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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
ABARRENLCD06Area_Barren_from_NLCD2006Area of barren from NLCD 2006 class 31square mileskm2
ABEL8KDrainage_Area_below_8000ftDrainage Area below 8000ftsquare mileskm2
ACARBONArea_of_Carbonate_RockArea underlain by carbonate rock square mileskm2
ACHSWAMPArea_of_Main_Channel_SwampMain Channel Swamp square mileskm2
ACLAYArea_of_Lacustrine_Clay_and_SiltArea underlain by lacustrine clay and silt square mileskm2
ACROPSNLCD06Area_Cultivated_Crops_from_NLCD2006Area of area of cultivated crops from NLCD 2006 class 82square mileskm2
ACRSDFTArea_of_Coarse_Stratified_DriftArea underlain by stratified drift square mileskm2
ACRSTILLArea_of_Coarse_TillArea underlain by coarse-textured glacial till square mileskm2
ACTIVEActive_stationStation is currently activeYes or NoYes or No
ADECIDNLCD06Area_Deciduous_from_NLCD2006Area of deciduous forest from NLCD 2006 class 41square mileskm2
ADETENArea_of_Lake_and_Detention_BasinLake and Detention Basin Area square mileskm2
ADEVHINLCD06Area_High_developed_NLCD_2006Area of developed land, high intensity, NLCD 2006 class 24square mileskm2
ADEVLOWNLCD06Area_Low_Developed_from_NLCD2006Area of developed land, low intensity, from NLCD 2006 class 22square mileskm2
ADEVMEDNLCD06Area_Medium_developed_NLCD_2006Area of developed land, medium intensity, NLCD 2006 class 23square mileskm2
ADEVNLCD01Developed_area_from_NLCD2001Total area of land-use classifications 21-24 from NLCD 2001square mileskm2
ADEVNLCD06Area_developed_from_NLCD2006Area of developed land-use from NLCD 2006 classes 21-24square mileskm2
ADEVOPENNLCD06Area_Open_Developed_from_NLCD2006Area of developed open land from NLCD 2006 class 21square mileskm2
ADJCOEFFAdjustment_Coefficient_From_Page_11Coefficient to adjust estimates for percentage of carbonate rock in Western Marylanddimensionlessdimensionless
ADWARFNLCD06Area_Dwarf_Scrub_from_NLCD2006Area of dwarf scrub from NLCD 2006 class 51square mileskm2
AEMERGWETNLCD06Area_Emergent_Wetlands_from_NLCD2006Area of area of emergent herbaceous wetlands from NLCD 2006 class 95square mileskm2
AEVERGRNLCD06Evergreen_Forest_NLCD_2006Area of evergreen forest from NLCD 2006 class 42square mileskm2
AFINMORArea_of_End_Moraine_Fine_TillArea underlain by end moraines of fine-textured till square mileskm2
AFORESTArea_of_Forest_CoverArea covered by forest square mileskm2
AFORESTNLCD06Area_Forest_from_NLCD2006Area of forest from NLCD 2006 classes 41-43square 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
AGRASSNLCD06Area_Grassland_from_NLCD2006Area of grassland from NLCD 2006 class 71square mileskm2
AGRINLCD06Percent_Agriculture_from_NLCD_2006Percent agriculture computed as total of grass, pasture, and crops, NLCD classes 71, 81 and 82percentpercent
AHERBNLCD06Area_Herbaceous_from_NLCD2006Area of herbaceous from NLCD 2006 classes 71-74square mileskm2
AIMPERVArea_of_Impervious_SurfacesImpervious area square mileskm2
AIMPNLCD01Impervious_Area_from_NLCD2001Impervious area determined from NLCD 2001 impervious datasetsquare mileskm2
AIMPNLCD06Area_Impervious_NLCD2006Area of impervious land surface determined from NLCD 2006 impervious datasetsquare mileskm2
AIMPNLCD10Impervious_Area_from_NLCD2001Impervious area determined from NLCD 2001 impervious datasetsquare mileskm2
AIMPNLCD10Impervious_Area_from_NLCD2001Impervious area determined from NLCD 2001 impervious datasetsquare mileskm2
ALAKEArea_of_Lakes_and_PondsArea of Lakes and Ponds square mileskm2
ALICHENNLCD06Area_Lichens_from_NLCD2006Area of lichens from NLCD 2006 class 73square mileskm2
ALIMEArea_of_LimestoneArea underlain by limestone geology square mileskm2
ALTFORNLCD06Alternate_Forest_PercentagePercentage of forested land area from NLCD2006 classes 22, 41-43 and 90percentpercent
