Annual peak-flow frequency data from 231 U.S. Geological Survey streamflow-gaging stations in North Dakota and parts of Montana, South Dakota, and Minnesota, with 10 or more years of unregulated peak-flow record, were used to develop regional regressio
Williams-Sether, Tara tjsether@usgs.gov. Regional regression equations to estimate peak-flow frequency at sites in North Dakota using data through 2009. 2015-01-01.