User Guide Automated Probabilistic Co-Occurrence Assessment Tool Version 2.1 - 2024

Table of Contents Terrestrial Predictor Variables Flowing Aquatic Predictor Variables Static Aquatic Predictor Variables References

Foreword  In response to the need for efficient production of advanced geospatial analyses of co-occurrence between pesticide use and species of interest as required by the Endangered Species Act, Stone Environmental, with the support of Syngenta Crop Protection, developed the Automated Probabilistic Co-Occurrence Assessment Tool (APCOAT) in early 2022. APCOAT is designed to produce probabilistic spatial models of both pesticide use and species distributions, and combine the models for co-occurrence assessments. Each of the models may also be run independently. The pesticide use models are represented by probabilistic crop footprints[1, 2] and statistical measures of the Percent Crop Treated (PCT) derived from freely available pesticide usage data[3], or from pesticide usage data provided by the user. The species distribution models (SDMs) are produced using maximum entropy methods[4] analyzing the statistical fit between species presence location records and geographic predictor rasters for environmental variables. Probabilistic co-occurrence between pesticide usage and species distributions is calculated by multiplying the two model output rasters. For planning and conservation purposes, the co-occurrence statistics may be summarized by state, crop reporting district, county, or watershed.

Predictor Variable Name	Description	Citation
annualSolar_PRISM	Average annual solar radiation, 1990 - 2020	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1], 2022[1]
BIO01_MeanTemp	Annual Mean Temperature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO02_MeanDiurnalRange	Mean of monthly (Monthly maximum temperature - Monthly minimum tempreature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO03_Isothermality	(BIO2/BIO7) x 100	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO04_Temp_StDev	(Standard deviation of monthly temperature) x 100/td>	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO05_MaxTemp	Maximum temperature of warmest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO06_MinTemp	Minimum temperature of coldest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO07_AnnTempRange	BIO5 - BIO6	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO08_MeanTemp_WetQuarter	Average temperature during three month period with highest total precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO09_MeanTemp_DryQuarter	Average temperature during three month period with lowest total precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO10_WarmestQuarterTemp	Mean temperature of three month period with highest average temperature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO11_ColdestQuarterTemp	Mean temperature of three month period with lowest average temperature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO12_AnnPrecip	Total annual precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO13_MaxPrecipMonth	Maximum monthly precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO14_MinPrecipMonth	Minimum monthly precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO15_PrecipSeasonality	Standard deviation of monthly precipitation divided by average annual precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO16_MaxPrecipQuarter	Total precipitation during the wettest three month period	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO17_MinPrecipQuarter	Total precipitation during the driest three month period	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO18_PrecipWarmQuarter	Total precipitation during the warmest three month period	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO19_PrecipColdQuarter	Total precipitation during the coldest three month period	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
CHELSA_gsl_1981_2010	Length of growing season	Karger et al. 2017[3, 4]
CHELSA_kg0_1981-2010 (factor)	Köppen climate classification	Karger et al. 2017[3, 4]
CHELSA_npp_181-2010	Net primary productivity	Karger et al. 2017[3, 4]
CHELSA_pet_MaxPrecipQuarter	Potential evapotranspiration during the wettest three month period	Derived from Karger et al. 2017[3, 4] using 1990 - 2020 climate normals[1]
CHELSA_pet_MaxTempQuarter	Potential evapotranspiration during the warmest three month period	Derived from Karger et al. 2017[3, 4] using 1990 - 2020 climate normals[1]
CHELSA_pet_MinPrecipQuarter	Potential evapotranspiration during the driest three month period	Derived from Karger et al. 2017[3, 4] using 1990 - 2020 climate normals[1]
CHELSA_pet_MinTempQuarter	Potential evapotranspiration during the coldest three month period	Derived from Karger et al. 2017[3, 4] using 1990 - 2020 climate normals[1]
CHELSA_swb_2018	Site water balance	Karger et al. 2017[3, 4]
Distance_to_Saltwater	Distance to the nearest oceanic coastline	US EPA & USGS 2012[5]
Distance_to_Water	Distance to the nearest freshwater flowing or static waterbody	US EPA & USGS 2012[5]
EarthEnv_EVI_cv	Enhanced Vegetation Index coefficient of variation	Tuanmu & Jetz 2015[6]
EarthEnv_EVI_homogeneity	Similarity of Enhanced Vegetation Index between adjacent pixels	Tuanmu & Jetz 2015[6]
elevation_EDNA_2018	Height above sea level (m)	USGS 2018[7]
landCover_NLCD_2019	Aggregated land use and land cover classes 1 - water 2 - developed 3 - barren 4 - forest 5 - shrub/herb 6 - pasture/hay 7 - cultivated 8 - wetland	Multi-Resolution Land Characteristics Consortium 2021[8]
soilTexture_gSSURGO_2019	Aggregated soil texture classes Value Texture 1 Artifacts 2 Coarse sand 3 Loam 4 Clay loam 5 Coarse sandy loam 6 Fine sandy loam 7 Silt loam 8 Sandy loam 9 Loamy fine sand 10 Loamy sand 11 Loamy very fine sand 12 Sand 13 Silty clay 14 Silty clay loam 15 Very fine sandy loam 16 Bedrock 17 Boulders 18 Clay 19 Loamy coarse sand 20 Slightly decomposed plant material 21 Fine sand 22 Cobbles 23 Very fine sand 24 Highly decomposed plant material 25 Moderately decomposed plant material 26 Peat 27 Sandy clay loam 28 Muck 29 Material 30 Cinders 31 Consolidated permafrost 32 Fine gypsum material 33 Fragmental material 34 Gravel 35 Silt 36 Gypsiferous material 38 0 39 Sandy clay 40 Stones 41 Unweathered bedrock 42 Variable 43 Water	United States Department of Agriculture[9]

Note that the majority of these variables have been compiled by Hill et al. (2016)^[10] in the StreamCat dataset. Original StreamCat data sources can be found at the StreamCat Metrics and Definitions page.

Name	Description	Citation
AgKffactWs	Mean soil erodibility (Kf) factor (unitless) of soils within watershed on agricultural land. The Kf factor is used in the Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall.	Hill et al. 2016[10]
Al2O3Ws	Mean % of lithological aluminum oxide (Al2O3) content in surface or near surface geology within watershed	Hill et al. 2016[10]
AreaSqKm	Catchment area, in square kilometers	NHDPlus flowlines[5]
BFIWs	Baseflow is the component of streamflow that can be attributed to ground-water discharge into streams. The Baseflow Index (BFI) is the ratio of baseflow to total flow, expressed as a percentage, within watershed.	Hill et al. 2016[10]
Bioclimatic variables (BIOXX_*) are assigned by calculating the mean values per catchment and extracting the values to flowline center points within those catchments.
