| Abstract: | The U.S. Geological Survey, in cooperation with the Texas Department of Transportation, has developed a computer program to estimate peak-streamflow frequency for ungaged sites in natural basins in Texas. Peak-streamflow frequency refers to the peak streamflows for recurrence intervals of 2, 5, 10, 25, 50, and 100 years. Peak-streamflow frequency estimates are needed by planners, managers, and design engineers for flood-plain management; for objective assessment of flood risk; for cost-effective design of roads and bridges; and also for the desin of culverts, dams, levees, and other flood-control structures. The program estimates peak-streamflow frequency using a site-specific approach and a multivariate generalized least-squares linear regression. A site-specific approach differs from a traditional regional regression approach by developing unique equations to estimate peak-streamflow frequency specifically for the ungaged site. The stations included in the regression are selected using an informal cluster analysis that compares the basin characteristics of the ungaged site to the basin characteristics of all the stations in the data base. The program provides several choices for selecting the stations. Selecting the stations using cluster analysis ensures that the stations included in the regression will have the most pertinent information about flooding characteristics of the ungaged site and therefore provide the basis for potentially improved peak-streamflow frequency estimation. An evaluation of the site-specific approach in estimating peak-streamflow frequency for gaged sites indicates that the site-specific approach is at least as accurate as a traditional regional regression approach. |
| Genre: | USGS Numbered Series |
| ProdID: | 25991 |
| Citation Author: | Asquith, William H.; Slade, R. M., Jr. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iii, 19 p. :ill. ;28 cm. |
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| Citation Publisher: | U.S. Dept. of the Interior, U.S. Geological Survey ;
Branch of Information Services [distributor], |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 99-4172 |
| Citation Search Results Text: | Site-specific estimation of peak-streamflow frequency using generalized least-squares regression for natural basins in Texas; 1999; WRI; 99-4172; Asquith, William H.; Slade, R. M., Jr. |
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| Citation Year: | 1999 |
| Type: | citation/reference |
| Text: | Site-specific estimation of peak-streamflow frequency using generalized least-squares regression for natural basins in Texas; 1999; WRI; 99-4172; Asquith, William H.; Slade, R. M., Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.water.usgs.gov/wri994172 |
| Date Other: | Thu, 1 Feb 2001 00:00 -0600 |
| Publisher: | U.S. Dept. of the Interior, U.S. Geological Survey ;
Branch of Information Services [distributor], |
