| Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary |
|---|---|---|---|---|---|---|---|
| identifier | gauge_id | catchment identifier (eight-digit USGS hydrologic unit code) | HDCN-2009 | - | - | Reference Fabric POIs | - |
| identifier | HUC2 | region (two-digit USGS hydrologic unit code) | NHDPlusV2/WBD | - | - | Reference Fabric VPUs | VPU |
| identifier | gauge_name | gauge name, followed by the state | HDCN-2009 | - | - | Mainstem ID | - |
| identifier | gauge_lat | gauge latitude | HDCN-2009 | - | - | Outlet X | - |
| identifier | gauge_long | gauge longitude | HDCN-2009 | - | - | Outlet Y | - |
| Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary |
|---|---|---|---|---|---|---|---|
| climatology | p_mean | mean daily precipitation | N15 Daymet 1km Daily - 1 October 1989 to 30 September 2009 | mm/day | basin mean | Gridmet 4km PR | basin mean |
| climatology | pet_mean | mean daily PET | N15 using Priestley–Taylor formulation calibrate=d for each catchment | mm/day | basin mean | Gridmet 4km PET | basin mean |
| climatology | p_seasonality | seasonality and timing of precipitation | N15 Daymet 1km Daily | - | estimated using sine curves to represent the annual temperature and precipitation cycles w/ Eq. (14) in Woods et al. (2009) | Gridmet 4km Daily | Eq. (14) in Woods et al. (2009) |
| climatology | frac_snow | fraction of precipitation falling as snow | N15 Daymet 1km Daily | - | basin mean | Gridmet 4km PR / Jennings | basin mean |
| climatology | aridity | aridity | N15 Daymet 1km Daily
[pet_mean/p_mean] |
- | basin mean - ratio of mean PET to mean precipitation | Gridmet 4km Daily | basin mean |
| climatology | high_prec_freq | frequency of high precipitation days | N15 Daymet 1km Daily | days/yr | basin mean - greater or equal to 5 times mean daily PPT | Gridmet 4km Daily | basin mean |
| climatology | high_prec_dur | average duration of high precipitation days | N15 Daymet 1km Daily | days | basin mean | Gridmet 4km Daily | basin mean |
| climatology | high_prec_timing | season during which most high precipitation days | N15 Daymet 1km Daily | season | basin mean - greater or equal to 5 times mean daily PPT | Gridmet 4km Daily | basin mean |
| climatology | low_prec_freq | frequency of low precipitation days | N15 Daymet 1km Daily | days/yr | basin mean - less them 1 mm daily PPT | Gridmet 4km Daily | basin mean |
| climatology | low_prec_dur | average duration of low precipitation days | N15 Daymet 1km Daily | days | basin mean - less them 1 mm daily PPT | Gridmet 4km Daily | basin mean |
| climatology | low_prec_timing | season during which most low precipitation days | N15 Daymet 1km Daily
[pet_mean/p_mean] |
season | basin mean - less them 1 mm daily PPT | Gridmet 4km Daily | basin mean |
| Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary |
|---|---|---|---|---|---|---|---|
| geology | geol_1st_class | most common geologic class in the catchment | Hartmann and Moosdorf (2012) - GLiM | - | basin mean | CONUS Soils | basin mean |
| geology | glim_1st_class_frac | fraction of the catchment area associated with its most common geologic class | Hartmann and Moosdorf (2012) - GLiM | % | basin mean | CONUS Soils | basin mean |
| geology | geol_2nd_class | second most common geologic class in the catchment | Hartmann and Moosdorf (2012) - GLiM | - | basin mean | CONUS Soils | basin mean |
| geology | glim_2nd_class_frac | fraction of the catchment area associated with its second most common geologic class | Hartmann and Moosdorf (2012) - GLiM | % | basin mean | CONUS Soils | basin mean |
| geology | carbonate_rocks_frac | fraction of the catchment area characterized as “carbonate sedimentary rocks” | Hartmann and Moosdorf (2012) - GLiM | % | basin mean | CONUS Soils | basin mean |
| geology | geol_porostiy | subsurface porosity | Gleeson et al. (2014) | GLHYMPS | - | basin mean | CONUS Soils |
| geology | geol_permeability | subsurface permeability (log10) | Gleeson et al. (2014) | GLHYMPS | sq. m | basin geometric mean | CONUS Soils |
| Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary |
|---|---|---|---|---|---|---|---|
| soils | soil_depth_pelletier | depth to bedrock (maximum 50 m) | Pelletier et al. (2016) | m | basin mean | CONUS Soils | basin mean |