BIO01_MeanTemp	Annual mean temperature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO02_MeanDiurnalRange	Mean diurnal range (mean of monthly (max temp - min temp))	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO03_Isothermality	Isothermality ((BIO2/BIO7) x100)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO04_Temp_StDev	Temperature seasonality (standard deviation x100)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO05_MaxTemp	Max temperature of warmest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO06_MinTemp	Min temperature of coldest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO07_AnnTempRange	Temperature annual range (BIO5-BIO6)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO08_MeanTemp_WetQuarter	Mean temperature of wettest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO09_MeanTemp_DryQuarter	Mean temperature of driest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO10_WarmestQuarterTemp	Mean temperature of warmest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO11_ColdestQuarterTemp	Mean temperature of coldest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO12_AnnPrecip	Annual precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO13_MaxPrecipMonth	Precipitation of wettest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO14_MinPrecipMonth	Precipitation of driest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO15_PrecipSeasonality	Precipitation seasonality (coefficient of variation)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO16_MaxPrecipQuarter	Precipitation of wettest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO17_MinPrecipQuarter	Precipitation of driest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO18_PrecipWarmQuarter	Precipitation of warmest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO19_PrecipColdQuarter	Precipitation of coldest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
CanalDensWs	Density of NHDPlus line features classified as canal, ditch, or pipeline within the upstream watershed (km/ square km)	Hill et al. 2016[10]
CaOWs	Mean % of lithological calcium oxide (CaO) content in surface or near surface geology within watershed	Hill et al. 2016[10]
CBNFWs	Mean rate of biological nitrogen fixation from the cultivation of crops in kg N/ha/yr, within watershed	Hill et al. 2016[10]
ClayWs	Mean % clay content of soils (STATSGO) within watershed	Hill et al. 2016[10]
CompStrgthWs	Mean lithological uniaxial compressive strength (megaPascals) content in surface or near surface geology within watershed	Hill et al. 2016[10]
D50_mm_	Median bed-material particle size	Abeshu et al. 2022[11]
DamDensWs	Density of georeferenced dams within watershed (dams/ square km) based on the National Inventory of Dams (https://catalog.data.gov/dataset/national-inventory-of-dams)	Hill et al. 2016[10]
DamNIDStorWs	Total possible volume of all reservoirs (NID_STORA in NID) per unit area of watershed (cubic meters/square km) based on the National Inventory of Dams (https://catalog.data.gov/dataset/national-inventory-of-dams)	Hill et al. 2016[10]
FCODE	Flowline type (connector, canal/ditch, pipelines, stream/river, artificial path)	NHDPlus flowlines[5]
Fe2O3Ws	Mean % of lithological ferric oxide (Fe2O3) content in surface or near surface geology within watershed	Hill et al. 2016[10]
FertWs	Mean rate of synthetic nitrogen fertilizer application to agricultural land in kg N/ha/yr, within watershed	Hill et al. 2016[10]
Frac_Barren	Fraction of area within 100m buffer of flowline classified as barren (NLCD 2019 class 31)	Dewitz 2024[12]
Frac_Cultivated	Fraction of area within 100m buffer of flowline classified as cultivated (NLCD 2019 class 82)	Dewitz 2024[12]
Frac_Developed	Fraction of area within 100m buffer of flowline classified as developed open space, developed low, developed medium, developed high (NLCD classes 21, 22, 23, 24)	Dewitz 2024[12]
Frac_Forest	Fraction of area within 100m buffer of flowline classified as deciduous forest, evergreen forest, or mixed forest (NLCD 2019 classes 41, 42, 43)	Dewitz 2024[12]
Frac_Pasture	Fraction of area within 100m buffer of flowline classified as pasture/hay (NLCD 2019 class 81)	Dewitz 2024[12]
Frac_ShrubHerb	Fraction of area within 100m buffer of flowline classified as shrub/scrub or grassland/herbaceous (NLCD 2019 classes 52, 71)	Dewitz 2024[12]
Frac_Water	Fraction of area within 100m buffer of flowline classified as water (NLCD 2019 class 11)	Dewitz 2024[12]
Frac_Wetland	Fraction of area within 100m buffer of flowline classified as woody wetlands or herbaeous wetlands (NLCD 2019 classes 90, 95)	Dewitz 2024[12]
HUDen2010Ws	Mean housing unit density (housing units/square km) within watershed	Hill et al. 2016[10]
HydrlCondWs	Mean lithological hydraulic conductivity (micrometers per second) content in surface or near surface geology within watershed	Hill et al. 2016[10]
InorgNWetDep_2008Ws	Annual gradient map of precipitation-weighted mean deposition for inorganic nitrogen wet deposition from nitrate and ammonium for 2008 in kg of N/ha/yr, within watershed	Hill et al. 2016[10]
IWI_v2_1	Revised ndex of watershed integrity (version 2.1) based on Johnson et al. 2018 STOTEN	Hill et al. 2016[10]
K2OWs	Mean % of lithological potassium oxide (K2O) content in surface or near surface geology within watershed	Hill et al. 2016[10]
KffactWs	Mean soil erodibility (Kf) factor (unitless) of soils within watershed. The Kf factor is used in the Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall.	Hill et al. 2016[10]
Mainline	1 indicates the waterbody is receives flow from a neighboring HUC12, 0 indicates that it does not	NHDPlus flowlines[5]
ManureWs	Mean rate of manure application to agricultural land from confined animal feeding operations in kg N/ha/yr, within watershed	Hill et al. 2016[10]
MAXELEVSMO	Elevation (m)	NHDPlus flowlines[5]
MaxFlow_QuarterTemp	Average air temperature during the four month period with the highest monthly flow rates	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
MgOWs	Mean % of lithological magnesium oxide (MgO) content in surface or near surface geology within watershed	Hill et al. 2016[10]
MineDensWs	Density of mine sities within watershed (mines/square km)	Hill et al. 2016[10]
