Monthly_EvapTrans_Mar_to_Jun_MODISSpring (March-June) mean monthly evapotranspiration (2001-2011), MODISinchesmm
ET0710MODMean_Monthly_EvapTrans_Jul_to_Oct_MODISSummer (July-October) mean monthly evapotranspiration (2001-2011), MODISinchesmm
EVAPMean_Annual_Lake_EvaporationMean Annual Lake Evaporationinchesmm
EVAPANMean_Annual_Pan_EvaporationMean Annual Pan Evaporationinchesmm
FEBAVPREMean_February_PrecipitationMean February Precipitationinchesmm
FEBAVTMPMean_February_TemperatureMean February Temperaturedegrees Fdegrees C
FINMORPercent_Fine_End_MorainePercentage of area of end moraine fine tillpercentpercent
FIRSTYEARFirst_Year_of_RecordYear in which record was first collected or used for analysisyearsyears
FORESTPercent_ForestPercentage of area covered by forestpercentpercent
FOREST_MDPercent_forest_from_MD_2010_land_usePercent forest from Maryland 2010 land-use datapercentpercent
FORESTp1Percent_Forest_add_1_ID_ROI_ParmPercent Forest plus 1 (ID ROI Parm)dimensionlessdimensionless
FORMD97Percent_Forest_MDOP97Percent area of forest from Maryland Dept of Planning 1997 land-use datapercentpercent
FOSTREAMNumber_of_First_Order_StreamsNumber of first order streams determined using the Strahler stream ordering systemdimensionlessdimensionless
FROSTMean_February_28_Frost_DepthMean frost depth on February 28inchesmm
GA_PKREG1Georgia_Peak_Flow_Region_1Georgia Peak Flow Region 1 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG2Georgia_Peak_Flow_Region_2Georgia Peak Flow Region 2 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG3Georgia_Peak_Flow_Region_3Georgia Peak Flow Region 3 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG4Georgia_Peak_Flow_Region_4Georgia Peak Flow Region 4 from SIR 2009-5043dimensionlessdimensionless
GA_PKREG5Georgia_Peak_Flow_Region_5Georgia Peak Flow Region 5 from SIR 2009-5043dimensionlessdimensionless
GENROGeneralized_RunoffGeneralized mean annual runoff in Minnesota 1951-85dimensionlessdimensionless
GEOFACTVTGeographic_Factor_for_VTNorthing of the centroid of the drainage basin in the Vermont State Plane coordinate system divided by 100000 then increased by 1dimensionlessdimensionless
GEOFACTWYGeographic_Factor_for_WYGeographic factor for Wyoming from plate 1 of Lohman (1988)dimensionlessdimensionless
GLACIATEDPercent_of_GlaciationPercentage of basin area that was historically covered by glacierspercentpercent
GLACIERPercent_GlaciersPercentage of area of Glacierspercentpercent
GUTTERGutter_LengthLength of gutters per square mile of drainage areamiles per square milekm per km2
GWHEADGroundwater_HeadMean - minimum basin elevationfeetm
HCDN2009HCDN_2009Station 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
HIELONGRATHawaii_Elongation_RatioRatio of (1)diameter of circle with equal area as basin to (2)basin length, as defined in SIR 2004-5262dimensionlessdimensionless
HIGHEQUHigh_Flow_Regression_EquationIndicates whether the site was used to develop high-flow regression equations Yes or NoYes or No
HIGHREGHigh_Flow_Region_CodeHigh-Flow Hydrologic Region code dimensionlessdimensionless
HIMARRATEHawaii_Mean_Rainfall_RateMean annual rainfall rate determined based on the method described in SIR 2004-5262cubic feet per secondm3 per second
HIRAINRATEMaximum_Weighted_Rainfall_RateMaximum Weighted Rainfall Ratecubic feet per secondm3 per second
HOMDEN2000Housing_Density_during_2000Housing density from 2000 census datahomes per acrehomes per km2
HOMDENCYRHousing_Density_of_Centroid_YearHousing density for centroid year of streamflow data collectionhomes per acrehomes per km2
HOMEDENSHousing_DensityAverage homes per acre in watershedhomes per acrehomes per km2
HUCHydrologic_Unit_NumberHydrologic Unit Number dimensionlessdimensionless
HYPSOHypsometric_Area_RatioSingle-valued index equal to the ratio of the area under the normalized hypsometric curvedimensionlessdimensionless
I24H100Y24_Hour_100_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 100 yearsinchesmm
I24H10Y24_Hour_10_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 10 yearsinchesmm
I24H25Y24_Hour_25_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 25 yearsinchesmm
I24H2Y24_Hour_2_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 2 years - Equivalent to precitation intensity indexinchesmm
I24H500Y24_Hour_500_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 500 yearsinchesmm
I24H50Y24_Hour_50_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 50 yearsinchesmm
I24H5Y24_Hour_5_Year_PrecipitationMaximum 24-hour precipitation that occurs on average once in 5 yearsinchesmm
I24MAX24_Hour_Maximum_PrecipitationMaximum 24-hour precipitation for period of recordinchesmm
I2H2Y2_Hour_2_Year_PrecipitationMaximum 2-hour precipitation that occurs on average once in 2 yearsinchesmm
I48H100Y48_Hour_100_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 100 yearsinchesmm
I48H10Y48_Hour_10_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 10 yearsinchesmm
I48H25Y48_Hour_25_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 25 yearsinchesmm
I48H2Y48_Hour_2_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 2 yearsinchesmm
I48H500Y48_Hour_500_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 500 yearsinchesmm
I48H50Y48_Hour_50_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 50 yearsinchesmm
I48H5Y48_Hour_5_Year_PrecipitationMaximum 48-hour precipitation that occurs on average once in 5 yearsinchesmm
I60M100Y60_Min_100_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 100 yearsinchesmm
I60M10Y60_Min_10_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 10 yearsinchesmm
I60M25Y60_Min_25_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 25 yearsinchesmm
I60M2Y60_Min_2_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 2 yearsinchesmm
I60M500Y60_Min_500_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 500 yearsinchesmm
I60M50Y60_Min_50_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 50 yearsinchesmm
I60M5Y60_Min_5_Year_PrecipitationMaximum 60-min precipitation that occurs on average once in 5 yearsinchesmm
