| Abstract: | This report presents two techniques to estimate generalized skew coefficients used for log-Pearson Type III peak-streamflow frequency analysis of natural basins in Texas. A natural basin has less than 10 percent impervious cover, and less than 10 percent of its drainage area is controlled by reservoirs. The estimation of generalized skew coefficients is based on annual peak and historical peak streamflow for all U.S. Geological Survey streamflow-gaging stations having at least 20 years of annual peak-streamflow record from natural basins in Texas. Station skew coefficients calculated for each of 255 Texas stations were used to estimate generalized skew coefficients for Texas. One technique to estimate generalized skew coefficients involved the use of regression equations developed for each of eight regions in Texas, and the other involved development of a statewide map of generalized skew coefficients. The weighted mean of the weighted mean standard errors of the regression equations for the eight regions is 0.36 log10 skew units, and the weighted mean standard error of the map is 0.35 log10 skew units. The technique based on the map is preferred for estimating generalized skew coefficients because of its smooth transition from one region of the State to another. |
| Genre: | USGS Numbered Series |
| ProdID: | 27946 |
| Citation Author: | Judd, Linda J.; Asquith, William H.; Slade, Raymond M., Jr. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | iii, 28 p. :ill., maps ;28 cm. |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey ;
Branch of Information Services [distributor], |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 96-4117 |
| Citation Search Results Text: | Techniques to estimate generalized skew coefficients of annual peak streamflow for natural basins in Texas; 1996; WRI; 96-4117; Judd, Linda J.; Asquith, William H.; Slade, Raymond M., Jr. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Techniques to estimate generalized skew coefficients of annual peak streamflow for natural basins in Texas; 1996; WRI; 96-4117; Judd, Linda J.; Asquith, William H.; Slade, Raymond M., Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.water.usgs.gov/wri964117/ |
| Date Other: | Sat, 1 Feb 1997 00:00 -0600 |
| Publisher: | U.S. Geological Survey ;
Branch of Information Services [distributor], |