MineDensWsRp100	Density of mine sites within watershed and within 100-m buffer of NHD stream lines (mines/square km)	Hill et al. 2016[10]
MinFlow_QuarterTemp	Average air temperature during the four month period with the lowest monthly flow rates	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
Na2OWs	Mean % of lithological sodium oxide (Na2O) content in surface or near surface geology within watershed	Hill et al. 2016[10]
NABD_DensWs	Density of georeferenced dams within watershed (dams/ square km) based on the National Inventory of Dams (https://catalog.data.gov/dataset/national-inventory-of-dams)	Hill et al. 2016[10]
NABD_NIDStorWs	Volume all reservoirs (NID_STORA in NID) within watershed (cubic meters/square km)	Hill et al. 2016[10]
NABD_NrmStorWs	Normal (most common) volume of all reservoirs (NORM_STORA in NID) per unit area of watershed (cubic meters/square km) based on the National Anthropogenic Barrier Dataset (https://www.sciencebase.gov/catalog/item/56a7f9dce4b0b28f1184dabd)	Hill et al. 2016[10]
NARS_Region_int	National Aquatic Resource Surveys (NARS) reporting region. CPL = Coastal Plains; NAP = Northern Appalachia; NLP = Northern Plains; SAP = Southern Appalachia; SPL = Southern Plains; TPL = Temperate Plains; UMW = Upper Midwest; WMT = Western Mountains; XER = Xeric	Hill et al. 2016[10]
NH4_2008Ws	Annual gradient map of precipitation-weighted mean deposition for ammonium ion concentration wet deposition for 2008 in kg of NH4/ha/yr, within watershed	Hill et al. 2016[10]
NO3_2008Ws	Annual gradient map of precipitation-weighted mean deposition for nitrate ion concentration wet deposition for 2008 in kg of NO3/ha/yr, within watershed	Hill et al. 2016[10]
NPDESDensWs	Density of permitted NPDES (National Pollutant Discharge Elimination System) sites within watershed (sites/square km)	Hill et al. 2016[10]
NPDESDensWsRp100	Density of permitted NPDES (National Pollutant Discharge Elimination System) sites within watershed and within a 100-m buffer of NHD stream lines (sites/square km)	Hill et al. 2016[10]
NWs	Mean % of lithological nitrogen (N) content in surface or near surface geology within watershed	Hill et al. 2016[10]
OmCat	Mean organic matter content (% by weight) of soils (STATSGO) within catchment	Hill et al. 2016[10]
OmWs	Mean organic matter content (% by weight) of soils (STATSGO) within watershed	Hill et al. 2016[10]
P2O5Ws	Mean % of lithological phosphorous oxide (P2O5) content in surface or near surface geology within watershed	Hill et al. 2016[10]
PctAg2006Slp20Ws	% of watershed area classified as ag land cover (NLCD 2006 classes 81-82) occurring on slopes greater than or equal to 20%	Hill et al. 2016[10]
PctAlluvCoastWs	% of watershed area classified as lithology type: alluvium and fine-textured coastal zone sediment	Hill et al. 2016[10]
PctBl2016Cat	% of watershed area classified as barren land cover (NLCD 2016 class 31)	Hill et al. 2016[10]
PctBl2016Ws	% of watershed area classified as barren land cover (NLCD 2016 class 31)	Hill et al. 2016[10]
PctBl2016WsRp100	% of watershed area classified as barren land cover (NLCD 2016 class 31) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctCarbResidWs	% of watershed area classified as lithology type: carbonate residual material	Hill et al. 2016[10]
PctColluvSedWs	% of watershed area classified as lithology type: colluvial sediment	Hill et al. 2016[10]
PctConif2016Cat	% of catchment area classified as evergreen forest land cover (NLCD 2016 class 42)	Hill et al. 2016[10]
PctConif2016Ws	% of watershed area classified as evergreen forest land cover (NLCD 2016 class 42)	Hill et al. 2016[10]
PctConif2016WsRp100	% of watershed area classified as evergreen forest land cover (NLCD 2016 class 42) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctCrop2016Cat	% of catchment area classified as crop land use (NLCD 2016 class 82)	Hill et al. 2016[10]
PctCrop2016Ws	% of watershed area classified as crop land use (NLCD 2016 class 82)	Hill et al. 2016[10]
PctCrop2016WsRp100	% of watershed area classified as crop land use (NLCD 2016 class 82) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctDecid2016Cat	% of catchment area classified as deciduous forest land cover (NLCD 2016 class 82)	Hill et al. 2016[10]
PctDecid2016Ws	% of watershed area classified as deciduous forest land cover (NLCD 2016 class 82)	Hill et al. 2016[10]
PctDecid2016WsRp100	% of watershed area classified as deciduous forest land cover (NLCD 2016 class 82) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctEolCrsWs	% of watershed area classified as lithology type: eolian sediment, coarse-textured (sand dunes)	Hill et al. 2016[10]
PctEolFineWs	% of watershed area classified as lithology type: eolian sediment, fine-textured (glacial loess)	Hill et al. 2016[10]
PctFire2010Ws	% forest loss to fire (fire perimeter) within watershed	Hill et al. 2016[10]
PctFire2010WsRp100	% forest loss to fire (fire perimeter) within watershed and within a 100-m buffer of NHD stream lines (sites/square km)	Hill et al. 2016[10]
PctFrst2016Cat	% of catchment area classified as forest land cover (NLCD 2016 classes 42 - evergreen, 43 - mixed, 82 - deciduous)	Adapted from Hill et al. 2016[10]
PctFrst2016Ws	% of watershed area classified as forest land cover (NLCD 2016 classes 42 - evergreen, 43 - mixed, 82 - deciduous)	Adapted from Hill et al. 2016[10]
PctFrst2016WsRp100	% of watershed area classified as forest land cover (NLCD 2016 classes 42 - evergreen, 43 - mixed, 82 - deciduous) within a 100-m buffer of NHD streams	Adapted from Hill et al. 2016[10]
PctFrstLoss2013Ws	% Forest cover loss (Tree canopy cover change) for 2013 within watershed	Hill et al. 2016[10]
PctFrstLoss2013WsRp100	% Forest cover loss (Tree canopy cover change) for 2013 within watershed and within a 100-m buffer of NHD stream lines (sites/square km)	Hill et al. 2016[10]
PctGlacLakeCrsWs	% of watershed area classified as lithology type: glacial outwash and glacial lake sediment, coarse-textured	Hill et al. 2016[10]
PctGlacLakeFineWs	% of watershed area classified as lithology type: glacial lake sediment, fine-textured	Hill et al. 2016[10]
PctGlacTilClayWs	% of watershed area classified as lithology type: glacial till, clayey	Hill et al. 2016[10]
