USGS Water Science Center, Minnesota
Low-flow duration statistics for continuous-record sites as well as streamflow measurements for low-flow sites are presented in the following pages. The 1-, 7-, and 30-day low-flow series were determined for 120 continuous-record streamflow stations in Minnesota having at least 20 years of continuous record. The 2-, 5-, 10-, 50-, and 100-year statistics were determined for each series by fitting a log Pearson type III distribution to the data. The results are presented in graphs and tables. Summary data for streamflow measurements made at over 600 low-flow sites are available in a map-based retrieval system. These low-flow data are used by water resource managers and planners for monitoring withdrawals from and discharges to rivers and streams, and for water-supply planning for future needs.
This web-based system, and much of the information contained within, is a result of a cooperative effort between the USGS and the Minnesota Pollution Control Agency.
The methods used to determine the low-flow statistics and to construct the plots of the low-flow frequency curves are described in "Methods Used to Compute Low-Flow-Frequency Characteristics for Continuous-Record Streamflow Stations in Minnesota, 2006".
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U.S. Department of the Interior |
U.S. Geological Survey
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