| Abstract: | This report describes a method to estimate infiltration rates of soils for use in estimating runoff from small basins. Average rainfall intensity is plotted against storm duration on log-log paper. All rainfall events are designated as having either runoff or nonrunoff. A power-decay-type curve is visually fitted to separate the two types of rainfall events. This separation curve is an incipient-ponding curve and its equation describes infiltration parameters for a soil. For basins with more than one soil complex, only the incipient-ponding curve for the soil complex with the lowest infiltration rate can be defined using the separation technique. Incipient-ponding curves for soils with infiltration rates greater than the lowest curve are defined by ranking the soils according to their relative permeabilities and optimizing the curve position. A comparison of results for six basins produced computed total runoff for all events used ranging from 16.6 percent less to 2.3 percent more than measured total runoff. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 29264 |
| Citation Author: | Rankl, James G. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 38 p. :ill., maps ;28 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: | 81-76 |
| Citation Search Results Text: | An empirical method for determining average soil infiltration rates and runoff, Powder River structural basin, Wyoming; 1982; WRI; 81-76; Rankl, James G. |
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| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | An empirical method for determining average soil infiltration rates and runoff, Powder River structural basin, Wyoming; 1982; WRI; 81-76; Rankl, James G. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1981/0076/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1981/0076/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