PctGlacTilCrsWs	% of watershed area classified as lithology type: glacial till, coarse-textured	Hill et al. 2016[10]
PctGlacTilLoamWs	% of watershed area classified as lithology type: glacial till, loamy	Hill et al. 2016[10]
PctGrs2016Cat	% of catchment area classified as grassland/herbaceous land cover (NLCD 2016 class 71)	Hill et al. 2016[10]
PctGrs2016Ws	% of watershed area classified as grassland/herbaceous land cover (NLCD 2016 class 71)	Hill et al. 2016[10]
PctGrs2016WsRp100	% of watershed area classified as grassland/herbaceous land cover (NLCD 2016 class 71) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctHay2016Cat	% of catchment area classified as hay land use (NLCD 2016 class 81)	Hill et al. 2016[10]
PctHay2016Ws	% of watershed area classified as hay land use (NLCD 2016 class 81)	Hill et al. 2016[10]
PctHay2016WsRp100	% of watershed area classified as hay land use (NLCD 2016 class 81) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctHbWet2016Cat	% of catchment area classified as herbaceous wetland land cover (NLCD 2016 class 95)	Hill et al. 2016[10]
PctHbWet2016Ws	% of watershed area classified as herbaceous wetland land cover (NLCD 2016 class 95)	Hill et al. 2016[10]
PctHbWet2016WsRp100	% of watershed area classified as herbaceous wetland land cover (NLCD 2016 class 95) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctHydricWs	% of watershed area classified as lithology type: hydric, peat and muck	Hill et al. 2016[10]
PctIce2016Cat	% of catchment area classified as ice/snow land cover (NLCD 2016 class 12)	Hill et al. 2016[10]
PctIce2016Ws	% of watershed area classified as ice/snow land cover (NLCD 2016 class 12)	Hill et al. 2016[10]
PctIce2016WsRp100	% of watershed area classified as ice/snow land cover (NLCD 2016 class 12) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctImp2019Cat	Mean imperviousness of anthropogenic surfaces (NLCD 2019) within catchment	Hill et al. 2016[10]
PctImp2019CatRp100	Mean imperviousness of anthropogenic surfaces (NLCD 2019) within catchment and within a 100-m buffer of NHD stream lines	Hill et al. 2016[10]
PctImp2019Ws	Mean imperviousness of anthropogenic surfaces (NLCD 2019) within watershed	Hill et al. 2016[10]
PctImp2019WsRp100	Mean imperviousness of anthropogenic surfaces (NLCD 2019) within watershed and within a 100-m buffer of NHD stream lines	Hill et al. 2016[10]
PctMxFst2016Cat	% of catchment area classified as mixed deciduous/evergreen forest land cover (NLCD 2016 class 43)	Hill et al. 2016[10]
PctMxFst2016Ws	% of watershed area classified as mixed deciduous/evergreen forest land cover (NLCD 2016 class 43)	Hill et al. 2016[10]
PctMxFst2016WsRp100	% of watershed area classified as mixed deciduous/evergreen forest land cover (NLCD 2016 class 43) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctNonAgIntrodManagVegWs	% Nonagriculture nonnative introduced or managed vegetation landcover type reclassed from LANDFIRE Existing Vegetation Type (EVT), within watershed	Hill et al. 2016[10]
PctNonAgIntrodManagVegWsRp100	% Nonagriculture nonnative introduced or managed vegetation landcover type reclassed from LANDFIRE Existing Vegetation Type (EVT), within watershed and within 100-m buffer of NHD stream lines	Hill et al. 2016[10]
PctNonCarbResidWs	% of watershed area classified as lithology type: non-carbonate residual material	Hill et al. 2016[10]
PctOw2016Cat	% of catchment area classified as open water land cover (NLCD 2016 class 11)	Hill et al. 2016[10]
PctOw2016Ws	% of watershed area classified as open water land cover (NLCD 2016 class 11)	Hill et al. 2016[10]
PctOw2016WsRp100	% of watershed area classified as open water land cover (NLCD 2016 class 11) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctSalLakeWs	% of watershed area classified as lithology type: saline like sediment	Hill et al. 2016[10]
PctShrb2016Cat	% of catchment area classified as shrub/scrub land cover (NLCD 2016 class 52)	Hill et al. 2016[10]
PctShrb2016Ws	% of watershed area classified as shrub/scrub land cover (NLCD 2016 class 52)	Hill et al. 2016[10]
PctShrb2016WsRp100	% of watershed area classified as shrub/scrub land cover (NLCD 2016 class 52) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctShrbHrb2016Cat	% of catchment area classified as shrub/scrub or grass land cover (NLCD 2016 class 52 or 71)	Adapted from Hill et al. 2016[10]
PctShrbHrb2016Ws	% of watershed area classified as shrub/scrub or grass land cover (NLCD 2016 class 52 or 71)	Adapted from Hill et al. 2016[10]
PctShrbHrb2016WsRp100	% of watershed area classified as shrub/scrub or grass land cover (NLCD 2016 class 52 or 71) within a 100-m buffer of NHD streams	Adapted from Hill et al. 2016[10]
PctSilicicWs	% of watershed area classified as lithology type: silicic residual material	Hill et al. 2016[10]
PctUrb2016Cat	% of catchment area classified as urban land use (NLCD 2016 class 21, 22, 23, 24)	Hill et al. 2016[10]
PctUrb2016Ws	% of watershed area classified as urban land use (NLCD 2016 class 21, 22, 23, 24)	Hill et al. 2016[10]
PctUrb2016WsRp100	% of watershed area classified as urban land use (NLCD 2016 class 21, 22, 23, 24) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctUrbHi2016Cat	% of catchment area classified as developed, high-intensity land use (NLCD 2016 class 24)	Hill et al. 2016[10]
PctUrbHi2016Ws	% of watershed area classified as developed, high-intensity land use (NLCD 2016 class 24)	Hill et al. 2016[10]
PctUrbHi2016WsRp100	% of watershed area classified as developed, high-intensity land use (NLCD 2016 class 24) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctUrbLo2016Cat	% of catchment area classified as developed, low-intensity land use (NLCD 2016 class 22)	Hill et al. 2016[10]
PctUrbLo2016Ws	% of watershed area classified as developed, low-intensity land use (NLCD 2016 class 22)	Hill et al. 2016[10]
PctUrbLo2016WsRp100	% of watershed area classified as developed, low-intensity land use (NLCD 2016 class 22) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctUrbMd2016Cat	% of catchment area classified as developed, medium-intensity land use (NLCD 2016 class 23)	Hill et al. 2016[10]
PctUrbMd2016Ws	% of watershed area classified as developed, medium-intensity land use (NLCD 2016 class 23)	Hill et al. 2016[10]