| soils | soil_depth_statsgo | soil depth | Miller and White (1998) – STATSGO | m | basin mean | CONUS Soils | basin mean |
| soils | soil_porosity | volumetric porosity | Miller and White (1998) – STATSGO | - | basin mean - volumetric porosity (saturated volumetric water content estimated using a multiple linear regression based on sand and clay fraction for the layers marked as USDA soil texture class and a default value (0.9) for layers marked as organic material; layers marked as water, bedrock, and “other” were excluded) - Table 4 in Cosby etal. (1984); Lawrence and Slater (2008) | CONUS Soils | |
| soils | soil_conductivity | saturated hydraulic conductivity | Miller and White (1998) – STATSGO | cm/h | basin mean - estimated using a multiple linear regression based on sand and clay fraction for the layers marked as USDA soil texture class and a default value (36 cm h) Table 4 in Cosby etal. (1984); Lawrence and Slater (2008) | CONUS Soils | |
| soils | max_water_content | maximum water content | Miller and White (1998) – STATSGO | % | basin mean - combination of porosity and soil_depth_statsgo; layers marked as water, bedrock, and “other” were excluded | CONUS Soils | basin mean |
| soils | sand_frac | sand fraction | Miller and White (1998) – STATSGO | % | basin mean - % of soil material smaller than 2 mm;layers marked as organic material, water, bedrock, and “other” were excluded | CONUS Soils | basin mean |
| soils | clay_frac | clay fraction | Miller and White (1998) – STATSGO | % | basin mean - % of soil material smaller than 2 mm; layers marked as organic material, water, bedrock, and “other” were excluded | CONUS Soils | basin mean |
| soils | water_frac | fraction of the top 1.5 m marked as water (class 14) | Miller and White (1998) – STATSGO | % | basin mean | CONUS Soils | basin mean |
| soils | organic_frac | fraction of soil_depth_statsgo marked as organic material (class 13) | Miller and White (1998) – STATSGO | % | basin mean | CONUS Soils | basin mean |
| soils | other_frac | fraction of soil_depth_statsgo marked as “other” (class 16) | Miller and White (1998) – STATSGO | % | basin mean | CONUS Soils | basin mean |
| Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary |
|---|---|---|---|---|---|---|---|
| terrain | area | catchment area | DEM | sq.km | basin sum | 3DEP 30-m | basin sum |
| terrain | slope_mean | catchment mean slope | DEM | m/km | basin mean | 3DEP 30-m | basin mean |
| terrain | elev_mean | catchment mean elevation | DEM | m | basin mean | 3DEP 30-m | basin mean |
=== ## Landcover | Class | Variable | Data Description | Data Source | units | Summary Function Description | Proposed Source | Proposed Summary | |————-|———————-|———————————————————————————————|————————————————————————–|———|———————————————————————————————————————————————————|—————————————————————-|—————————-| | landcover | frac_forest | forest fraction | N15 – USGS data (NLCD ####) | % | basin mean | NLCD 2019 | basin mean | | landcover | dom_land_cover | dominant land cover (Noah-modified 20-category IGBP-MODIS land cover) | MODIS* | - | basin mode | IGBP-MODIS land cover | basin mode | | landcover | dom_land_cover_frac | fraction of the catchment area associated with the dominant land cover | MODIS* | % | basin mean | IGBP-MODIS land cover | basin mode | | landcover | lai_max | maximum monthly mean of the leaf area index | MODIS 1k 2002-2014 | - | remap noah tbl to mod LC, mean of max - based on 12 monthly means | GLASS | basin mean | | landcover | lai_diff | difference between the maximum and minimum monthly mean of the leaf area index | MODIS* | - | based on 12 monthly means | GLASS | basin mean | | landcover | gvf_max | maximum monthly mean of the green vegetation fraction | MODIS* | - | based on 12 monthly means | GLASS | basin mean | | landcover | gvf_diff | difference between the maximum and minimum monthly mean of the green vegetation fraction | MODIS* | - | based on 12 monthly means | GLASS | basin mean | | landcover | root_depth_XX | root depth percentiles (XX = 50 and 99%) | IGBP landcover | m | remap noah tbl to mod LC - Eq. (2) and Table 2 in Zeng (2001), basin mean | GLASS | basin mean