ALTINDAltitude_IndexAltitude Indexthousand feetkilometer
AMEDTILLMedium_Till_AreaArea underlain by medium-textured glacial till square mileskm2
AMIXFORNLCD06Area_Mixed_Forest_from_NLCD2006Area of mixed deciduous and evergreen forest from NLCD 2006 class 43square mileskm2
AMOSSNLCD06Area_Moss_from_NLCD2006Area of moss from NLCD 2006 class 74square mileskm2
AMUCKArea_of_Peat_and_MuckArea underlain by peat and muck square mileskm2
AOPENLOWNLCD06Area_Open_and_Low_NLCD_2006Area of developed land, open space and low intensity combined, NLCD2006 classes 21 and 22square mileskm2
AOSAverage_Maximum_Overland_SlopeAverage Maximum Overland Slopepercentpercent
AOUTWASHArea_of_OutwashArea underlain by outwash square mileskm2
APASTURENLCD06Area_Pasture_from_NLCD2006Area of area of pasture area from NLCD 2006 class 81square mileskm2
APLANTNLCD06Area_Planted_from_NLCD2006Area of planted area from NLCD 2006 classes 81 and 82square mileskm2
APRAVMean_April_TemperatureMean April Temperaturedegrees Fdegrees C
APRAVPREMean_April_PrecipitationMean April Precipitationinchesmm
ARBEL8KArea_below_8000_ftDrainage Area below 8000ftsquare mileskm2
ASCRUBNLCD06Area_Scrub_from_NLCD2006Area of scrub from NLCD 2006 classes 51 and 52square mileskm2
ASEDGENLCD06Area_Sedge_from_NLCD2006Area of sedge from NLCD 2006 class 72square mileskm2
ASHRUBNLCD06Area_Shrub_from_NLCD2006Area of shrub scrub from NLCD 2006 class 52square mileskm2
ASNOWICENLCD06Area_Snow_&_Ice_NLCD2006Area of snow and ice from NLCD 2006 class 12square mileskm2
ASOILAArea_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type A square mileskm2
ASOILASSURGOSSURGO_Area_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type A from SSURGOsquare mileskm2
ASOILASTATSGOSTATSGO_Area_of_Hydrologic_Soil_Type_AArea underlain by hydrologic soil type A from STATSGOsquare mileskm2
ASOILBSSURGOSSURGO_Area_of_Hydrologic_Soil_Type_BArea underlain by hydrologic soil type B from SSURGOsquare mileskm2
ASOILBSTATSGOSTATSGO_Area_of_Hydrologic_Soil_Type_BArea underlain by hydrologic soil type B from STATSGOsquare mileskm2
ASOILCSSURGOSSURGO_Area_of_Hydrologic_Soil_Type_CArea underlain by hydrologic soil type C from SSURGOsquare mileskm2
ASOILCSTATSGOSTATSGO_Area_of_Hydrologic_Soil_Type_CArea underlain by hydrologic soil type C from STATSGOsquare mileskm2
ASOILDArea_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type D square mileskm2
ASOILDSSURGOSSURGO_Area_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type D from SSURGOsquare mileskm2
ASOILDSTATSGOSTATSGO_Area_of_Hydrologic_Soil_Type_DArea underlain by hydrologic soil type D from STATSGOsquare mileskm2
ASTORAGEArea_of_StorageArea of Storage (lakes - ponds - and wetlands )square mileskm2
ASTORNLCD06Area_Storage_from_NLCD2006Area of water bodies and wetlands determined from the NLCD 2006 classes 11, 90 and 95square mileskm2
ATILROCKArea_of_Thin_Till_over_BedrockArea underlain by thin glacial till over bedrock square 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
AWATERNLCD06Area_Water_from_NLCD2006Area of water from NLCD 2006 class 11square mileskm2
AWATWETNLCD06Area_Water_&_Herb_Wetland_NLCD2006Area open water and herbaceous wetland from NLCD 2006 classes 11 and 95square mileskm2
AWETLANDArea_of_WetlandsArea of Wetlands square mileskm2
AWETLNDLU06Area_Wetlands_from_NLCD2006Area of wetlands from NLCD 2006 classes 90 and 95square mileskm2
AWOODWETNLCD06Area_Woody_Wetlands_from_NLCD2006Area of area of wooded wetlands from NLCD 2006 class 90square 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
BARRENLCD06Percent_Barren_from_NLCD2006Percentage of barren from NLCD 2006 class 31percentpercent
BARRENLU92Percent_Barren_from_NLCD1992Percent Barren from NLCD1992percentpercent
BARRENNLCD01Barren_Land_NLCD_2001Percentage of area barren land, NLCD 2001 category 31percentpercent
