A Modified SCS-CN Method: Characterization and Testing

S. Mishra, Vijay Singh, J. Sansalone and V. Aravamuthan

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2003, vol. 17, issue 1, 37-68

Abstract: The Soil Conservation Service Curve Number (SCS-CN) method (SCS,1956) is modified by accounting for the static portion ofinfiltration and the antecedent moisture. A volumetric analysisshows that the ratio of the potential maximum retention (S) tothe precipitation amount versus the runoff factor relation isequivalent to the average suction pressure-moisture contentrelation for a unit rainfall amount and a given soil porosity. Asimple spreadsheet procedure is suggested for determining S withuse of a 5-day antecedent precipitation amount. The modifiedmethod is found to perform well on the same data sets as used inthe National Engineering Handbook (SCS, 1971). Copyright Kluwer Academic Publishers 2003

Keywords: modified SCS-CN method; moisture diffusivity; runoff factor; SCS-CN method; soil sorptivity; suction pressure-moisture content relation (search for similar items in EconPapers)
Date: 2003
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Citations: View citations in EconPapers (4)

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DOI: 10.1023/A:1023099005944

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