Title: The runoff curve number of SCS-CN method in Beijing
Abstract: Soil Conservation Service curve number(SCS-CN) is widely used to calculate runoff because it only needs one parameter—runoff curve number(CN) which reflects the soil and landuse characteristics.The purpose of this study is to identify the curve number in the SCS-CN method in Beijing.The rainfall and runoff data of 64 runoff plots in three counties of Miyun,Yanqing and Mentougou,were used to calculate runoff curve number.The constant water head method was used to measure the saturated hydraulic conductivity of main soil types and landuse types in Beijing.The empirical equation was used to calculate the saturated hydraulic conductivity of the 64 runoff plots.The saturated hydraulic conductivity was used to determine the hydrologic soil groups of runoff plots in Beijing.The runoff curve numbers under different hydrologic soil groups and landuse types in Beijing were provided.The results show that the hydrologic soil groups could be identified into and B.The B hydrologic soil group covers most parts of Beijing.The curve number was greatly affected by land use,soil conservation measures,land use cover and antecedent moisture condition.When the other conditions remained unchanged,the curve number obtained from Beijing's runoff plots was greater than that provided by Soil Conservation Service.These results can be served as runoff prediction and landuse management.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 16
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