BARSCBNLCD06Percent_Barren_and_Scrub_from_NLCD_2006Percentage of barren and scrub land from NLCD classes 31, 51, and 52percentpercent
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
BFIBase_Flow_IndexProportion of mean annual flow that is from ground water (base flow) from Wahl and Wahl, 1988dimensionlessdimensionless
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 method feet 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
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 stream feetm
CELVMEANMean_Main_Channel_ElevationMean elevation along the main channelfeetm
CENTROIDXBasin_Centroid_XBasin centroid horizontal (x) location in state plane coordinatesState plane coordinatesState plane coordinates
CENTROIDXRIBasin_Centroid_X_RIBasin centroid horizontal (x) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CENTROIDYBasin_Centroid_YBasin centroid vertical (y) location in state plane unitsState plane coordinatesState plane coordinates
CENTROIDYRIBasin_Centroid_Y_RIBasin centroid vertical (y) location in Rhode Island state plane coordinatesState plane coordinatesState plane coordinates
CFClimate_FactorClimate factor for areadimensionlessdimensionless
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
CLIMFACT2YR2_Yr_climate_factor_LK19902-year climate factor from Lichy and Karlinger (1990)dimensionlessdimensionless
CLSL1085LFPStream_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
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
CROPSNLCD01Cultivated_Crops_NLCD_2001Percentage of area cultivated crops, NLCD 2001 category 82percentpercent
CROPSNLCD06Percent_Cultivated_Crops_from_NLCD2006Percentage of area of cultivated crops from NLCD 2006 class 82percentpercent
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
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
CUSL1085LFPStream_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
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
DECIDNLCD06Percent_Deciduous_from_NLCD2006Percentage of deciduous forest from NLCD 2006 class 41percentpercent
DESMOINDes_Moines_LobeArea underlain by Des Moines Lobe percentpercent
DETENPercent_Lake_and_Detention_BasinPercentage of area of lakes and detention basinspercentpercent
DEV_CH_92_01Percent_Diff_Developed_NLCD1992_to_2001Percent Difference between 1992 and 2001 area covered by developed land using NLCDpercentpercent
DEVHINLCD01High_developed_NLCD_2001Percentage of area developed, high intensity, NLCD 2001 category 24percentpercent
DEVHINLCD06Percent_High_Developed_from_NLCD2006Percentage of area developed, high intensity, NLCD 2006 class 24percentpercent
DEVLOWNLCD06Percent_Low_Developed_from_NLCD2006Percentage of developed area, low intensity, from NLCD 2006 class 22percentpercent
DEVMDHINLCD06Percent_Medium_High_developed_NLCD_2006Percentage of area developed, medium and high intensity, NLCD 2006 classes 23 and 24percentpercent
DEVMEDNLCD01Medium_developed_NLCD_2001Percentage of area developed, medium intensity, NLCD 2001 category 23percentpercent
DEVMEDNLCD06Percent_Medium_developed_NLCD_2006Percentage of area developed, medium intensity, NLCD 2006 class 23percentpercent
DEVNLCD01Percent_developed_from_NLCD2001Percentage of land-use categories 21-24 from NLCD 2001percentpercent
DEVNLCD06Percent_developed_from_NLCD2006Percentage of land-use from NLCD 2006 classes 21-24percentpercent
DEVNLCD92Percent_Developed_from_NLCD1992Percentage of developed land-use categories 21-23 from NLCD 1992percentpercent
DEVOPENNLCD06Percent_Open_Developed_from_NLCD2006Percentage of developed open area from NLCD 2006 class 21percentpercent
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
DINTNLCD06Development_Intensity_from_NLCD2006Impervious percentage computed as ((.10*A21+.25*A22+.65*A23+.90*A24)/DA)*100 from NLCD 2006percentpercent
