Twelve-digit hydrologic unit soil moisture, recharge, actual evapotranspiration, and snowpack water equivalent storage from the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System 1980-2016

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.

First posted - June 2019 and July 2020

Revision posted - October 24, 2023
 
Changes in version 2.0
Version 2.0 - A bug in a data procesing workflow used in the two preceding data releases was fixed. The bug caused HUC12 identifiers in files in both data releases to be out of order.

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