I6H100Y6_Hour_100_Year_Precipitation6-hour precipitation that is expected to occur on average once in 100 yearsinchesmm
I6H10Y6_Hour_10_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 10 yearsinchesmm
I6H25Y6_Hour_25_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 25 yearsinchesmm
I6H2Y6_Hour_2_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 2 yearsinchesmm
I6H500Y6_Hour_500_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 500 yearsinchesmm
I6H50Y6_Hour_50_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 50 yearsinchesmm
I6H5Y6_Hour_5_Year_PrecipitationMaximum 6-hour precipitation that occurs on average once in 5 yearsinchesmm
ILREG1Region_1_Indicator__enter_1Indicator variable for IL region 1, enter 1 if site is in region 1 else 0dimensionlessdimensionless
ILREG3Region_3_Indicator__enter_1Indicator variable for IL region 3, enter 1 if site is in region 3 else 0dimensionlessdimensionless
ILREG5Region_5_Indicator__enter_1Indicator variable for IL region 5, enter 1 if site is in region 5 else 0dimensionlessdimensionless
ILREG6Region_6_Indicator__enter_1Indicator variable for IL region 6, enter 1 if site is in region 6 else 0dimensionlessdimensionless
ILREG7Region_7_Indicator__enter_1Indicator variable for IL region 7, enter 1 if site is in region 7 else 0dimensionlessdimensionless
IMPERVPercent_ImperviousPercentage of impervious areapercentpercent
IMPMD97Percent_Impervious_MDOP97Percent area of impervious surfaces from Maryland Dept of Planning 1997 land-use datapercentpercent
IMPNLCD01Percent_Impervious_NLCD2001Percentage of impervious area determined from NLCD 2001 impervious datasetpercentpercent
ISOLAKEPercent_Drains_to_Isolated_Water_BodiesPercentage of land area that drains to lakes and ponds that are not connected to the stream network, from 1:24,000 scale DRG datapercentpercent
ISOLAKEDAPercent_Area_Draining_to_Isolated_LakesPercent of the drainage area that drains to isolated lakes and ponds from 1:24K DRGspercentpercent
JANAVPREMean_January_PrecipitationMean January Precipitationinchesmm
JANAVTMPMean_January_TemperatureMean January Temperaturedegrees Fdegrees C
JANMAXTMPMean_Maximum_January_TemperatureMean Maximum January Temperaturedegrees Fdegrees C
JANMINTMPMean_Min_January_TemperatureMean Minimum January Temperaturedegrees Fdegrees C
JULAVPREMean_July_PrecipitationMean July Precipitationinchesmm
JULYAVEPREMean_July_PrecipitationMean July Precipitationdimensionlessdimensionless
JULYAVTMPMean_July_TemperatureMean July Temperaturedegrees Fdegrees C
JULYMAXTMPMean_Max_July_TemperatureMean Maximum July Temperaturedegrees Fdegrees C
JULYMINTMPMean_Minimum_July_TemperatureMean Minumum July Temperaturedegrees Fdegrees C
JUNAVPREMean_June_PrecipitationMean June Precipitationinchesmm
JUNEAVPREMean_June_PrecipitationMean June Precipitationdimensionlessdimensionless
JUNEAVTMPMean_June_TemperatureMean June Temperaturedegrees Fdegrees C
LAGFACTORLag_FactorLag Factor as defined in SIR 2006-5112dimensionlessdimensionless
LAKEAREAPercent_Lakes_and_PondsPercentage of Lakes and Pondspercentpercent
LAKESp1Percent_Lakes_add_1_MN_ROI_ParmPercent Lakes plus 1 (MN ROI Parm)dimensionlessdimensionless
LASTYEARLast_Year_of_RecordYear in which record was last collected or used for analysisyearsyears
LAT_CENTLatitude_of_Basin_CentroidLatitude of Basin Centroiddecimal degreesdecimal degrees
LAT_GAGELatitudeLatitudedecimal degreesdecimal degrees
LAT_NHDLatitude_on_NHDLatitude of station location on National Hydrography Datasetdegreesdegrees
LAT_OUTLatitude_of_Basin_OutletLatitude of Basin Outletdegreesdegrees
LC01AIMPImpervious_Area_from_NLCD2001Impervious area determined from NLCD 2001 impervious datasetsquare mileskm2
LC01BAREBarren_Land_NLCD_2001Percentage of area barren land, NLCD 2001 category 31percentpercent
LC01CROPCultivated_Crops_NLCD_2001Percentage of area cultivated crops, NLCD 2001 category 82percentpercent
LC01CRPHAYPercent_Crops_and_Hay_from_NLCD2001Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2001percentpercent
LC01DEVHIHigh_developed_NLCD_2001Percentage of area developed, high intensity, NLCD 2001 category 24percentpercent
LC01DEVMDMedium_developed_NLCD_2001Percentage of area developed, medium intensity, NLCD 2001 category 23percentpercent
LC01EVERGEvergreen_Forest_NLCD_2001Percentage of area evergreen forest, NLCD 2001 category 42percentpercent
LC01FORESTPercent_Forest_from_NLCD2001Percentage of forest from NLCD 2001 classes 41-43percentpercent
LC01FORSHBPercent_Forest_and_Shrub_from_NLCD2001Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2001percentpercent
LC01HERBPercent_Herbaceous_Upland_from_NLCD2001Percentage of herbaceous upland from NLCD 2001 class 71percentpercent
LC01IMPPercent_Impervious_NLCD2001Percentage of impervious land cover from NLCD 2001percentpercent
LC01OPNLOOpen_and_Low_NLCD_2001Percentage of area developed, open space and low intensity combined, NLCD2001 cat. 21 and 22percentpercent
LC01WATERPercent_Water_from_NLCD2001Percentage of open water, class 11, from NLCD 2001percentpercent
LC01WETLNDPercent_Wetlands_from_NLCD2001Percentage of wetlands, classes 90 and 95, from NLCD 2001percentpercent
LC06ABAREArea_Barren_from_NLCD2006Area of barren from NLCD 2006 class 31square mileskm2
LC06ACROPArea_Cultivated_Crops_from_NLCD2006Area of area of cultivated crops from NLCD 2006 class 82square mileskm2
LC06ADECIDArea_Deciduous_from_NLCD2006Area of deciduous forest from NLCD 2006 class 41square mileskm2
LC06ADEVArea_developed_from_NLCD2006Area of developed land-use from NLCD 2006 classes 21-24square mileskm2
LC06ADEVHIArea_High_developed_NLCD_2006Area of developed land, high intensity, NLCD 2006 class 24square mileskm2
LC06ADEVLOArea_Low_Developed_from_NLCD2006Area of developed land, low intensity, from NLCD 2006 class 22square mileskm2
LC06ADEVMDArea_Medium_developed_NLCD_2006Area of developed land, medium intensity, NLCD 2006 class 23square mileskm2
LC06ADVOPNArea_Open_Developed_from_NLCD2006Area of developed open land from NLCD 2006 class 21square mileskm2
LC06ADWARFArea_Dwarf_Scrub_from_NLCD2006Area of dwarf scrub from NLCD 2006 class 51square mileskm2
