Retention Parameter Estimates for Curve Number Runoff Procedure

by W. Carlisle Mills, Southeast Watershed Research Lab, Tifton, United States,
Adrian W. Thomas, Southeast Watershed Research Lab, Tifton, United States,
Anthony L. Dillard, Southeast Watershed Research Lab, Tifton, United States,
Willard M. Snyder, Southeast Watershed Research Lab, Tifton, United States,



Document Type: Proceeding Paper

Part of: Irrigation and Drainage: Saving a Threatened Resource?In Search of Solutions

Abstract:

A technique is developed for computing estimates and associated probabilities of the retention parameter S in the Soil Conservation Service curve number runoff procedure. This technique makes use of rainfall probabilities computed from long term rainfall records and combines them with samples of S computed from individual rainfall/runoff event data from gaged watersheds. Results are estimates and probabilities of S that are not biased toward lower values of S as is the case when only S samples are used. The developed technique is demonstrated with data from a field-size watershed.

Subject Headings: Runoff | Rain water | Probability | Watersheds | Runoff curve number | Parameters (statistics) | Retaining structures

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