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
DRAINQUALDrainage_Quality_Index_from_STATSGODrainage quality index from STATSGO, see http://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml#Entity_and_Attribute_Informationdimensionlessdimensionless
DRFTPERSTRStratified_Drift_per_Stream_LengthArea of stratified drift per unit of stream length square 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
DWARFNLCD06Percent_Dwarf_Scrub_from_NLCD2006Percentage of dwarf scrub from NLCD 2006 class 51percentpercent
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 Elevation feetm
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 elevation feetm
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
EMERGWETNLCD06Percent_Emergent_Wetlands_from_NLCD2006Percentage of area of emergent herbaceous wetlands from NLCD 2006 class 95percentpercent
END_RECEnd_date_of_recordLast day of recorddaysdays
EVAPMean_Annual_Lake_EvaporationMean Annual Lake Evaporationinchesmm
EVAPANMean_Annual_Pan_EvaporationMean Annual Pan Evaporationinchesmm
EVERGRNLCD01Evergreen_Forest_NLCD_2001Percentage of area evergreen forest, NLCD 2001 category 42percentpercent
EVERGRNLCD06Percent_Evergreen_Forest_NLCD_2006Percentage of evergreen forest from NLCD 2006 class 42percentpercent
FDRATIOFlow_Duration_Ratio20-percent flow duration divided by 90-percent flow durationdimensionlessdimensionless
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
FOR_CH_92_01Percent_Diff_Forest_NLCD1992_to_2001Percent Difference between 1992 and 2001 area covered by forest using NLCDpercentpercent
FORESTPercent_ForestPercentage of area covered by forestpercentpercent
FOREST_MDPercent_forest_from_MD_2010_land_usePercent forest from Maryland 2010 land-use datapercentpercent
FORESTNLCD01Percent_Forest_from_NLCD2001Percentage of forest from NLCD 2001 classes 41-43percentpercent
FORESTNLCD06Percent_Forest_from_NLCD2006Percentage of forest from NLCD 2006 classes 41-43percentpercent
FORESTNLCD92Percent_Forest_from_NLCD1992Percentage of forest from NLCD 1992 classes 41-43percentpercent
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
FORUPLLU92Percent_Forested_Upland_from_NLCD1992Percent Forested Upland from NLCD1992percentpercent
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
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
GRASSNLCD06Percent_Grassland_from_NLCD2006Percentage of grassland from NLCD 2006 class 71percentpercent
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
HERBNLCD01Percent_Herbaceous_Upland_from_NLCD2001Percentage of herbaceous upland from NLCD 2001 class 71percentpercent
HERBNLCD06Percent_Herbaceous_from_NLCD2006Percentage of herbaceous from NLCD 2006 classes 71-74percentpercent
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
HRBCLTLU92Percent_Cult_Herb_Upland_from_NLCD1992Percent Cultivated Herbaceous Upland from NLCD1992percentpercent
HRBNATLU92Percent_Nat_Herb_Upland_from_NLCD1992Percent Natural Herbaceous Upland from NLCD1992percentpercent
HUCHydrologic_Unit_NumberHydrologic Unit Number dimensionlessdimensionless
HYPSOHypsometric_Area_RatioSingle-valued index equal to the ratio of the area under the normalized hypsometric curvedimensionlessdimensionless
HYSEPHydrograph_separation_percentMedian percentage of baseflow to annual streamflowpercentpercent
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
IMPNLCD06Percent_Impervious_NLCD2006Percentage of impervious area determined from NLCD 2006 impervious datasetpercentpercent
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
KY_C_FACTORKY_Optimal_Cutpoint_CoefficientCoefficient to adjust to optimal cutpoint probability in PZero equations for KY in SIR 2010-5217dimensionlessdimensionless