LC06AEMWETArea_Emergent_Wetlands_from_NLCD2006Area of area of emergent herbaceous wetlands from NLCD 2006 class 95square mileskm2
LC06AEVERGEvergreen_Forest_NLCD_2006Area of evergreen forest from NLCD 2006 class 42square mileskm2
LC06AFORESArea_Forest_from_NLCD2006Area of forest from NLCD 2006 classes 41-43square mileskm2
LC06AGRASSArea_Grassland_from_NLCD2006Area of grassland from NLCD 2006 class 71square mileskm2
LC06AGRIPercent_Agriculture_from_NLCD_2006Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82percentpercent
LC06AHERBArea_Herbaceous_from_NLCD2006Area of herbaceous from NLCD 2006 classes 71-74square mileskm2
LC06AIMPArea_Impervious_NLCD2006Area of impervious land surface determined from NLCD 2006 impervious datasetsquare mileskm2
LC06ALICHNArea_Lichens_from_NLCD2006Area of lichens from NLCD 2006 class 73square mileskm2
LC06ALTFORAlternate_Forest_PercentagePercentage of forested land area from NLCD2006 classes 22, 41-43 and 90percentpercent
LC06AMOSSArea_Moss_from_NLCD2006Area of moss from NLCD 2006 class 74square mileskm2
LC06AMXFORArea_Mixed_Forest_from_NLCD2006Area of mixed deciduous and evergreen forest from NLCD 2006 class 43square mileskm2
LC06AOPNLOArea_Open_and_Low_NLCD_2006Area of developed land, open space and low intensity combined, NLCD2006 classes 21 and 22square mileskm2
LC06APASTArea_Pasture_from_NLCD2006Area of area of pasture area from NLCD 2006 class 81square mileskm2
LC06APLANTArea_Planted_from_NLCD2006Area of planted area from NLCD 2006 classes 81 and 82square mileskm2
LC06ASCRUBArea_Scrub_from_NLCD2006Area of scrub from NLCD 2006 classes 51 and 52square mileskm2
LC06ASEDGEArea_Sedge_from_NLCD2006Area of sedge from NLCD 2006 class 72square mileskm2
LC06ASHRUBArea_Shrub_from_NLCD2006Area of shrub scrub from NLCD 2006 class 52square mileskm2
LC06ASNOICArea_Snow_&_Ice_NLCD2006Area of snow and ice from NLCD 2006 class 12square mileskm2
LC06ASTORArea_Storage_from_NLCD2006Area of water bodies and wetlands determined from the NLCD 2006 classes 11, 90 and 95square mileskm2
LC06AWATERArea_Water_from_NLCD2006Area of water from NLCD 2006 class 11square mileskm2
LC06AWATWTArea_Water_&_Herb_Wetland_NLCD2006Area open water and herbaceous wetland from NLCD 2006 classes 11 and 95square mileskm2
LC06AWDWETArea_Woody_Wetlands_from_NLCD2006Area of area of wooded wetlands from NLCD 2006 class 90square mileskm2
LC06AWETLArea_Wetlands_from_NLCD2006Area of wetlands from NLCD 2006 classes 90 and 95square mileskm2
LC06BAREPercent_Barren_from_NLCD2006Percentage of barren from NLCD 2006 class 31percentpercent
LC06BARSCBPercent_Barren_and_Scrub_from_NLCD_2006Percentage of barren and scrub land from NLCD classes 31, 51, and 52percentpercent
LC06CROPPercent_Cultivated_Crops_from_NLCD2006Percentage of area of cultivated crops from NLCD 2006 class 82percentpercent
LC06CRPHAYPercent_Crops_and_Hay_from_NLCD2006Percentage of cultivated crops and hay, classes 81 and 82, from NLCD 2006percentpercent
LC06DECIDPercent_Deciduous_from_NLCD2006Percentage of deciduous forest from NLCD 2006 class 41percentpercent
LC06DEVPercent_Developed_from_NLCD2006Percentage of land-use from NLCD 2006 classes 21-24percentpercent
LC06DEVHIPercent_High_Developed_from_NLCD2006Percentage of area developed, high intensity, NLCD 2006 class 24percentpercent
LC06DINTDevelopment_Intensity_from_NLCD2006Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2006percentpercent
LC06DVLOPercent_Low_Developed_from_NLCD2006Percentage of developed area, low intensity, from NLCD 2006 class 22percentpercent
LC06DVMDPercent_Medium_developed_NLCD_2006Percentage of area developed, medium intensity, NLCD 2006 class 23percentpercent
LC06DVMDHIPercent_Medium_High_developed_NLCD_2006Percentage of area developed, medium and high intensity, NLCD 2006 classes 23 and 24percentpercent
LC06DVOPNPercent_Open_Developed_from_NLCD2006Percentage of developed open area from NLCD 2006 class 21percentpercent
LC06DWARFPercent_Dwarf_Scrub_from_NLCD2006Percentage of dwarf scrub from NLCD 2006 class 51percentpercent
LC06EMWETPercent_Emergent_Wetlands_from_NLCD2006Percentage of area of emergent herbaceous wetlands from NLCD 2006 class 95percentpercent
LC06EVERGPercent_Evergreen_Forest_NLCD_2006Percentage of evergreen forest from NLCD 2006 class 42percentpercent
LC06FORESTPercent_Forest_from_NLCD2006Percentage of forest from NLCD 2006 classes 41-43percentpercent
LC06FORSHBPercent_Forest_and_Shrub_from_NLCD2006Percentage of forests and shrub lands, classes 41 to 52, from NLCD 2006percentpercent
LC06GRASSPercent_Grassland_from_NLCD2006Percentage of grassland from NLCD 2006 class 71percentpercent
LC06HERBPercent_Herbaceous_from_NLCD2006Percentage of herbaceous from NLCD 2006 classes 71-74percentpercent
LC06IMPPercent_Impervious_NLCD2006Percentage of impervious area determined from NLCD 2006 impervious datasetpercentpercent
LC06LICHENPercent_Lichens_from_NLCD2006Percentage of lichens from NLCD 2006 class 73percentpercent
LC06MIXFORPercent_Mixed_Forest_from_NLCD2006Percentage of mixed deciduous and evergreen forest from NLCD 2006 class 43percentpercent
LC06MOSSPercent_Moss_from_NLCD2006Percentage of moss from NLCD 2006 class 74percentpercent
LC06OPNLOPercent_Open_and_Low_Developed_NLCD_2006Percentage of area developed, open space and low intensity combined, NLCD2006 classes 21 and 22percentpercent
LC06PASTPercent_Pasture_from_NLCD2006Percentage of area of pasture area from NLCD 2006 class 81percentpercent
LC06PLANTPercent_Planted_from_NLCD2006Percentage of planted area from NLCD 2006 classes 81 and 82percentpercent
LC06SCRUBPercent_Scrub_from_NLCD2006Percentage of scrub from NLCD 2006 classes 51 and 52percentpercent
LC06SEDGEPercent_Sedge_from_NLCD2006Percentage of sedge from NLCD 2006 class 72percentpercent
LC06SHRUBPercent_Shrub_from_NLCD2006Percentage of shrub scrub from NLCD 2006 class 52percentpercent
LC06SNOICPercent_Snow_&_Ice_NLCD2006Percent snow and ice from NLCD 2006 class 12percentpercent
LC06STORPercent_Storage_from_NLCD2006Percentage of water bodies and wetlands determined from the NLCD 2006percentpercent
LC06WATERPercent_Water_from_NLCD2006Percent water from NLCD 2006 class 11percentpercent
