This dataset is part of the National Water Census Water Budget Estimation and Evaluation Project's ongoing development of best estimates of daily historical water budgets for about 100,000 hydrologic units across the United States. In this release, estimates of soil moisture and recharge are added to the already released estimates of streamflow and precipitation. All these estimates are made available per twelve-digit hydrologic unit code watershed as contained in the NHDPlusV2 dataset. As this project progresses, it is expected that a complete closed water budget generated from the same water budget model will succeed this data release. For background on generation of these wate rbudget variables, see: Hay, L.E., 2019, Application of the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System (NHM-PRMS), by HRU Calibrated Version: U.S. Geological Survey data release, https://doi.org/10.5066/P9NM8K8W The water budget variables were converted to a hydrologic unit basis using area-weighted spatial interpolation. All code used for conversions are included as an attachment to this data release. Summary of Files Included: 1) hu12_ids.csv - twelve digit hydrologic unit code identifiers used in all files. 2) timesteps.csv - timesteps used in all files. 3) nhm_recharge.nc - NetCDF version of recharge data 4) nhm_recharge_grid.csv - One timestep per row version of recharge data 5) nhm_recharge_timeseries.csv - One HUC12 per row version of recharge data 6) nhm_soil_moist.nc - NetCDF version of soil moisture data 7) nhm_soil_moisture_grid.csv - One timestep per row version of soil moisture data 8) nhm_soil_moisture_timeseries.csv - One HUC12 per row version of soil moisture data 9) scripts.zip - A reproducible R workflow to create outputs implemented with the drake package.

This dataset is part of the National Water Census Water Budget Estimation and Evaluation Project's ongoing development of best estimates of daily historical water budgets for over 100,000 hydrologic units across the United States. In this release, estimates of actual evapotranspiration and snowpack water equivalent storage are added to the already released estimates of soil moisture, recharge, streamflow, and precipitation. All these estimates are made available per twelve-digit hydrologic unit code watershed as contained in the NHDPlus v2.1 dataset. As this project progresses, it is expected that a complete closed water budget generated from the same water budget model will succeed this data release. For background on generation of these water budget variables, see: Hay, L.E., 2019, Application of the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System (NHM-PRMS), by HRU Calibrated Version: U.S. Geological Survey data release, https://doi.org/10.5066/P9NM8K8W The water budget variables were converted to a HUC12 basis using area-weighted spatial interpolation. All code used for conversions are included as an attachment to this data release. Summary of files included: 1) huc12_ids.csv - twelve digit hydrologic unit (HUC12) code identifiers used in all files 2) timesteps.csv - timesteps used in all files. 3) nhm_eta.nc4 - NetCDF version of actual evapotranspiration data 4) nhm_eta_grid.zip - Zipped CSV with one timestep per row version of actual evapotranspiration data 5) nhm_eta_timeseries.zip - Zipped CSV with one HUC12 per row version of actual evapotranspiration data 6) nhm_snowpack.nc4 - NetCDF version of snowpack water equivalent data 7) nhm_snowpack_grid.zip - Zipped CSV with one timestep per row version of snowpack water equivalent data 8) nhm_snowpack_timeseries.zip - Zipped CSV with one HUC12 per row version of snowpack water equivalent data 9) nhm_recharge.nc4 - NetCDF version of recharge data 10) nhm_recharge_grid.zip - Zipped CSV with one timestep per row version of recharge data 11) nhm_recharge_timeseries.zip - Zipped CSV with one HUC12 per row version of recharge data 12) nhm_soil_moist.nc4 - NetCDF version of soil moisture data 13) nhm_soil_moisture_grid.zip - Zipped CSV with one timestep per row version of soil moisture data 14) nhm_soil_moisture_timeseries.zip - Zipped CSV with one HUC12 per row version of soil moisture data 15) scripts.zip - A reproducible R workflow to create outputs implemented with the drake package

