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Some New Snyder Type Coefficients for Small Watersheds

by Victor L. Zitta, Mississippi State Univ, Mississippi, State, MS, USA,
Timothy J. Hubbard, Mississippi State Univ, Mississippi, State, MS, USA,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract:

Data collected on the Goodwin Creek watershed has produced a continuous hydrologic record from 37 rain gages and runoff record from 14 runoff stations within a drainage area of 8. 26 sq mi. Basin parameters of main channel length, L; and distance along the main channel L//c//a, to a point opposite the centroid of the basin were determined. Values of F. F. Snyder's coefficients C//t and C//p were calculated from standard formulas. For basin #1, Snyder's C//t values ranged from 0. 710 to 1. 228 with a mean value of 0. 894. Values of C//p ranged from 0. 559 to 1. 128 with a mean of 0. 843. For basin #5, Snyder's C//t values ranged from 0. 276 to 2. 173 with a mean of 9 values equal to 1. 18. Values of C//p ranged from 0. 174 to 1. 900 with a mean value of 0. 815. Published values for C//t range from 1. 8 to 2. 2 with no mean value specified. Published values for C//p range from 0. 4 to 0. 8. For both basins, values of C//t tend to be lower and values of C//p tend to be higher than published values.

Subject Headings: Watersheds | Basins | Flow measurement | Water discharge measurement | Runoff | Rainfall-runoff relationships | Rain water

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