LC06WATERPercent_Water_from_NLCD2006Percentage of open water, class 11, from NLCD 2006percentpercent
LC06WATWETPercent_Water_&_Herb_Wetland_NLCD2006Percent open water and herbaceous wetland from NLCD 2006 classes 11 and 95percentpercent
LC06WDWETPercent_Woody_Wetlands_from_NLCD2006Percentage of area of wooded wetlands from NLCD 2006 class 90percentpercent
LC06WETLNDPercent_Wetlands_from_NLCD2006Percentage of wetlands, classes 90 and 95, from NLCD 2006percentpercent
LC92FORESTPercent_Forest_from_NLCD1992Percentage of forest from NLCD 1992 classes 41-43percentpercent
LC92STORPercent_Storage_from_NLCD1992Percentage of water bodies and wetlands determined from the NLCDpercentpercent
LENGTHMain_Channel_LengthLength along the main channel from the measuring location extended to the basin dividemileskm
LFPLENGTHLFP_lengthLength of longest flow pathmileskm
LIMEPercent_LimestonePercentage of area of limestone geologypercentpercent
LNG_GAGELongitudeLongitudedecimal degreesdecimal degrees
LOESSDEPLoess_DepthDepth of loess depositsfeetm
LOGDALog_of_Drainage_AreaLogarithm base 10 of drainage areaLog base 10Log base 10
LOGDA1000Log_Of_Drainage_Area_Divided_By_1000Log of drainage area divided by 1000Log base 10Log base 10
LOGPREC28Log_Of_Mean_Annual_Precip_Divided_By_28Log of mean annual precipitation from PRISM divided by 28inchesmm
LON_NHDLongitude_on_NHDLongitude of station location on National Hydrography Datasetdegreesdegrees
LONG_CENTLongitude_of_Basin_CentroidLongitude Basin Centroiddecimal degreesdecimal degrees
LONG_OUTLongitude_of_Basin_OutletLongitude of Basin Outletdegreesdegrees
LONGESTFPLongest_Flow_PathLongest distance along stream from site of interest to top of basinmileskm
LOWEQULow_Flow_Regression_EquationIndicates whether the site was used to develop low-flow regression equations Yes or NoYes or No
LOWREGLow_Flow_Region_CodeLow-Flow Hydrologic Region code dimensionlessdimensionless
LSTPERMLeast_Permeable_Layer_PermeabilityPermeability of least permeable layerinches per hourmm per hr
LU12Sum_of_Land_Use_I_and_IIIndex based on the sum of land use types I and II in Portland-Vancouver WAsquare mileskm2
LU92BAREPercent_Barren_from_NLCD1992Percent Barren from NLCD1992percentpercent
LU92FORUPPercent_Forested_Upland_from_NLCD1992Percent Forested Upland from NLCD1992percentpercent
LU92HRBCPercent_Cult_Herb_Upland_from_NLCD1992Percent Cultivated Herbaceous Upland from NLCD1992percentpercent
LU92HRBNPercent_Nat_Herb_Upland_from_NLCD1992Percent Natural Herbaceous Upland from NLCD1992percentpercent
LU92WATERPercent_Water_from_NLCD1992Percent Water from NLCD1992percentpercent
LU92WETLNPercent_Wetland_from_NLCD1992Percent Wetland from NLCD1992percentpercent
MAPMMean_Annual_Precip_Basin_AverageMean Annual Precip Basin Averageinchesmm
MARMean_Annual_Runoff_in_inchesMean annual runoff for the period of record in inchesinchesmm
MAR14D10Y14_Day_10_Year_Average_Annual_Runoff14-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR14D20Y14_Day_20_Year_Average_Annual_Runoff14-day eman annual runoff that occurs on average once in 20 yearsinchesmm
MAR14D2Y14_Day_2_Year_Average_Annual_Runoff14-day mean annual runoff that occurs on average once in 2 yearsinchesmm
MAR14D50Y14_Day_50_Year_Average_Annual_Runoff14-day mean annual runoff that occurs on average once in 50 yearsinchesmm
MAR14D5Y14_Day_5_Year_Average_Annual_Runoff14-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MAR1D10Y1_Day_10_Year_Mean_Annual_Runoff1-day mean annual funoff that occurs on average once in 10 yearsinchesmm
MAR1D20Y1_Day_20_Year_Mean_Annual_Runoff1-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR1D2Y1_Day_2_Year_Mean_Annual_Runoff1-day mean annual runoff that occurs on average once in 2 years.inchesmm
MAR1D50Y1_Day_50_Year_Mean_Annual_Runoff1-day mean annual runoff that occurs on aberage once in 50 years.inchesmm
MAR1D5Y1_Day_5_Year_Mean_Annual_Runoff1-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MAR30D10Y30_Day_10_Year_Average_Annual_Runoff30-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR30D2Y30_Day_2_Year_Average_Annual_Runoff30-day mean annual runoff that occurs on average once in 2 yearsinchesmm
MAR30D5Y30_Day_5_Year_Average_Annual_Runoff30-day man annual runoff that occurs on average once in 5 yearsinchesmm
MAR3D10Y3_Day_10_Year_Mean_Annual_Runoff3-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR3D20Y3_Day_20_Year_Mean_Annual_Runoff3-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR3D2Y3_Day_2_Year_Mean_Annual_Runoff3-daymean annual runoff that occurs on average once in 2 yearsinchesmm
MAR3D50Y3_Day_50_Year_Mean_Annual_Runoff3-day mean annual runoff that occurs on average once in 50 years.inchesmm
MAR3D5Y3_Day_5_Year_Mean_Annual_Runoff3_Day_5_Year_Mean_Annual_Runoffinchesmm
MAR4D3Y4_Day_3_Year_Mean_Annual_Runoff4_Day_3_Year_Mean_Annual_Runoffinchesmm
MAR7D10Y7_Day_10_Year_Average_Annual_Runoff7-day mean annual runoff that occurs on average once in 10 yearsinchesmm
MAR7D20Y7_Day_20_Year_Average_Annual_Runoff7-day mean annual runoff that occurs on average once in 20 yearsinchesmm
MAR7D2Y7_Day_2_Year_Average_Annual_Runoff7-day mean annual runoff that occurs on avrage once in 2 yearsinchesmm
MAR7D50Y7_Day_50_Year_Average_Annual_Runoff7-day mean annual runoff that occurs on average once in 50 yearsinchesmm
MAR7D5Y7_Day_5_Year_Average_Annual_Runoff7-day mean annual runoff that occurs on average once in 5 yearsinchesmm
MARAVPREMean_March_PrecipitationMean March Precipitationinchesmm
MARAVTMPMean_March_TemperatureMean March Temperaturedegrees Fdegrees C
MARCFSMMean_Annual_Runoff_in_cfsmMean annual runoff for the period of record in cubic feet persecondcubic feet per second per square milecubic meters per second per square kilometer
MAREGIONMassachusetts_RegionRegion of Massachusetts 0 for Eastern 1 for Westerndimensionlessdimensionless
MARMAXTMPMean_Max_March_TemperatureMean Maximum March Temperaturedegrees Fdegrees C
MAXBSLOPDMaximum_Basin_Slope_in_degMaximum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data.degreesdegrees
MAXTEMPMean_Annual_Max_TemperatureMean annual maximum air temperature over basin area from PRISM 1971-2000 800-m griddegrees Fdegrees C
