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DS-777 Spatial Location of Gages with Total Flow and estimated Base Flow, for the Predevelopment Simulation Period for the Northern High Plains Groundwater-Flow Model in Parts of Colorado, Kansas, Nebraska, South Dakota, and Wyoming

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: February 10, 2026 | Last Modified: 2020-11-17T00:00:00Z
Baseflow is the portion of streamflow derived from groundwater flow. It is an important component of the groundwater budget, and can be estimated using known total streamflow at given points through time. Daily streamflow data was collected from 25 streamflow gaging stations across the northern High Plains Groundwater Availability Study (NHPGAS) area from the National Water Information System (NWIS) and the Nebraska Department of Natural Resources Stream Gaging Data Bank. The data from each site was processed using the BFI program, version 4.15 (Wahl and Wahl, 2007) to determine the baseflow component of total streamflow at each site. The average daily baseflow was computed for the year of 1940. The resulting baseflow values were applied as calibration targets to the end of the predevelopment model.

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