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A modified SCS-CN method: Characterization and testing

delete2003-01-01
delete86
PRE
AI
S
Santosh Kr. Mishra
V
Vijay P. Singh
J
John J. Sansalone
A
Aravamuthan, V
DOI：10.1023/A:1023099005944delete
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Abstract

Abstract

En 中文
The Soil Conservation Service Curve Number (SCS-CN) method (SCS, 1956) is modified by accounting for the static portion of infiltration and the antecedent moisture. A volumetric analysis shows that the ratio of the potential maximum retention (S) to the precipitation amount versus the runoff factor relation is equivalent to the average suction pressure-moisture content relation for a unit rainfall amount and a given soil porosity. A simple spreadsheet procedure is suggested for determining S with use of a 5-day antecedent precipitation amount. The modified method is found to perform well on the same data sets as used in the National Engineering Handbook (SCS, 1971).
Keywords:
modified SCS-CN method
moisture diffusivity
runoff factor
SCS-CN method
soil sorptivity
suction pressure-moisture content relation

Journal

Water Resources Management cover
Water Resources Management
IF:
4.7
Papers:
8.1K
Citations:
1.6W

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