MAYAVPREMean_May_PrecipitationMean May Precipitationinchesmm
MAYAVTMPMean_May_TemperatureMean May Temperaturedegrees Fdegrees C
MCDMCD_CodeMCD Codedimensionlessdimensionless
MCSPMain_Channel_Slope_ProportionMain channel slope proportion computed by Basinsoft as main channel length divided by the square root of the main channel slopedimensionlessdimensionless
MCSRBSFTMain_Channel_Sinuosity_RatioMain-channel sinuosity ratio computed by Basinsoft as main channel length divided by basin lengthdimensionlessdimensionless
MDAREADrainage_Area_in_MarylandDrainage area of the basin within the State of Marylandsquare mileskm2
MEDPRECMedian_Annual_PrecipitationMedian Annual Precipitationinchesmm
MEDTILLPercent_Medium_TillPercentage of area of medium-textured glacial tillpercentpercent
MESZOICPercent_Within_the_Mesozoic_Basins Percent of area within the Mesozoic Basins percentpercent
MINBELEVMinimum_Basin_ElevationMinimum basin elevationfeetm
MINBSLOPDMinimum_Basin_Slope_in_degMinimum basin slope, in degrees, using ArcInfo Grid with NHDPlus 30-m resolution elevation data.degreesdegrees
MINTEMPMean_Annual_Min_TemperatureMean annual minimum air temperature over basin surface area as defined in SIR 2008-5126degrees Fdegrees C
MIXFORPercent_Mixed_ForestPercentage of land area covered by mixed deciduous and coniferous forestpercentpercent
MONREGMonthly_and_Annual_Region_CodeMonthly and Annual Hydrologic Region code dimensionlessdimensionless
MORTILLEnd_Moraines_of_Fine_Textured_TillPercentage of End Moraines of Fine-Textured Tillpercentpercent
MR30D2Y30_Day_2_Year_Mean_Annual_Runoff30-day mean annual runoff that occurs on average once every two yearsinchesmm
MR7D10Y7_Day_10_Year_Mean_Annual_Runoff7-day mean annual runoff that occurs on average once every 2 yearsinchesmm
MR7D2Y7_Day_2_Year_Mean_Annual_Runoff7-day mean annual runoff that occurs on average once every 2 yearsinchesmm
MSTPERMMost_Permeable_Layer_PermeabilityPermeability of the most permeable layerinches per hourmm per hr
MUCKPercent_Peat_and_MuckPercentage of area of peat and muckpercentpercent
MXSNOMedian_Seasonal_Maximum_Snow_Depth50th percentile of seasonal maximum snow depth from Northeast Regional Climate Center atlas by Cember and Wilks, 1993inchesmm
NCMRNorth_Carolina_Mean_Annual_RunoffNorth Carolina mean annual runoffcubic feet per second per square milecubic meters per second per square kilometer
NDAY_RECNumber_of_days_of_recordNumber of days of recorddaysdays
NDAYSGT0Number_of_days_GT_0Number of days with flow greater than zerodaysdays
NFSL30North_Facing_Slopes_Grt_Than_30_PercentNorth-Facing Slopes Greater Than 30 Percentpercentpercent
NFSL30_10MN_Facing_Slopes_gt_30pct_from_10m_NEDPercent area with north-facing slopes greater than 30 percent from 10-meter NED.percentpercent
NFSL30_30MN_Facing_Slopes_gt_30pct_from_30m_DEMPercent area with north-facing slopes greater than 30 percent from 30-meter DEM.percentpercent
NOVAVPREMean_November_PrecipitationMean November Precipitationinchesmm
NOVAVTMPMean_November_TemperatureMean November Temperaturedegrees Fdegrees C
NYMARNew_York_Mean_Annual_RunoffNew York mean annual runoff from Randall (1996)inchesmm
OCTAVPREMean_October_PrecipitationMean October Precipitationinchesmm
OCTAVTMPMean_October_TemperatureMean October Temperaturedegrees Fdegrees C
OH_INF_INDOhio_Infiltration_IndexIndex of relative infiltration from Koltun(1986)dimensionlessdimensionless
OHCLFAC100Ohio_Climate_Factor_100_YearOhio Climate Factor 100 Yeardimensionlessdimensionless
OHCLFAC2Ohio_Climate_Factor_2_YearOhio Climate Factor 2 Yeardimensionlessdimensionless
OHCLFAC25Ohio_Climate_Factor_25_YearOhio Climate Factor 25 Yeardimensionlessdimensionless
OHPHYSSECTOhio_Physiographic_SectionsOhio Physiographic Sectionsdimensionlessdimensionless
OHREG_CODEOhio_Flood_Region_Letter_CodeOhio Flood Region Letter Codedimensionlessdimensionless
OHREGAOhio_Region_A_Indicator_1_if_in_A_else_0Ohio Region A Indicatordimensionlessdimensionless
OHREGCOhio_Region_C_Indicator_1_if_in_C_else_0Ohio Region C Indicatordimensionlessdimensionless
OmegaEMOmegaEM_residual_from_2009_5087Generalized regression residual as defined in TX SIR 2009-5087dimensionlessdimensionless
OR_HIPERMAOR_Percent_HighPerm_AquiferPercent basin surface area containing high permeability aquifer units as defined in SIR 2008-5126percentpercent
OR_HIPERMGOR_Percent_HighPerm_GeologicPercent basin surface area containing high permeability geologic units as defined in SIR 2008-5126percentpercent
ORDOMISSPercent_SurficialGeology_Ordo_and_MissPercent Surficial Geology as Ordovician and Mississippian Rockspercentpercent
OTHEQUOther_Regression_EquationIndicates whether the site was used to develop regression equations for other than high or low flowsYes or NoYes or No
OUTLETELEVElevation_of_GageElevation of the stream outlet in thousands of feet above NAVD88.feetm
OUTLETXBasin_Outlet_XBasin outlet horizontal (x) location in state plane coordinatesState plane coordinatesState plane coordinates
OUTLETXRIBasin_Outlet_X_RIBasin outlet horizontal (x) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
OUTLETYBasin_Outlet_YBasin outlet vertical (y) location in state plane coordinatesState plane coordinatesState plane coordinates
OUTLETYRIBasin_Outlet_Y_RIBasin outlet vertical (y) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
OUTWASHPercent_OutwashPercentage of area of outwashpercentpercent
PCLAYPercent_Lacustrine_Clay_and_SiltPercentage of lacustrine clay and siltpercentpercent
PCTREG1Percent_Area_in_Region_1Percentage of drainage area located in Region 1percentpercent
PCTREG2Percent_Area_in_Region_2Percentage of drainage area located in Region 2percentpercent
PCTREG3Percent_Area_in_Region_3Percentage of drainage area located in Region 3percentpercent
PCTREG4Percent_Area_in_Region_4Percentage of drainage area located in Region 4percentpercent
PCTREG5Percent_Area_in_Region_5Percentage of drainage area located in Region 5percentpercent
PCTSNDGRVPercent_Underlain_By_Sand_And_GravelPercentage of land surface underlain by sand and gravel depositspercentpercent
