| Property | Value |
|---|---|
| Dataset Code | bsflow |
| Dataset Title | Baseflow |
| Institution(s) | USGS |
| Date Accessed | 2025-07-02 |
| Update Frequency | None Planned |
| Native Geospatial Resolution | huc12 |
| SAWS Geospatial Resolutions | county, state, huc8, huc6, huc4, huc2 |
| Time Horizon | Year: (2009, 2020, 1) Month: (1, 12, 1) |
| Source Link | https://www.sciencebase.gov/catalog/item/66fd7083d34edc655a85f049 |
| Download Link | https://prod-is-usgs-sb-prod-content.s3.amazonaws.com/66fd7083d34edc655a85f049/nhm_wrf_ensemble_baseflow_mm.csv?AWSAccessKeyId=AKIAI7K4IX6D4QLARINA&Expires=1751568334&Signature=IDdhoJbLQvvmqY1Q3WPHYzEeHW4%3D |
| Citation | Martinez, A.J., Padilla, J.A., and Gorski, G., 2025, Monthly ensemble outputs from the National Hydrologic Model Precipitation-Runoff Modeling System and the Weather Research and Forecasting model hydrologic modeling system for the conterminous United States, Alaska, Hawaii, and Puerto Rico for water years 2010–2020: U.S. Geological Survey data release, https://doi.org/10.5066/P1RBMDUT. |
| Column Name | Description | Scale | Units |
|---|---|---|---|
| Ensemble Baseflow | the component of total streamflow that is derived from subsurface sources with generally longer travel times than quickflow | continuous (≥0) | mm |
| Name | Code | Description | Scale | Units | Applicable Parameters |
|---|---|---|---|---|---|
| Baseflow | baseflow | The component of total streamflow that is derived from subsurface sources with generally longer travel times than quickflow. Baseflow sustains streamflow when no immediate precipitation has occurred and is a mixture of water sourced from deep or shallow groundwater and/or soil moisture. | continuous (≥0) | mm | all |
None
As part of its Integrated Water Availability Assessment, USGS generated estimated baseflow values at the HUC-12 resolution for monthly time steps from October 2009 to September 2020. We first aggregate these values to the HUC-8 resolution using an areally weighted averaging transformation before converting to the other SAWS resolutions.