This dataset is part of the National Water Census Water Budget Estimation and Evaluation Project's ongoing development of best estimates of daily historical water budgets for over 100,000 hydrologic units across the United States. In this release, estimates of actual evapotranspiration and snowpack water equivalent storage are added to the already released estimates of soil moisture, recharge, streamflow, and precipitation. All these estimates are made available per twelve-digit hydrologic unit code watershed as contained in the NHDPlus v2.1 dataset. As this project progresses, it is expected that a complete closed water budget generated from the same water budget model will succeed this data release. For background on generation of these water budget variables, see: Hay, L.E., 2019, Application of the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System (NHM-PRMS), by HRU Calibrated Version: U.S. Geological Survey data release, https://doi.org/10.5066/P9NM8K8W The water budget variables were converted to a HUC12 basis using area-weighted spatial interpolation. All code used for conversions are included as an attachment to this data release. Summary of files included: 1) huc12_ids.csv - twelve digit hydrologic unit (HUC12) code identifiers used in all files 2) timesteps.csv - timesteps used in all files. 3) nhm_eta.nc4 - NetCDF version of actual evapotranspiration data 4) nhm_eta_grid.zip - Zipped CSV with one timestep per row version of actual evapotranspiration data 5) nhm_eta_timeseries.zip - Zipped CSV with one HUC12 per row version of actual evapotranspiration data 6) nhm_snowpack.nc4 - NetCDF version of snowpack water equivalent data 7) nhm_snowpack_grid.zip - Zipped CSV with one timestep per row version of snowpack water equivalent data 8) nhm_snowpack_timeseries.zip - Zipped CSV with one HUC12 per row version of snowpack water equivalent data 9) nhm_recharge.nc4 - NetCDF version of recharge data 10) nhm_recharge_grid.zip - Zipped CSV with one timestep per row version of recharge data 11) nhm_recharge_timeseries.zip - Zipped CSV with one HUC12 per row version of recharge data 12) nhm_soil_moist.nc4 - NetCDF version of soil moisture data 13) nhm_soil_moisture_grid.zip - Zipped CSV with one timestep per row version of soil moisture data 14) nhm_soil_moisture_timeseries.zip - Zipped CSV with one HUC12 per row version of soil moisture data 15) scripts.zip - A reproducible R workflow to create outputs implemented with the drake package

This dataset is part of the National Water Census Water Budget Estimation and Evaluation Project's ongoing development of best estimates of daily historical water budgets for over 100,000 hydrologic units across the United States. In this release, estimates of actual evapotranspiration and snowpack water equivalent storage are added to the already released estimates of soil moisture, recharge, streamflow, and precipitation. All these estimates are made available per twelve-digit hydrologic unit code watershed as contained in the NHDPlus v2.1 dataset. As this project progresses, it is expected that a complete closed water budget generated from the same water budget model will succeed this data release. For background on source data and generation of these water budget variables, see nhru_pkwater_equiv.csv and nhru_hru_actet.csv from: Hay, L.E., 2019, Application of the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System (NHM-PRMS), by HRU Calibrated Version: U.S. Geological Survey data release, https://doi.org/10.5066/P9NM8K8W The water budget variables were converted to a HUC12 basis using area-weighted spatial interpolation. All code used for conversions are included as an attachment to this data release. Summary of files included: 1) hu12_ids.csv - twelve digit hydrologic unit (HUC12) code identifiers used in all files 2) timesteps.csv - timesteps used in all files. 3) nhm_eta.nc - NetCDF version of actual evapotranspiration data 4) nhm_eta_grid.csv - One timestep per row version of actual evapotranspiration data 5) nhm_eta_timeseries.csv - One HUC12 per row version of actual evapotranspiration data 6) nhm_snowpack.nc - NetCDF version of snowpack water equivalent data 7) nhm_snowpack_grid.csv - One timestep per row version of snowpack water equivalent data 8) nhm_snowpack_timeseries.csv - One HUC12 per row version of snowpack water equivalent data 9) scripts.zip - A reproducible R workflow to create outputs implemented with the drake package This data release compliments the following related data releases. Soil moisture and recharge: Blodgett, D.L., 2019, Twelve digit hydrologic unit soil moisture and recharge from the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZZAWK4. Streamflow: Russell, A.M., Over, T.M., and Farmer, W.H., 2018, Statistical daily streamflow estimates at HUC12 outlets in the conterminous United States, Water Years 1981-2017: U.S. Geological Survey data release, https://doi.org/10.5066/P9DPSY6G. Precipitation: https://www.sciencebase.gov/catalog/item/52a7bed0e4b0de1a6d2dd0fd