PctUrbMd2016WsRp100	% of watershed area classified as developed, medium-intensity land use (NLCD 2016 class 23) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctUrbOp2016Cat	% of catchment area classified as developed, open space land use (NLCD 2016 class 21)	Hill et al. 2016[10]
PctUrbOp2016Ws	% of watershed area classified as developed, open space land use (NLCD 2016 class 21)	Hill et al. 2016[10]
PctUrbOp2016WsRp100	% of watershed area classified as developed, open space land use (NLCD 2016 class 21) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctWdWet2016Cat	% of catchment area classified as woody wetland land cover (NLCD 2016 class 90)	Hill et al. 2016[10]
PctWdWet2016Ws	% of watershed area classified as woody wetland land cover (NLCD 2016 class 90)	Hill et al. 2016[10]
PctWdWet2016WsRp100	% of watershed area classified as woody wetland land cover (NLCD 2016 class 90) within a 100-m buffer of NHD streams	Hill et al. 2016[10]
PctWetlnd2016Cat	% of catchment area classified as woody wetland or herbaceous wetland land cover (NLCD 2016 class 90 or 95)	Adapted from Hill et al. 2016[10]
PctWetlnd2016Ws	% of watershed area classified as woody wetland or herbaceous wetland land cover (NLCD 2016 class 90 or 95)	Adapted from Hill et al. 2016[10]
PctWetlnd2016WsRp100	% of watershed area classified as woody wetland or herbaceous wetland land cover (NLCD 2016 class 90 or 95) within a 100-m buffer of NHD streams	Adapted from Hill et al. 2016[10]
PermWs	Mean permeability (cm/hour) of soils (STATSGO) within watershed	Hill et al. 2016[10]
Pestic97Ws	Mean pesticide use (kg/km2) in yr. 1997 within watershed	Hill et al. 2016[10]
PopDen2010Ws	Mean population density (people/square km) within watershed	Hill et al. 2016[10]
PopDen2010WsRp100	Mean population density (people/square km) within watershed and within a 100-m buffer of NHD stream lines	Hill et al. 2016[10]
QE_Coldest_Mean	Average flow rate during the coldest three month period of the year	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
QE_Driest_Mean	Average flow rate during the driest three month period of the year	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
QE_MA	Mean annual flow rate	US EPA & USGS 2012[5]
QE_Max	Maximum monthly flow rate	US EPA & USGS 2012[5]
QE_MaxFlow_Quarter	Three month period during which the highest average flow rate is observed	US EPA & USGS 2012[5]
QE_Min	Minimum monthly flow rate	US EPA & USGS 2012[5]
QE_MinFlow_Quarter	Three month period during which the lowest average flow rate is observed	US EPA & USGS 2012[5]
QE_Range	Range of monthly flow rates	US EPA & USGS 2012[5]
QE_StDev	Standard deviation of monthly flow rates	US EPA & USGS 2012[5]
QE_Warmest_Mean	Average flow rate during the warmest three month period of the year	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
QE_Wettest_Mean	Average flow rate during the wettest three month period of the year	US EPA & USGS 2012[5], Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
RckDepWs	Mean depth (cm) to bedrock of soils (STATSGO) within watershed	Hill et al. 2016[10]
RdCrsSlpWtdCat	Density of roads-stream intersections (2010 Census Tiger Lines-NHD stream lines) multiplied by NHDPlusV21 slope within catchment (crossings*slope/square km)	Hill et al. 2016[10]
RdCrsSlpWtdWs	Density of roads-stream intersections (2010 Census Tiger Lines-NHD stream lines) multiplied by NHDPlusV21 slope within watershed (crossings*slope/square km)	Hill et al. 2016[10]
RdCrsWs	Density of roads-stream intersections (2010 Census Tiger Lines-NHD stream lines) within watershed (crossings/square km)	Hill et al. 2016[10]
RdDensWs	Density of roads (2010 Census Tiger Lines) within watershed (km/square km)	Hill et al. 2016[10]
RdDensWsRp100	Density of roads (2010 Census Tiger Lines) within watershed and within a 100-m buffer of NHD stream lines (km/square km)	Hill et al. 2016[10]
RunoffWs	Mean runoff (mm) within watershed	Hill et al. 2016[10]
SandWs	Mean % sand content of soils (STATSGO) within watershed	Hill et al. 2016[10]
Sinuosity	Sinuosity of the flowline geometry, calculated as (flowline length/distance between flowline endpoints)	Adapted from US EPA & USGS 2012[5]
SiO2Ws	Mean % of lithological silicon dioxide (SiO2) content in surface or near surface geology within watershed	Hill et al. 2016[10]
SLOPE	Slope of the flowline from smoothed elevation (unitless)	US EPA & USGS 2012[5]
SN_2008Ws	Annual mean sulfur and nitrogen wet deposition for 2008 within watershed	Hill et al. 2016[10]
StreamCalc	Stream order	US EPA & USGS 2012[5]
SuperfundDensWs	Density of Superfund sites within watershed (sites/square km)	Hill et al. 2016[10]
SuperfundDensWsRp100	Density of Superfund sites within watershed and within a 100-m buffer of NHD stream lines (sites/square km)	Hill et al. 2016[10]
SWs	Mean % of lithological sulfur (S) content in surface or near surface geology within watershed	Hill et al. 2016[10]
Tidal	1 indicates the waterbody is tidal, 0 indicates that it is not	US EPA & USGS 2012[5]
TotDASqKm	Total cumulative area, in square kilometers	US EPA & USGS 2012[5]
TRIDensWs	Density of TRI (Toxic Release Inventory) sites within watershed (sites/square km)	Hill et al. 2016[10]
TRIDensWsRp100	Density of TRI (Toxic Release Inventory) sites within watershed and within a 100-m buffer of NHD stream lines (sites/square km)	Hill et al. 2016[10]
VE_MA	Mean annual velocity	US EPA & USGS 2012[5]
VE_StDev	Standard deviation of monthly velocity	US EPA & USGS 2012[5]
WetIndexCat	Mean Composite Topographic Index (CTI) [Wetness Index] within catchment	Hill et al. 2016[10]
WetIndexWs	Mean Composite Topographic Index (CTI) [Wetness Index] within watershed	Hill et al. 2016[10]
WHABT_v2_1	Habitat provision component score calculated using watershed metrics	Hill et al. 2016[10]
WHYD_v2_1	Hydrologic regulation component score calculated using watershed metrics	Hill et al. 2016[10]
WtDepWs	Mean seasonal water table depth (cm) of soils (STATSGO) within watershed	Hill et al. 2016[10]
WTEMP_v2_1	Temperature regulation component score calculated using watershed metrics	Hill et al. 2016[10]

Note that the majority of these variables have been compiled by Hill et al. (2018)^[13] in the LakeCat dataset. Original LakeCat data sources can be found at the LakeCat Metrics and Definitions page.