PDIGMETPercent_Piedmont_Igneous_and_MetamorphicPercent area of igneous and metamorphic within the Piedmont Physiographic Regionpercentpercent
PERM12INSoil_permeability_top_12_inArea-weighted average soil permeability for top 12 inches of soilinches per hourmm per hr
PERM24INSoil_permeability_top_24_inArea-weighted average soil permeability for top 24 inches of soilinches per hourmm per hr
PERMGTE2INPercent_permeability_gte_2_in_per_hrPercent of area underlain by soils with permeability greater than or equal to 2 inches per hourpercentpercent
PERMSSURAverage_Soil_Permeability_from_SSURGOArea-weighted average soil permeability from NRCS SSURGO databaseinches per hourmm per hr
PERRECPeriod_of_recordPeriod of record yearsyears
PKDPTH10Ten_Year_Flood_DepthDepth of the 10-year flood discharge in feet above the baseline_depth.feetm
PKDPTH100One_Hundred_Year_Flood_DepthDepth of the 100-year flood discharge in feet above the baseline_depth.feetm
PKDPTH2Two_Year_Flood_DepthDepth of the 2-year flood discharge in feet above the baseline_depth.feetm
PKDPTH25Twenty_Five_Year_Flood_DepthDepth of the 25-year flood discharge in feet above the baseline_depth.feetm
PKDPTH50Fifty_Year_Flood_DepthDepth of the 50-year flood discharge in feet above the baseline_depth.feetm
PKDPTH500Five_Hundred_Year_Flood_DepthDepth of the 500-year flood discharge in feet above the baseline_depth.feetm
PLCHSWAMPPercent_Length_of_Main_Channel_SwampsPercentage of the main channel length that flows through swampspercentpercent
POPDENSBasin_Population_DensityBasin Population Densitypersons per square milepersons per km2
PRC1Mean_January_PrecipitationMean January Precipitationdimensionlessdimensionless
PRC4Mean_April_PrecipitationMean April Precipitationdimensionlessdimensionless
PRC8Mean_August_PrecipitationMean August Precipitationdimensionlessdimensionless
PRCWINTERMean_Annual_Winter_PrecipitationMean annual precipitation for December through Februaryinchesmm
PREBC_1112Nov_to_Dec_Basin_Centroid_PrecipMean annual precipitation of basin centroid for November 1 to December 31 periodinchesmm
PREBC0103Jan_to_Mar_Basin_Centroid_PrecipMean annual precipitation of basin centroid for January 1 to March 15 winter periodinchesmm
PREC10to4Mean_Oct_to_Apr_PrecipitationMean precipitation for winter period defined as October to Aprilinchesmm
PRECIPMean_Annual_PrecipitationMean Annual Precipitationinchesmm
PRECIP28Mean_Annual_Precipitation_Divided_By_28Mean annual precipitation from PRISM divided by 28inchesmm
PRECIPCENTMean_Annual_Precip_at_Basin_CentroidMean Annual Precip at Basin Centroidinchesmm
PRECIPOUTMean_Annual_Precip_at_GageMean annual precip at the stream outlet (based on annual PRISM precip data in inches from 1971-2000)inchesmm
PRECless35Mean_Annual_Precip_less_35_LA_ROI_ParmMean Annual Precip - 35 (LA ROI Parm)inchesmm
PREG_03_05Mar_to_May_Gage_PrecipitationMean precipitation at gaging station location for March 16 to May 31 spring periodinchesmm
PREG_06_10Jun_to_Oct_Gage_PrecipitationMean precipitation at gaging station location for June to October summer periodinchesmm
PREG_11_05Nov_to_May_Gage_PrecipitationMean monthly precipitation for Novermber through May at the stream outletinchesmm
PREMARAPRBasin_Ave_Rainfall_Mar_AprPrecipitation March-April basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRENOVAPRBasin_Ave_Rainfall_Nov_AprPrecipitation November-April basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRENOVDECBasin_Ave_Rainfall_Nov_DecPrecipitation November-December basin average, mean monthly as defined in SIR 2008-5065inchesmm
PRNOVAPR00Basin_Ave_Rainfall_Nov_Apr_PRISM_2000Precipitation November-April basin average, mean seasonal from PRISM 1971-2000percentpercent
PRNOVAPR90Basin_Ave_Rainfall_Nov_Apr_PRISM_1990Precipitation November-April basin average, mean seasonal from PRISM 1961-1990percentpercent
PSFSLp1Pct_South_Facing_Slopes_add_1_ID_ROIPct. South Facing Slopes plus 1 (ID ROI Parm)dimensionlessdimensionless
PWIN_MEDec_to_Feb_Mean_PrecipitationMean annual precipitation for winter defined for Maine as December to Februaryinchesmm
RCHRG_ANNGW_Recharge_AnnAnnual ground water recharge rateinchesmm
RCHRG_FALGW_Recharge_Nov_to_DecGround water recharge rate during fall season November 1 to December 31inchesmm
RCHRG_SPRGW_Recharge_Mar16_to_MayGround water recharge rate during spring season March 16 to May 31inchesmm
RCHRG_SUMGW_Recharge_Jun_to_OctGround water recharge rate during summer season June 1 to October 31inchesmm
RCHRG_WINGW_Recharge_Jan_to_Mar15Ground water recharge rate during winter season January 1 to March 15inchesmm
RCNRunoff_Curve_NumberRunoff-curve number as defined by NRCS (http://policy.nrcs.usda.gov/OpenNonWebContent.aspx?content=17758.wba)dimensionlessdimensionless
RCNMD97Runoff_Curve_Number_MOP97Runoff curve number determined from STATSGO soils and MD Dept of Planning 1997 land usedimensionlessdimensionless
REGULATERegulatedIndicates whether flow at the site is affected by regulations or diversionsYes or NoYes or No
RELIEFReliefMaximum - minimum elevationfeetm
RELRELFRelative_ReliefBasin relief divided by basin perimeterfeet per mim per km
REMARKSRemarksRemarksdimensionlessdimensionless
RESMD97Percent_Residential_MDOP97Percent area of residential land use from Maryland Dept of Planning 1997 land-use datapercentpercent
ROCKDEPDepth_to_RockDepth to rockfeetm
ROIREGNROI_Region_IDID for the radius of Influence regiondimensionlessdimensionless
ROTUNDRotundityRotundity computed as 0.785 times shape factor (SHAPE)dimensionlessdimensionless
ROTUNDBSFTRotundity_of_Basin_from_BasinsoftRotundity of basin from Basinsoft computed as 0.785 times shape factordimensionlessdimensionless
RSDRelative_Stream_DensityRelative stream density first defined in SIR 2012_5171dimensionlessdimensionless
RUGGEDRuggedness_NumberRuggedness number computed as stream density times basin relieffeet per mim per km
RUNCOEFRunoff_CoefficientSoil runoff coefficient defined in Davis (1975)dimensionlessdimensionless
SANDGRAVFraction_Underlain_By_Sand_And_GravelFraction of land surface underlain by sand and gravel depositsdimensionlessdimensionless