This dataset is part of the National Water Census Water Budget Estimation and Evaluation Project's ongoing development of best estimates of daily historical water budgets for over 100,000 hydrologic units across the United States. In this release, estimates of actual evapotranspiration and snowpack water equivalent storage are added to the already released estimates of soil moisture, recharge, streamflow, and precipitation. All these estimates are made available per twelve-digit hydrologic unit code watershed as contained in the NHDPlus v2.1 dataset. As this project progresses, it is expected that a complete closed water budget generated from the same water budget model will succeed this data release. For background on source data and generation of these water budget variables, see nhru_pkwater_equiv.csv and nhru_hru_actet.csv from: Hay, L.E., 2019, Application of the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System (NHM-PRMS), by HRU Calibrated Version: U.S. Geological Survey data release, https://doi.org/10.5066/P9NM8K8W The water budget variables were converted to a HUC12 basis using area-weighted spatial interpolation. All code used for conversions are included as an attachment to this data release. Summary of files included: 1) hu12_ids.csv - twelve digit hydrologic unit (HUC12) code identifiers used in all files 2) timesteps.csv - timesteps used in all files. 3) nhm_eta.nc - NetCDF version of actual evapotranspiration data 4) nhm_eta_grid.csv - One timestep per row version of actual evapotranspiration data 5) nhm_eta_timeseries.csv - One HUC12 per row version of actual evapotranspiration data 6) nhm_snowpack.nc - NetCDF version of snowpack water equivalent data 7) nhm_snowpack_grid.csv - One timestep per row version of snowpack water equivalent data 8) nhm_snowpack_timeseries.csv - One HUC12 per row version of snowpack water equivalent data 9) scripts.zip - A reproducible R workflow to create outputs implemented with the drake package This data release compliments the following related data releases. Soil moisture and recharge: Blodgett, D.L., 2019, Twelve digit hydrologic unit soil moisture and recharge from the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZZAWK4. Streamflow: Russell, A.M., Over, T.M., and Farmer, W.H., 2018, Statistical daily streamflow estimates at HUC12 outlets in the conterminous United States, Water Years 1981-2017: U.S. Geological Survey data release, https://doi.org/10.5066/P9DPSY6G. Precipitation: https://www.sciencebase.gov/catalog/item/52a7bed0e4b0de1a6d2dd0fd

This data release contains the output of the Irrigation Water Use Estimation Disaggregation and Downscaling Model (IWUEDD) along with the scripts and data resources required to replicate the output results. The IWUEDD is used to estimate monthly irrigation withdrawals and consumptive use for each 12-digit hydrologic unit code (HUC 12) subwatershed in the conterminous United States. The HUC 12-level estimates are separated into groundwater (GW), surface water (SW), groundwater and surface water combined (TW), and consumptive use (CU). The IWUEDD developed monthly estimates by disaggregating and downscaling previously published annual county-level irrigation withdrawal and consumptive use data complied as part of the National Water Use Science Project, National Water Census as presented in U.S. Geological Survey data release, “Estimated use of water in the United States county-level data for 2015” (Dieter and others, 2018).

This data release contains the output of the Irrigation Water Use Estimation Disaggregation and Downscaling Model (IWUEDD) along with the scripts and data resources required to replicate the output results. The IWUEDD is used to estimate monthly irrigation withdrawals and consumptive use for each 12-digit hydrologic unit code (HUC 12) subwatershed in the conterminous United States. The HUC 12-level estimates are separated into groundwater (GW), surface water (SW), groundwater and surface water combined (TW), and consumptive use (CU). The IWUEDD developed monthly estimates by disaggregating and downscaling previously published annual county-level irrigation withdrawal and consumptive use data complied as part of the National Water Use Science Project, National Water Census as presented in U.S. Geological Survey data release, “Estimated use of water in the United States county-level data for 2015” (Dieter and others, 2018).