KYVAR_INDEXKY_Variability_IndexVariability Index as defined by KY WRIR 1991-4097dimensionlessdimensionless
LAGFACTORLag_FactorLag Factor as defined in SIR 2006-5112dimensionlessdimensionless
LAGTIMELagtimeElapsed time from center of mass of rainfall excess to center of mass of flood hydrographhourshours
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
LENGTHMain_Channel_LengthLength along the main channel from the measuring location extended to the basin dividemileskm
LFPLENGTHLFP_lengthLength of longest flow pathmileskm
LICHENNLCD06Percent_Lichens_from_NLCD2006Percentage of lichens from NLCD 2006 class 73percentpercent
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 layer inches 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
M30D1000Y30_Day_1000_Year_Low_Flow30-Day mean low-flow that occurs on average once in 1000 years (0.1% chance)cubic feet per secondm3 per second
MAPMMean_Annual_Precip_Basin_AverageMean Annual Precip Basin Averageinchesmm
MARAVPREMean_March_PrecipitationMean March Precipitationinchesmm
MARAVTMPMean_March_TemperatureMean March Temperaturedegrees Fdegrees C
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
MINBELEVMinimum_Basin_ElevationMinimum basin elevation feetm
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
MIXFORNLCD06Percent_Mixed_Forest_from_NLCD2006Percentage of mixed deciduous and evergreen forest from NLCD 2006 class 43percentpercent
MONREGMonthly_and_Annual_Region_CodeMonthly and Annual Hydrologic Region code dimensionlessdimensionless
MORTILLEnd_Moraines_of_Fine_Textured_TillPercentage of End Moraines of Fine-Textured Tillpercentpercent
MOSSNLCD06Percent_Moss_from_NLCD2006Percentage of moss from NLCD 2006 class 74percentpercent
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
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
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
OPENLOWNLCD01Open_and_Low_NLCD_2001Percentage of area developed, open space and low intensity combined, NLCD2001 cat. 21 and 22percentpercent
OPENLOWNLCD06Percent_Open_and_Low_Developed_NLCD_2006Percentage of area developed, open space and low intensity combined, NLCD2006 classes 21 and 22percentpercent
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
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
PASTURENLCD06Percent_Pasture_from_NLCD2006Percentage of area of pasture area from NLCD 2006 class 81percentpercent
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
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
PERMGTE2IPHPercent_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
PERMSTATSAverage_Soil_Permeability_from_STATSGOArea-weighted average soil permeability from NRCS STATSGO databaseinches per hourmm per hr
PERRECPeriod_of_recordPeriod of record yearsyears
PLANTNLCD06Percent_Planted_from_NLCD2006Percentage of planted area from NLCD 2006 classes 81 and 82percentpercent
PLCHSWAMPPercent_Length_of_Main_Channel_SwampsPercentage of the main channel length that flows through swampspercentpercent
POPDENSBasin_Population_DensityBasin Population Density persons 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
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
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
RECESSRecession_IndexNumber of days required for streamflow to recede one order of magnitude when hydrograph is plotted on logarithmic scaledays per log cycledays per log cycle
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 rock feetm
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
SCAPSSURAverage_Soil_Capacity_from_SSURGOArea-weighted average soil capacity from NRCS SSURGO databaseinchesmm
SCAPSTATSAverage_Soil_Capacity_from_STATSGOArea-weighted average soil capacity from NRCS STATSGO databaseinchesmm
SCRUBNLCD06Percent_Scrub_from_NLCD2006Percentage of scrub from NLCD 2006 classes 51 and 52percentpercent
