Technique for estimating flood-peak discharges and frequencies on rural streams in Illinois
Water-Resources Investigations Report
87-4207
By: G.W. Curtis
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Abstract
Flood-peak discharges and frequencies are presented for 394 gaged sites in Illinois, Indiana, and Wisconsin for recurrence intervals ranging from 2 to 100 years. A technique is presented for estimating flood-peak discharges at recurrence intervals ranging from 2 to 500 years for nonregulated streams in Illinois with drainage areas ranging from 0.02 to 10,000 square miles. Multiple-regression analyses, using basin characteristics and peak streamflow data from 268 of the 394 gaged sites, were used to define the flood-frequency relation. The most significant independent variables for estimating flood-peak discharge are drainage area, slope, rainfall intensity and a regional factor. Examples are given to show a step-by-step procedure in calculating a 50-year flood for a site on an ungaged stream, a site at a gaged location, and a site near a gaged location. (USGS)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Technique for estimating flood-peak discharges and frequencies on rural streams in Illinois |
| Series title | Water-Resources Investigations Report |
| Series number | 87-4207 |
| DOI | 10.3133/wri874207 |
| Edition | - |
| Year Published | 1987 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | v, 79 p. :ill., maps ;28 cm. |
| Google Analytic Metrics | Metrics page |