This report describes methods for estimating flood-peak discharges having 2- to 50-year recurrence intervals on North Dakota streams draining less than 100 square miles ( 259 square kilometres). For gaged sites, frequency estimates are provided directly. For ungaged sites, flood peaks are estimated from multiple-regression equations using drainage-area size and, in two regions, soil-infiltration index as estimating variables. Nomographs provide simple solutions for the equations for flood-peak discharges having recurrence intervals of 10, 25, and 50 years. The methods described are not applicable to streams draining urban areas or basins affected by man-made regulation.
Information is also provided on the maximum flood magnitude experienced.
Additional publication details
|Publication Subtype||USGS Numbered Series|
|Title||Magnitude and frequency of floods in small drainage basins in North Dakota|
|Series title||Water-Resources Investigations Report|
|Publisher||U.S. Geological Survey|
|Contributing office(s)||North Dakota Water Science Center, Dakota Water Science Center|
|Description||Report: iv, 24 p.; 2 Plates: 23.94 x 17.17 inches and 23.84 x 17.07 inches|
|Online Only (Y/N)||Y|
|Additional Online Files (Y/N)||Y|
|Google Analytic Metrics||Metrics page|