Name	Description	Citation
AgKffactCat	Mean of STATSGO Kffactor raster on agricultural land (NLCD 2006) within catchment. The Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall	Hill et al. 2018[13]
AgKffactWs	Mean of STATSGO Kffactor raster on agricultural land (NLCD 2006) within watershed The Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall	Hill et al. 2018[13]
Al2O3Cat	Mean % of lithological aluminum oxide (Al2O3) content in surface or near surface geology within catchment	Hill et al. 2018[13]
Al2O3Ws	Mean % of lithological aluminum oxide (Al2O3) content in surface or near surface geology within watershed	Hill et al. 2018[13]
AREASQKM	Waterbody area (sq km.)	US EPA & USGS 2012[5]
BFIWs	Base flow is the component of streamflow that can be attributed to ground-water discharge into streams. The BFI is the ratio of base flow to total flow, expressed as a percentage, within watershed	Hill et al. 2018[13]
Bioclimatic variables (BIOXX_*) are assigned by calculating the mean values per catchment and extracting the values to waterbody center points within those catchments.
BIO01_MeanTemp	Annual mean temperature	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO02_MeanDiurnalRange	Mean diurnal range (mean of monthly (max temp - min temp))	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO03_Isothermality	Isothermality ((BIO2/BIO7) x100)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO04_Temp_StDev	Temperature seasonality (standard deviation x100)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO05_MaxTemp	Max temperature of warmest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO06_MinTemp	Min temperature of coldest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO07_AnnTempRange	Temperature annual range (BIO5-BIO6)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO08_MeanTemp_WetQuarter	Mean temperature of wettest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO09_MeanTemp_DryQuarter	Mean temperature of driest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO10_WarmestQuarterTemp	Mean temperature of warmest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO11_ColdestQuarterTemp	Mean temperature of coldest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO12_AnnPrecip	Annual precipitation	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO13_MaxPrecipMonth	Precipitation of wettest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO14_MinPrecipMonth	Precipitation of driest month	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO15_PrecipSeasonality	Precipitation seasonality (coefficient of variation)	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO16_MaxPrecipQuarter	Precipitation of wettest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO17_MinPrecipQuarter	Precipitation of driest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO18_PrecipWarmQuarter	Precipitation of warmest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
BIO19_PrecipColdQuarter	Precipitation of coldest quarter	Fick & Hijmans 2017[2], calculated using 1990 - 2020 climate normals[1]
CanalDensWs	Density of NHDPlus line features classified as canal, ditch, or pipeline within the upstream watershed (km/ square km)	Hill et al. 2018[13]
CaOCat	Mean % of lithological calcium oxide (CaO) content in surface or near surface geology within catchment	Hill et al. 2018[13]
CaOWs	Mean % of lithological calcium oxide (CaO) content in surface or near surface geology within watershed	Hill et al. 2018[13]
ClayCat	Mean % clay content of soils (STATSGO) within catchment	Hill et al. 2018[13]
ClayWs	Mean % clay content of soils (STATSGO) within watershed	Hill et al. 2018[13]
CompStrgthWs	Mean lithological uniaxial compressive strength (megaPascals) content in surface or near surface geology within watershed	Hill et al. 2018[13]
Connected	Shows whether or not waterbody is interscted by NHDFlowlines that receive flow from neighboring HUC12s (1 = yes, 0 = no)	US EPA & USGS 2012[5]
DamDensWs	Density of georeferenced dams within watershed (dams/ square km)	Hill et al. 2018[13]
DamNrmStorWs	Volume all reservoirs (NORM_STORA in NID) per unit area of watershed (cubic meters/square km)	Hill et al. 2018[13]
Elevation_m	Average elevation within waterbody	USGS 2014[7]
EPA_AquaticHabitatBin		US EPA & USGS 2012[5]
FCODE	Waterbody type (play, lake/pond, inundation, reservoirs, swamp/marsh, estuary)	US EPA & USGS 2012[5]
Fe2O3Cat	Mean % of lithological ferric oxide (Fe2O3) content in surface or near surface geology within catchment	Hill et al. 2018[13]
Fe2O3Ws	Mean % of lithological ferric oxide (Fe2O3) content in surface or near surface geology within watershed	Hill et al. 2018[13]
FertWs	Mean rate of synthetic nitrogen fertilizer application to agricultural land in kg N/ha/yr, within watershed	Hill et al. 2018[13]
Flowline_NEAR_DIST	Distance to nearest NHD flowline	US EPA & USGS 2012[5]
Frac_Barren	Fraction of area within 100m buffer of waterbody classified as barren (NLCD 2019 class 31)	Dewitz 2024[12]
Frac_Cultivated	Fraction of area within 100m buffer of waterbody classified as cultivated (NLCD 2019 class 82)	Dewitz 2024[12]
Frac_Developed	Fraction of area within 100m buffer of waterbody classified as developed open space, developed low, developed medium, developed high (NLCD classes 21, 22, 23, 24)	Dewitz 2024[12]
Frac_Forest	Fraction of area within 100m buffer of waterbody classified as deciduous forest, evergreen forest, or mixed forest (NLCD 2019 classes 41, 42, 43)	Dewitz 2024[12]
Frac_Pasture	Fraction of area within 100m buffer of waterbody classified as pasture/hay (NLCD 2019 class 81)	Dewitz 2024[12]
Frac_ShrubHerb	Fraction of area within 100m buffer of waterbody classified as shrub/scrub or grassland/herbaceous (NLCD 2019 classes 52, 71)	Dewitz 2024[12]
Frac_Water	Fraction of area within 100m buffer of waterbody classified as water (NLCD 2019 class 11)	Dewitz 2024[12]
Frac_Wetland	Fraction of area within 100m buffer of waterbody classified as woody wetlands or herbaeous wetlands (NLCD 2019 classes 90, 95)	Dewitz 2024[12]
HUDen2010Cat	Mean housing unit density (housing units/square km) within catchment	Hill et al. 2018[13]
HUDen2010Ws	Mean housing unit density (housing units/square km) within watershed	Hill et al. 2018[13]
