| Abstract: | Values of the unit hydrograph parameters time of concentration (TC) and storage coefficient (R) can be estimated for streams in Illinois by a two-step technique developed from data for 98 gaged basins in the State. The sum of TC and R is related to stream length (L) and main channel slope (S) by the relation (TC + R)e = 35.2L0.39S-0.78. The variable R/(TC + R) is not significantly correlated with drainage area, slope, or length, but does exhibit a regional trend. Regional values of R/(TC + R) are used with the computed values of (TC + R)e to solve for estimated values of time of concentration (TCe) and storage coefficient (Re). The use of the variable R/(TC + R) is thought to account for variations in unit hydrograph parameters caused by physiographic variables such as basin topography, flood-plain development, and basin storage characteristics. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 27386 |
| Citation Author: | Graf, Julia B.; Garklavs, George; Oberg, Kevin A. |
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| Citation Edition: | WRI/OFR |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 10 p. :ill., map ;29 cm. |
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| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 82-22 |
| Citation Search Results Text: | A technique for estimating time of concentration and storage coefficient values for Illinois streams; 1982; WRI; 82-22; Graf, Julia B.; Garklavs, George; Oberg, Kevin A. |
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| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | A technique for estimating time of concentration and storage coefficient values for Illinois streams; 1982; WRI; 82-22; Graf, Julia B.; Garklavs, George; Oberg, Kevin A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
