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National Water Model V2.1 retrospective for selected NWIS gage locations, (1979-2020)


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Blodgett, D.L., 2022, National Water Model V2.1 retrospective for selected NWIS gage locations, (1979-2020): U.S. Geological Survey data release,


This dataset contains modeled hourly streamflow in cubic meters per second at each of about eighteen thousand selected operational and water-quality stream gage locations. It was assembled from publicly available retrospective V2.1 National Water Model outputs (See NWM Retrospective source info). The streamflow variable was extracted from model output files and the data were reshaped to optimize read performance. The stream gage locations were derived from several ongoing USGS project gages for evaluation of streamflow, water quality, and real-time monitoring, however only National Water Model identifiers and NHDPlusV2.1 catchment outlet locations (as contained in the National Water Model output files) are used to identify model results. [...]


Point of Contact :
David L Blodgett
Originator :
David L Blodgett
Metadata Contact :
David L Blodgett
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Integrated Modeling & Prediction Division
USGS Mission Area :
Water Resources

Attached Files

Click on title to download individual files attached to this item.

2.04 GB application/x-netcdf
scn20-119nwm_v2_1aad.pdf 81.1 KB application/pdf


This dataset, and those preceding it, have been used for several investigations into the performance of the National Water Model's ability to predict (reproduce) historical streamflow and for evaluation of its ability to predict (forecast) future streamflow. Previous versions (V1.2, V2.0) of the same data were also used in an investigation evaluating the predictive power for water quality (nitrogen loads) using the weighted regressions on time, discharge, and seasons method (WRTDS, Additionally, preparation of the dataset was an engineering investigation into creation of NetCDF files and associated data services with desirable data-read performance characteristics.



  • USGS Data Release Products



Additional Information


Type Scheme Key
DOI doi:10.5066/P9K5BEJG

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