HydrlCondWs	Mean lithological hydraulic conductivity (micrometers per second) content in surface or near surface geology within watershed	Hill et al. 2018[13]
InorgNWetDep_2008Cat	Annual gradient map of preciptiation-weighted mean deposition for inorganic nitrogen wet deposition from nitrate and ammonium for 2008 in kg of N/ha/yr, within catchment	Hill et al. 2018[13]
InorgNWetDep_2008Ws	Annual gradient map of preciptiation-weighted mean deposition for inorganic nitrogen wet deposition from nitrate and ammonium for 2008 in kg of N/ha/yr, within watershed	Hill et al. 2018[13]
K2OCat	Mean % of lithological potassium oxide (K2O) content in surface or near surface geology within catchment	Hill et al. 2018[13]
K2OWs	Mean % of lithological potassium oxide (K2O) content in surface or near surface geology within watershed	Hill et al. 2018[13]
KffactCat	Mean of STATSGO Kffactor raster within catchment. The Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall	Hill et al. 2018[13]
KffactWs	Mean of STATSGO Kffactor raster within watershed. The Universal Soil Loss Equation (USLE) and represents a relative index of susceptibility of bare, cultivated soil to particle detachment and transport by rainfall	Hill et al. 2018[13]
Length_div_Area	Waterbody perimeter length divided by waterbody area	US EPA & USGS 2012[5]
ManureWs	Mean rate of manure application to agricultural land from confined animal feeding operations in kg N/ha/yr, within watershed	Hill et al. 2018[13]
MgOCat	Mean % of lithological magnesium oxide (MgO) content in surface or near surface geology within catchment	Hill et al. 2018[13]
MgOWs	Mean % of lithological magnesium oxide (MgO) content in surface or near surface geology within watershed	Hill et al. 2018[13]
MineDensCat	Density of mines sites within catchment (mines/square km)	Hill et al. 2018[13]
MineDensWs	Density of mines sites within watershed (mines/square km)	Hill et al. 2018[13]
Na2OCat	Mean % of lithological sodium oxide (Na2O) content in surface or near surface geology within catchment	Hill et al. 2018[13]
Na2OWs	Mean % of lithological sodium oxide (Na2O) content in surface or near surface geology within watershed	Hill et al. 2018[13]
NABD_DensCat	Density of georeferenced dams within catchment (dams/ square km)	Hill et al. 2018[13]
NABD_DensWs	Density of georeferenced dams within watershed (dams/ square km)	Hill et al. 2018[13]
NABD_NrmStorWs	Volume all reservoirs (NORM_STORA in NID) per unit area of watershed (cubic meters/square km)	Hill et al. 2018[13]
NCat	Mean % of lithological nitrogen (N) content in surface or near surface geology within catchment	Hill et al. 2018[13]
NH4_2008Cat	Annual gradient map of preciptiation-weighted mean deposition for ammonium ion concentration wet deposition for 2008 in kg of NH4/ha/yr, within catchment	Hill et al. 2018[13]
NH4_2008Ws	Annual gradient map of preciptiation-weighted mean deposition for ammonium ion concentration wet deposition for 2008 in kg of NH4/ha/yr, within watershed	Hill et al. 2018[13]
NO3_2008Cat	Annual gradient map of preciptiation-weighted mean deposition for nitrate ion concentration wet deposition for 2008 in kg of NO3/ha/yr, within catchment	Hill et al. 2018[13]
NO3_2008Ws	Annual gradient map of preciptiation-weighted mean deposition for nitrate ion concentration wet deposition for 2008 in kg of NO3/ha/yr, within watershed	Hill et al. 2018[13]
NPDESDensWs	Density of permitted NPDES (National Pollutant Discharge Elimination System) sites within watershed (sites/square km)	Hill et al. 2018[13]
NWs	Mean % of lithological nitrogen (N) content in surface or near surface geology within watershed	Hill et al. 2018[13]
OmCat	Mean organic matter content (% by weight) of soils (STATSGO) within catchment	Hill et al. 2018[13]
OmWs	Mean organic matter content (% by weight) of soils (STATSGO) within watershed	Hill et al. 2018[13]
ONOFFNET	Shows whether or not waterbody is interscted by NHDFlowlines (1 = yes, 0 = no)	US EPA & USGS 2012[5]
P2O5Cat	Mean % of lithological phosphorous oxide (P2O5) content in surface or near surface geology within catchment	Hill et al. 2018[13]
P2O5Ws	Mean % of lithological phosphorous oxide (P2O5) content in surface or near surface geology within watershed	Hill et al. 2018[13]
PctAg2006Slp10Ws	% of watershed area classified as ag land cover (NLCD 2006 classes 81-82) occurring on slopes > 10%	Hill et al. 2018[13]
PctAg2006Slp20Ws	% of watershed area classified as ag land cover (NLCD 2006 classes 81-82) occurring on slopes > 20%	Hill et al. 2018[13]
PctAlkIntruVolCat	% of catchment area classified as lithology type: alkaline intrusive volcanic rock	Hill et al. 2018[13]
PctAlkIntruVolWs	% of watershed area classified as as lithology type: alkaline intrusive volcanic rock	Hill et al. 2018[13]
PctAlluvCoastCat	% of catchment area classified as lithology type: alluvium and fine-textured coastal zone sediment	Hill et al. 2018[13]
PctAlluvCoastWs	% of watershed area classified as as lithology type: alluvium and fine-textured coastal zone sediment	Hill et al. 2018[13]
PctCarbResidCat	% of catchment area classified as lithology type: carbonate residual material	Hill et al. 2018[13]
PctCarbResidWs	% of watershed area classified as as lithology type: carbonate residual material	Hill et al. 2018[13]
PctCoastCrsCat	% of catchment area classified as lithology type: coastal zone sediment, coarse-textured	Hill et al. 2018[13]
PctCoastCrsWs	% of watershed area classified as as lithology type: coastal zone sediment, coarse-textured	Hill et al. 2018[13]
PctColluvSedCat	% of catchment area classified as lithology type: colluvial sediment	Hill et al. 2018[13]
PctColluvSedWs	% of watershed area classified as as lithology type: colluvial sediment	Hill et al. 2018[13]
PctEolCrsCat	% of catchment area classified as lithology type: eolian sediment, coarse-textured (sand dunes)	Hill et al. 2018[13]
PctEolCrsWs	% of watershed area classified as as lithology type: eolian sediment, coarse-textured (sand dunes)	Hill et al. 2018[13]
PctEolFineCat	% of catchment area classified as lithology type: eolian sediment, fine-textured (glacial loess)	Hill et al. 2018[13]
PctEolFineWs	% of watershed area classified as as lithology type: eolian sediment, fine-textured (glacial loess)	Hill et al. 2018[13]
