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.

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 5.2.1 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 1979 to 2021 for one pre-calibration and three calibration configurations: 1) calibration by hydrologic response unit (byHRU), 2) calibration by select headwaters (byHW), and 3) calibration by select headwaters with streamflow observations (byHWobs). The three versions of model parameters and associated model output included in this data release are described in Hay and others (2023). 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 Abatzoglou (2013), 2) input parameter files, 3) output files of simulated water budget components for each hydrologic response unit and stream segment, and 4) performance statistics at selected streamgage locations. The first three years of the simulations are considered 'model initialization' and should not be included in any subsequent analysis.

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 5.2.1 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 1980 to 2021 for one pre-calibration and three calibration configurations: 1) calibration by hydrologic response unit (byHRU), 2) calibration by select headwaters (byHW), and 3) calibration by select headwaters with streamflow observations (byHWobs). The four versions of model parameters and associated model output included in this data release are described in Hay and others (2023). The first three years of the simulations are considered “model initialization” and should not be included in any subsequent analysis. Model input files, located on the “Input Data for Hydrologic Simulations of the CONUS using the NHM-PRMS version 1.1, CONUS404BA Calibration” child page, include ASCII formatted PRMS input files of 1) daily time step atmospheric forcings of minimum air temperature (tmin.zip), maximum air temperature (tmax.zip), and precipitation accumulation (precip.zip), 2) four parameter files for the different calibration versions (c404BA_precal_myparam.zip, c404BA_byHRU_myparam.zip, c404BA_byHW_myparam.zip, and c404BA_byHWobs_myparam.zip), 3) a PRMS control file that provides the simulation configuration information (NHM-PRMS_data_release.control), 4) and the PRMS data file that includes time series of streamflow observations (sf_data.zip). Descriptions of model input parameters are included in the parameters_data_dictionary.csv file on this main page. Descriptions of control file parameters are included in the control_data_dictionary.csv file on this main page. Additional information about the model calibration and associated parameters is provided in Hay and others (2023). Additional information about the bias-adjusted CONUS404 (CONUS404BA) atmospheric forcings used for the model application is provided in Zhang and others (2024). Model output files, located on the “Output Data for Hydrologic Simulations of the CONUS using the NHM-PRMS version 1.1, CONUS404BA Calibration” child page, include 18 PRMS output variables for each of the four model simulations corresponding with the four input parameter files (pre-calibration, byHRU, byHW, and byHWobs). Each NetCDF format output file contains daily time step outputs for the period 1980-2021 for each hydrologic response unit or stream segment in the model application. Descriptions of model output variables are included in the output_variables_data_dictionary.csv file on this main page. Streamflow statistics of model performance at selected streamgages are located on the “Simulated streamflow and statistics at streamgages for NHM CONUS CONUS404BA Calibrations, 1980-2021” child page. Each of the four model simulations has an associated csv file of streamflow statistics (gage_stats_c404-bc_.csv) and a NetCDF file of daily streamflow at each streamgage (NHM-PRMS_data_release.nc). Descriptions of the streamflow files are included in the simulated_streamflow_data_dictionary.csv file on this main page.

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 Puerto Rico using the Precipitation Runoff Modeling System (PRMS) version 5.2.1, the USGS National Hydrologic Model infrastructure (NHM, Regan and others, 2018), National Hydrologic Geospatial Fabric version 1.0 (Viger and Bock, 2014), and the Daymet version 4 (Thornton et. al., 2020) atmospheric forcing dataset. These simulations were developed to provide estimates of the water budget for the period 1950 to 2021. The model parameters and associated model output included in this data release are described in Swain and Bellino (2022). Specific data included are: 1) model input files, 2) output files of simulated water budget components for each hydrologic response unit (HRU) and stream segment, and 3) performance statistics at selected streamgage locations. The first three years of the simulations are considered 'model initialization' and should not be included in any subsequent analysis. Model input files, located on the “ Input Data for Hydrologic Simulations of Puerto Rico using the NHM-PRMS, 1950-2021, Daymet version 4” child page, include ASCII formatted PRMS input files of 1) daily time step atmospheric forcings of minimum air temperature (tmin.day), maximum air temperature (tmax.day), precipitation accumulation (precip.day), and humidity (humidity.day), 2) PRMS model parameters (NHM-PRMS.param), 3) a PRMS control file that provides the simulation configuration information (NHM-PRMS_data_release.control), 4) and the PRMS data file that includes time series of streamflow observations (sf_data). Descriptions of model input parameters are included in the parameters_data_dictionary.csv file on this main page. Descriptions of control file parameters are included in the control_data_dictionary.csv file on this main page. Additional information about the model calibration and associated parameters is provided in Swain and Bellino (2022). Model output files, located on the “Output Data for Hydrologic Simulations of Puerto Rico using the NHM-PRMS, 1950-2021, Daymet version 4” child page, include 18 PRMS output variables for the model simulation. Each NetCDF format output file contains daily time step outputs for the period 1950-2021 for each hydrologic response unit or stream segment in the model application. Descriptions of model output variables are included in the output_variables_data_dictionary.csv file on this main page. Streamflow statistics of model performance at selected streamgages are located on this main page (gage_stats_pr.csv).

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 (https://www.usgs.gov/software/precipitation-runoff-modeling-system-prms) and the USGS National Hydrologic Model infrastructure (NHM, Regan and others, 2018). These simulations were developed to provide estimates of the water budget and statistics of streamflow for historical and potential future conditions using atmospheric forcing data from Coupled Model Intercomparison Project phase 5 (CMIP5). Specific file types include: 1) input forcings of minimum air temperature, maximum air temperature, and daily precipitation derived from general circulation models (GCM, table1_GCMs_used.csv), 2) output files of simulated streamflow for each stream segment in the model, 3) GIS files of the model hydrologic response units and stream segments, and 4) a suite of streamflow statistics for each modeled segment. This data release complements data release (https://doi.org/10.5066/P9CVHLMB) which contains historical simulations based on historically observed atmospheric forcings rather than GCM-derived forcings. The same parameter files and model configuration files were used for all model runs and are available in that data release.

The continental United States (CONUS) was modeled to produce simulations of historical and potential future streamflow using the Precipitation-Runoff Modeling System (PRMS) application of the USGS National Hydrologic Model infrastructure (NHM; Regan and others, 2018). This child page specifically contains outputs of streamflow for each stream segment in the model domain and is based on parameterization with static land cover. Simulations were conducted for each of the global circulation model (GCMs) and relative concentration pathway (RCP) presented in table1_GCMs_used.csv.