This data release contains inputs and outputs for hydrologic simulations of the conterminous United States (CONUS) using the National Hydrologic Model (NHM) application of the Precipitation Runoff Modeling System (PRMS) in ASCII and binary format and explanatory graphics in pdf format. These simulations were developed to provide estimates of water availability for historical conditions for the period October 1, 1980 to September 30, 2016 for five different calibration configurations; the first three years of the simulation should be considered the initialization period and should not be used for subsequent analysis. The five versions of model parameters and associated model output included in this data release are described in table 1 and in the Supplemental Information section of this metadata record. Table 2 provides information about the baseline datasets used for model calibration for each of the five parameter configurations. Figure 1 shows a schematic of the multi-step calibration procedure used to develop the model parameters. Table 3 describes the 36 model output variables that are included in the five attached folders. Five .tar folders are named according to the simulation configuration in table 1 and include the 36-model output variable files. Table 4 provides information about the 8,274 streamgage locations that are included in the NHM-PRMS. The NHM-PRMS parameter and control files for each of the five simulations are located on the child pages associated with this data release. The PRMS climate forcing input files for the simulations are in the DAYMET_CBH.zip folder. Summary files by streamgage of measured and simulated streamflow for the byHRU, byHRU_musk, and byHRU_musk_obs simulations are in the Streamgage_location_simulations_5999.zip folder. Any time series data in the model output files prior to the October 1, 1983 start date should be considered part of the model initialization period and should not be used. Please refer to the Supplemental Information element of this metadata record for more information about the model calibration, inputs, outputs, and summaries included in this data release.

This data release contains inputs and outputs for hydrologic simulations of the conterminous United States (CONUS) using the National Hydrologic Model (NHM) application of the Precipitation Runoff Modeling System (PRMS) in ASCII and binary format and explanatory graphics in pdf format. These simulations were developed to provide estimates of water availability for historical conditions for the period October 1, 1980 to September 30, 2016 for five different calibration configurations; the first three years of the simulation should be considered the initialization period and should not be used for subsequent analysis. The five versions of model parameters and associated model output included in this data release are described in table 1 and in the Supplemental Information section of this metadata record. Table 2 provides information about the baseline datasets used for model calibration for each of the five parameter configurations. Figure 1 shows a schematic of the multi-step calibration procedure used to develop the model parameters. Table 3 describes the 36 model output variables that are included in the five attached folders. Five .tar folders are named according to the simulation configuration in table 1 and include the 36-model output variable files. Table 4 provides information about the 8,274 streamgage locations that are included in the NHM-PRMS. The NHM-PRMS parameter and control files for each of the five simulations are located on the child pages associated with this data release. The PRMS climate forcing input files for the simulations are in the DAYMET_CBH.zip folder. Summary files by streamgage of measured and simulated streamflow for the byHRU, byHRU_musk, and byHRU_musk_obs simulations are in the Streamgage_location_simulations_5999.zip folder. Any time series data in the model output files prior to the October 1, 1983 start date should be considered part of the model initialization period and should not be used. Please refer to the Supplemental Information element of this metadata record for more information about the model calibration, inputs, outputs, and summaries included in this data release.

This data release contains inputs for and outputs from hydrologic simulations for the conterminous United States (CONUS) using the Precipitation Runoff Modeling System (PRMS) version 5.1.0 and the USGS National Hydrologic Model infrastructure (NHM, Regan and others, 2018). These simulations were developed to provide estimates of the water budget for the period 1950 to 2010. Specific file types include: 1) input atmospheric forcings of minimum air temperature, maximum air temperature, and daily precipitation accumulation derived from a gridded observation-based dataset developed by Maurer and others (2002), 2) input parameter files for static and dynamic land cover conditions, and 3) output files of simulated water budget components for each hydrologic response unit and stream segment. Figure 1 shows the calibration methodology that was used for the model application (see LaFontaine and others, 2019 for additional information). Table 1 lists the streamgages that are included in the model application. Table 2 lists the calibration datasets that were used in addition to USGS measured streamflow. The first three years of the simulations are considered 'model initialization' and should not be included in any subsequent analsysis.