PctExtruVolCat	% of catchment area classified as lithology type: extrusive volcanic rock	Hill et al. 2018[13]
PctExtruVolWs	% of watershed area classified as as lithology type: extrusive volcanic rock	Hill et al. 2018[13]
PctFire2010Ws	% Forest loss to fire (fire perimeter) for 2010 within watershed	Hill et al. 2018[13]
PctFrstLoss2013Ws	% Forest cover loss (Tree canopy cover change) for 2013 within watershed	Hill et al. 2018[13]
PctGlacLakeCrsCat	% of catchment area classified as lithology type: glacial outwash and glacial lake sediment, coarse-textured	Hill et al. 2018[13]
PctGlacLakeCrsWs	% of watershed area classified as as lithology type: glacial outwash and glacial lake sediment, coarse-textured	Hill et al. 2018[13]
PctGlacLakeFineCat	% of catchment area classified as lithology type: glacial lake sediment, fine-textured	Hill et al. 2018[13]
PctGlacLakeFineWs	% of watershed area classified as as lithology type: glacial lake sediment, fine-textured	Hill et al. 2018[13]
PctGlacTilClayCat	% of catchment area classified as lithology type: glacial till, clayey	Hill et al. 2018[13]
PctGlacTilClayWs	% of watershed area classified as as lithology type: glacial till, clayey	Hill et al. 2018[13]
PctGlacTilCrsCat	% of catchment area classified as lithology type: glacial till, coarse-textured	Hill et al. 2018[13]
PctGlacTilCrsWs	% of watershed area classified as as lithology type: glacial till, coarse-textured	Hill et al. 2018[13]
PctGlacTilLoamCat	% of catchment area classified as lithology type: glacial till, loamy	Hill et al. 2018[13]
PctGlacTilLoamWs	% of watershed area classified as as lithology type: glacial till, loamy	Hill et al. 2018[13]
PctHydricCat	% of catchment area classified as lithology type: hydric, peat and muck	Hill et al. 2018[13]
PctHydricWs	% of watershed area classified as as lithology type: hydric, peat and muck	Hill et al. 2018[13]
PctImp2019Cat	Mean imperviousness of anthropogenic surfaces within catchment (NLCD 2019)	Hill et al. 2018[13]
PctImp2019Ws	Mean imperviousness of anthropogenic surfaces within watershed (NLCD 2019)	Hill et al. 2018[13]
PctNonAgIntrodManagVegCat	% Nonagriculture nonnative introduced or managed vegetation landcover type reclassed from LANDFIRE Existing Vegetation Type (EVT), within catchment	Hill et al. 2018[13]
PctNonAgIntrodManagVegWs	% Nonagriculture nonnative introduced or managed vegetation landcover type reclassed from LANDFIRE Existing Vegetation Type (EVT), within watershed	Hill et al. 2018[13]
PctNonCarbResidCat	% of catchment area classified as lithology type: non-carbonate residual material	Hill et al. 2018[13]
PctNonCarbResidWs	% of watershed area classified as as lithology type: non-carbonate residual material	Hill et al. 2018[13]
PctSalLakeCat	% of catchment area classified as lithology type: saline like sediment	Hill et al. 2018[13]
PctSalLakeWs	% of watershed area classified as as lithology type: saline like sediment	Hill et al. 2018[13]
PctSilicicCat	% of catchment area classified as lithology type: silicic residual material	Hill et al. 2018[13]
PctSilicicWs	% of watershed area classified as as lithology type: silicic residual material	Hill et al. 2018[13]
PctWaterCat	% of catchment area classified as lithology type: water	Hill et al. 2018[13]
PermCat	Mean permeability (cm/hour) of soils (STATSGO) within catchment	Hill et al. 2018[13]
PermWs	Mean permeability (cm/hour) of soils (STATSGO) within watershed	Hill et al. 2018[13]
PopDen2010Cat	Mean populating density (people/square km) within catchment	Hill et al. 2018[13]
PopDen2010Ws	Mean populating density (people/square km) within watershed	Hill et al. 2018[13]
RckdepCat	Mean depth (cm) to bedrock of soils (STATSGO) within catchment	Hill et al. 2018[13]
RckdepWs	Mean depth (cm) to bedrock of soils (STATSGO) within watershed	Hill et al. 2018[13]
RdCrsWs	Density of roads-stream intersections (2010 Census Tiger Lines-NHD stream lines) within watershed (crossings/square km)	Hill et al. 2018[13]
RdDensCat	Density of roads (2010 Census Tiger Lines) within catchment (km/square km)	Hill et al. 2018[13]
RdDensWs	Density of roads (2010 Census Tiger Lines) within watershed (km/square km)	Hill et al. 2018[13]
RunoffCat	Mean runoff (mm) within catchment	Hill et al. 2018[13]
RunoffWs	Mean runoff (mm) within watershed	Hill et al. 2018[13]
SandCat	Mean % sand content of soils (STATSGO) within catchment	Hill et al. 2018[13]
SandWs	Mean % sand content of soils (STATSGO) within watershed	Hill et al. 2018[13]
SCat	Mean % of lithological sulfur (S) content in surface or near surface geology within catchment	Hill et al. 2018[13]
Shape_Area	Waterbody surface area	US EPA & USGS 2012[5]
Shape_Length	Waterbody perimeter length	US EPA & USGS 2012[5]
SiO2Cat	Mean % of lithological silicon dioxide (SiO2) content in surface or near surface geology within catchment	Hill et al. 2018[13]
SiO2Ws	Mean % of lithological silicon dioxide (SiO2) content in surface or near surface geology within watershed	Hill et al. 2018[13]
SN_2008Cat	Annual gradient map of preciptiation-weighted mean deposition for average sulfur & nitrogen wet deposition for 2008 in kg of S+N/ha/yr, within catchment	Hill et al. 2018[13]
SN_2008Ws	Annual gradient map of preciptiation-weighted mean deposition for average sulfur & nitrogen wet deposition for 2008 in kg of S+N/ha/yr, within watershed	Hill et al. 2018[13]
SuperfundDensWs	Density of Superfund sites within watershed (sites/square km)	Hill et al. 2018[13]
SWs	Mean % of lithological sulfur (S) content in surface or near surface geology within watershed	Hill et al. 2018[13]
TRIDensWs	Density of TRI (Toxic Release Inventory) sites within watershed (sites/square km)	Hill et al. 2018[13]
WetIndexCat	Mean Composite Topographic Index (CTI)[Wetness Index] within catchment	Hill et al. 2018[13]
WetIndexWs	Mean Composite Topographic Index (CTI)[Wetness Index] within watershed	Hill et al. 2018[13]
WtDepCat	Mean seasonal water table depth (cm) of soils (STATSGO) within catchment	Hill et al. 2018[13]
WtDepWs	Mean seasonal water table depth (cm) of soils (STATSGO) within watershed	Hill et al. 2018[13]

1. PRISM Climate Group, Oregon State University, https://prism.oregonstate.edu, data created November 2021, accessed August 2022.
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