SEPAVPREMean_September_PrecipitationMean September Precipitationinchesmm
SEPAVTMPMean_September_TemperatureMean September Temperaturedegrees Fdegrees C
SHAPEBSFTShape_Factor_from_BasinsoftShape factor from Basinsoft computed as basin length divided by basin widthdimensionlessdimensionless
SINUOSMain_Channel_SinuosityMain Channel Sinuositymiles per milekm per km
SLENRATSlenderness_RatioMain channel length - squared - divided by the contributing drainage areadimensionlessdimensionless
SLOP30Slopes_Greater_Than_30_PercentSlopes Greater Than 30 Percentpercentpercent
SLOP30_10MSlopes_gt_30pct_from_10m_NEDPercent area with slopes greater than 30 percent from 30-meter NED.percentpercent
SLOP30_30MSlopes_gt_30pct_from_30m_DEMPercent area with slopes greater than 30 percent from 30-meter DEM.percentpercent
SLOP50Slopes_Greater_Than_50_PercentSlopes Greater Than 50 Percent as percent of drainage areapercentpercent
SLOPERATSlope_RatioSlope ratio computed as main channel slope divided by basin slopedimensionlessdimensionless
SLOPERATIOSlope_Ratio_NYRatio of main channel slope to basin slope as defined in SIR 2006-5112dimensionlessdimensionless
SLPFM3DLFP_slope_3DlineLongest flow path slope using 3D linefeet per mim per km
SN1010_Yr_Max_Mar_15_Snow_Water_EquivMaximum March 15 Water Equivalent of Snow Cover at 10-Year Recurrence Intervalinchesmm
SN100100_Yr_Max_Mar_15_Snow_Water_EquivMaximum March 15 Water Equivalent of Snow Cover at 100-Year Recurrence Intervalinchesmm
SN22_Yr_Max_Mar_15_Snow_Water_EquivMaximum March 15 Water Equivalent of Snow Cover at 2-Year Recurrence Intervalinchesmm
SN2525_Yr_Max_Mar_15_Snow_Water_EquivMaximum March 15 Water Equivalent of Snow Cover at 25-Year Recurrence Intervalinchesmm
SN5050_Yr_Max_Mar_15_Snow_Water_EquivMaximum March 15 Water Equivalent of Snow Cover at 50-Year Recurrence Intervalinchesmm
SNOAPRApril_Mean_Snow_Water_EquivMean Water Equivalent of Snow Cover in Aprilinchesmm
SNOFALLMean_Annual_SnowfallMean Annual Snowfallinchesmm
SNOMARMarch_Snow_Water_EquivalentMean Water Equivalent of Snow Cover in Marchinchesmm
SNOWATERMean_Snow_Water_EquivalentWater Equivalent of Mean Annual Snowfallinchesmm
SOIL_INFSoil_InfiltrationSoil infiltration index from NRCSinchesmm
SOILAPercent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type Apercentpercent
SOILCorDPercent_SSURGO_Soil_Type_C_or_DPercentage of area of Hydrologic Soil Type C or D from SSURGOpercentpercent
SOILDPercent_Hydrologic_Soil_Type_DPercentage of area of Hydrologic Soil Type Dpercentpercent
SOILINDEXMean_Basin_Hydrologic_Soils_IndexMean STATSGO Hydrologic Soils Index (from PL. 2 WRIR 03-4107 for WY)dimensionlessdimensionless
SOILPERMAverage_Soil_PermeabilityAverage Soil Permeabilityinches per hourmm per hr
SSURGOASSURGO_Percent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type A from SSURGOpercentpercent
SSURGOAASSURGO_Area_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type A from SSURGOsquare mileskm2
SSURGOABSSURGO_Area_of_Hydrologic_Soil_Type_BArea underlain by hydrologic soil type B from SSURGOsquare mileskm2
SSURGOACSSURGO_Area_of_Hydrologic_Soil_Type_CArea underlain by hydrologic soil type C from SSURGOsquare mileskm2
SSURGOADSSURGO_Area_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type D from SSURGOsquare mileskm2
SSURGOBSSURGO_Percent_Hydrologic_Soil_Type_BPercentage of area of Hydrologic Soil Type B from SSURGOpercentpercent
SSURGOCSSURGO_Percent_Hydrologic_Soil_Type_CPercentage of area of Hydrologic Soil Type C from SSURGOpercentpercent
SSURGODSSURGO_Percent_Hydrologic_Soil_Type_DPercentage of area of Hydrologic Soil Type D from SSURGOpercentpercent
SSURGODEPAverage_Soil_Depth_from_SSURGOArea-weighted average soil depth from NRCS SSURGO databaseinchesmm
SSURGOKSATSSURGO_Saturated_Hydraulic_ConductivitySaturated hydraulic conductivity in micrometers per second from NRCS SSURGO databasemicrometers per secondmicrometers per second
SSURGOPERMAverage_Soil_Permeability_from_STATSGOArea-weighted average soil permeability from NRCS STATSGO databaseinches per hourmm per hr
SSURGOSCAPAverage_Soil_Capacity_from_SSURGOArea-weighted average soil capacity from NRCS SSURGO databaseinchesmm
SSURGPDRNPercent_Poorly_Drained_Soil_from_SSURGOPercentage of poorly drained soil, from SSURGOpercentpercent
SSURGSANDPercent_Sand_from_SSURGOPercentage of sand in soils, from SSURGOpercentpercent
SSURGWATCPAvailable_Water_Capacity_from_SSURGOAvailable water capacity of the top 60 inches of soil - determined from SSURGO datain per inmm per mm
STAIDStation_IDStation Identification Number dimensionlessdimensionless
STANAMEStation_NameStation Name dimensionlessdimensionless
STATEState_CodeState code dimensionlessdimensionless
STATOM19.8Percent_gt_7.3_pct_lt_19.8_pct_OrganicPercentage of soils with greater than 7.3 percent and less than or equal to 19.8 percent organic matter from STATSGOpercentpercent
STATOM55.7Percent_gt_19.8_pct_lt_55.7_pct_OrganicPercentage of soils with greater than 19.8 percent and less than or equal to 55.7 percent organic matter from STATSGOpercentpercent
STATSCLAY10Percent_of_10_Percent_or_Less ClayPercentage of soils with less than 10 percent clay from STATSGOpercentpercent
STATSCLY20Percent_of_gt_10_and_le_20_Percent_ClayPercentage of soils with greater than 10 percent and less than or equal to 20 percent clay from STATSGOpercentpercent
STATSCLY30Percent_of_gt_20_and_le_30_Percent_ClayPercentage of soils with greater than 20 percent and less than or equal to 30 percent clay from STATSGOpercentpercent
STATSCLY40Percent_of_gt_30_and_le_40_Percent_ClayPercentage of soils with greater than 30 percent and less than or equal to 40 percent clay from STATSGOpercentpercent
STATSCLY50Percent_of_gt_40_and_le_50_Percent_ClayPercentage of soils with greater than 40 percent and less than or equal to 50 percent clay from STATSGOpercentpercent
STATSCLY60Percent_of_gt_50_and_le_60_Percent_ClayPercentage of soils with greater than 50 percent and less than or equal to 60 percent clay from STATSGOpercentpercent