SDEPTHSSURAverage_Soil_Depth_from_SSURGOArea-weighted average soil depth from NRCS SSURGO databaseinchesmm
SDEPTHSTATSAverage_Soil_Depth_from_STATSGOArea-weighted average soil depth from NRCS STATSGO databaseinchesmm
SEDGENLCD06Percent_Sedge_from_NLCD2006Percentage of sedge from NLCD 2006 class 72percentpercent
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
SHRUBNLCD06Percent_Shrub_from_NLCD2006Percentage of shrub scrub from NLCD 2006 class 52percentpercent
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
SNOWICENLCD06Percent_Snow_&_Ice_NLCD2006Percent snow and ice from NLCD 2006 class 12percentpercent
SOIL_INFSoil_InfiltrationSoil infiltration index from NRCSinchesmm
SOILAPercent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type Apercentpercent
SOILASSTATSGOSTATSGO_Percent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type A from STATSGOpercentpercent
SOILASSURGOSSURGO_Percent_Hydrologic_Soil_Type_APercentage of area of Hydrologic Soil Type A from SSURGOpercentpercent
SOILBSSTATSGOSTATSGO_Percent_Hydrologic_Soil_Type_BPercentage of area of Hydrologic Soil Type B from STATSGOpercentpercent
SOILBSSURGOSSURGO_Percent_Hydrologic_Soil_Type_BPercentage of area of Hydrologic Soil Type B from SSURGOpercentpercent
SOILCorDPercent_SSURGO_Soil_Type_C_or_DPercentage of area of Hydrologic Soil Type C or D from SSURGOpercentpercent
SOILCSSTATSGOSTATSGO_Percent_Hydrologic_Soil_Type_CPercentage of area of Hydrologic Soil Type C from STATSGOpercentpercent
SOILCSSURGOSSURGO_Percent_Hydrologic_Soil_Type_CPercentage of area of Hydrologic Soil Type C from SSURGOpercentpercent
SOILDPercent_Hydrologic_Soil_Type_DPercentage of area of Hydrologic Soil Type Dpercentpercent
SOILDSSURGOSSURGO_Percent_Hydrologic_Soil_Type_DPercentage of area of Hydrologic Soil Type D from SSURGOpercentpercent
SOILINDEXMean_Basin_Hydrologic_Soils_IndexMean STATSGO Hydrologic Soils Index (from PL. 2 WRIR 03-4107 for WY)dimensionlessdimensionless
SOILPERMAverage_Soil_PermeabilityAverage Soil Permeability inches per hourmm per hr
STAIDStation_IDStation Identification Number dimensionlessdimensionless
STANAMEStation_NameStation Name dimensionlessdimensionless
STATEState_CodeState code dimensionlessdimensionless
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
STORNLCDPercent_Storage_from_NLCDPercentage of water bodies and wetlands determined from the NLCDpercentpercent
STORNLCD06Percent_Storage_from_NLCD2006Percentage of water bodies and wetlands determined from the NLCD 2006percentpercent
STRDENStream_DensityStream Densitymiles per square milekm per km2
STREAM_VARStreamflow_Variability_IndexStreamflow variability index as defined in WRIR 02-4068dimensionlessdimensionless
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
TIMETOPKTimeToPeakTimeToPeak hourshours
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
WACTCHWidth_Of_Active_ChannelWidth of active channelfeetm
WAT_LU92Percent_Water_from_NLCD1992Percent Water from NLCD1992percentpercent
WATCAPAvailable_Water_CapacityAvailable water capacity of the top 60 inches of soil - determined from STATSGO datain per inmm per mm
WATERNLCD06Percent_Water_from_NLCD2006Percent water from NLCD 2006 class 11percentpercent
WATWETPercent_Open_Water_&_Herb_WetlandPercent open water and herbaceous wetland from NLCDpercentpercent
WATWETNLCD06Percent_Water_&_Herb_Wetland_NLCD2006Percent open water and herbaceous wetland from NLCD 2006 classes 11 and 95percentpercent
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
WETLNDLU92Percent_Wetland_from_NLCD1992Percent Wetland from NLCD1992percentpercent
WOODWETNLCD06Percent_Woody_Wetlands_from_NLCD2006Percentage of area of wooded wetlands from NLCD 2006 class 90percentpercent

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