STATSDQUALDrainage_Quality_Index_from_STATSGODrainage quality index from STATSGO, see http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml#Entity_and_Attribute_Informationdimensionlessdimensionless
STATSGKSATSTATSGO_Saturated_Hydraulic_ConductivitySaturated hydraulic conductivity in micrometers per second from NRCS STATSGO databasemicrometers per secondmicrometers per second
STATSGOASTATSGO_Percent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type A from STATSGOpercentpercent
STATSGOAASTATSGO_Area_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type A from STATSGOsquare mileskm2
STATSGOABSTATSGO_Area_of_Hydrologic_Soil_Type_BArea underlain by hydrologic soil type B from STATSGOsquare mileskm2
STATSGOACSTATSGO_Area_of_Hydrologic_Soil_Type_CArea underlain by hydrologic soil type C from STATSGOsquare mileskm2
STATSGOADSTATSGO_Area_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type D from STATSGOsquare mileskm2
STATSGOBSTATSGO_Percent_Hydrologic_Soil_Type_BPercentage of area of Hydrologic Soil Type B from STATSGOpercentpercent
STATSGOCSTATSGO_Percent_Hydrologic_Soil_Type_CPercentage of area of Hydrologic Soil Type C from STATSGOpercentpercent
STATSGODEPAverage_Soil_Depth_from_STATSGOArea-weighted average soil depth from NRCS STATSGO databaseinchesmm
STATSGORODrainage_Runoff_Number_STATSGODrainage runoff number from STATSGO database where 1 is well and 7 is poordimensionlessdimensionless
STATSOM0.5Percent_of_lt_0.5_Percent_Organic_MatterPercentage of soils with less than 0.5 percent organic matter from STATSGOpercentpercent
STATSOM2.6Percent_gt_0.50_pct_lt_2.60_pct_OrganicPercentage of soils with greater than 0.50 percent and less than or equal to 2.60 percent organic matter from STATSGOpercentpercent
STATSOM7.3Percent_gt_2.6_pct_le_7.3_pct_OrganicPercentage of soils with greater than 2.6 percent and less than or equal to 7.3 percent organic matter from STATSGOpercentpercent
STATSSCAPAverage_Soil_Capacity_from_STATSGOArea-weighted average soil capacity from NRCS STATSGO databaseinchesmm
STATSWATCPAvailable_Water_Capacity_from_STATSGOAvailable water capacity of the top 60 inches of soil - determined from STATSGO datain per inmm per mm
STATYPEStation_typeStation type code dimensionlessdimensionless
STORAGEPercent_StoragePercentage of area of storage (lakes ponds reservoirs wetlands)percentpercent
STORAGEp1Percent_Storage_add_1_MN_ROI_ParmPercent Storage plus 1 (MN ROI Parm)dimensionlessdimensionless
STORDELUPercent_Storage_from_DE_DatasetPercentage of wetlands and water bodies determined from 2003 Delaware land-use datasetpercentpercent
STORMD97Percent_Storage_MDOP97Percent area of storage (wetlands and water bodies) from Maryland Dept of Planning 1997 land-use datapercentpercent
STORNHDPercent_Storage_from_NHDPercent storage (wetlands and waterbodies) determined from 1:24K NHDpercentpercent
STRDENStream_DensityStream Density -- total length of streams divided by drainage areamiles per square milekm per km2
STRDENEDStream_Density_EditedStream Density -- total length of streams divided by drainage area, edited from NHDmiles per square milekm per km2
STRMTOTTotal_Stream_LengthTotal length of mapped streams in basinmileskm
SYNTHETCode_to_indicate_synthesized_dataBlank if flow data were not synthesized - S if all flows were synthesized - SL if low flows were synthesized - SP if peak flows were synthesizeddimensionlessdimensionless
TEMPMean_Annual_TemperatureMean Annual Temperaturedegrees Fdegrees C
TEMP_01_03Jan_to_Mar_Mean_Basinwide_TempBasinwide average temperature for January to March perioddegrees Fdegrees C
TEMP_06_10Jun_to_Oct_Mean_Basinwide_TempBasinwide average temperature for June to October summer perioddegrees Fdegrees C
TILLPercent_area_of_tillPercent surface area covered by till depositspercentpercent
TILROCKPercent_Thin_Till_over_BedrockPercentage of area of thin glacial till over bedrockpercentpercent
TIMETOPKTimeToPeakTimeToPeakhourshours
TNCLFACT2Tennessee_Climate_Factor_2_Year2-Year Climate Factor for Tennesseedimensionlessdimensionless
TNPHYSFACTennessee_Physiographic_FactorTenessee physiographic factor, computed as described in WRIR 03-4176, p. 14dimensionlessdimensionless
TNSOILFACTennessee_Soil_FactorTennessee soil factor, percentage of area underlain by a soil permeability greater than or equal to 2 inches per hourdimensionlessdimensionless
TXURBINDEXTexas_Urbanization_IndexUrbanization index defined in WRIR 82-18dimensionlessdimensionless
UAF_OKUrban_Adjustment_FactorUrban adjustment factor as described in OK WRIR 1997-4202dimensionlessdimensionless
URBANPercent_UrbanPercentage of basin with urban developmentpercentpercent
URBAN15Percent_Urban_Greater_Than_15_PercentBasin with urban development greater than 15 percentYes or NoYes or No
VALLENValley_LengthValley length measured along general path of floodplane from the outlet to the basin dividemileskm
VOLCANICPercent_VolcanicPercent of drainage area as surficial volcanic rocks as defined in SIR 2006-5035percentpercent
VRCARBPercent_Valley_and_Ridge_Carbonate_RocksPercent of area of carbonate rocks within the Valley and Ridge Physiographic Regionpercentpercent
VRPLSLCPercent_VR_or_AP_Siliciclastic_RocksPercent of area of siliciclastic rocks witin the Valley and Ridge or Appalachian Plateau Physiographic Regionspercentpercent
WACTCHWidth_Of_Active_ChannelWidth of active channelfeetm
WATCAPAvailable_Water_CapacityAvailable water capacity of the top 60 inches of soil - determined from STATSGO datain per inmm per mm
WATWETPercent_Open_Water_&_Herb_WetlandPercent open water and herbaceous wetland from NLCDpercentpercent
WBANKFULLWidth_Of_Bankfull_ChannelWidth of channel at bankfullfeetm
WE_MAR2March_water_equivalent_2_year_RIWater equivalent of snow cover as of the first week in March - 2-year recurrence intervalinchesmm
WETLANDPercent_WetlandsPercentage of Wetlandspercentpercent
WETLNDLU06Percent_Wetlands_from_NLCD2006Percentage of wetlands from NLCD 2006 classes 90 and 95percentpercent
WR7D10Y7_Day_10_Year_Runoff_November_thru_March7-day R.O. that occurs in Nov. thru Mar. once every 10 yearsinchesmm

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