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当前位置: 首页 > 文章 > 基于SCS模型的浅层紫色土柑桔园坡面径流的计算参数确定 土壤 2010,42 (6) 1003-1008
Position: Home > Articles > Parameters Calibration of SCS Method for Calculation of Surface Rainfall Runoff from Slope Citrus Land with Thin Layer of Sandy Loam Purple Soil Soils 2010,42 (6) 1003-1008

基于SCS模型的浅层紫色土柑桔园坡面径流的计算参数确定

作  者：
夏立忠;李运东;马力;杨林章;张祥志
单  位：
中国科学院南京土壤研究所;江苏省环境监测中心
关键词：
SCS;MSCS;浅层紫色土坡地柑桔园;坡面径流计算
摘  要：
利用浅层紫色土坡地柑桔园小区长期试验的降雨径流监测资料,采用SCS方程(Soil Conservation Service Equation)对浅层紫色土坡地柑桔园坡面径流进行计算,表明径流量的计算结果误差很大;反演算获得的曲线参数值与查表对应值差异很大,而与降雨量存在极其显著的二次曲线回归关系。采用建立的二次曲线回归方程计算获得的S值和MSCS(modified SCS equation)曲线方程,对径流量进行推算,结果得到实测数据的验证,计算精度较好。由于浅层沙壤质紫色土坡地土壤侧渗损失较高,不能纳入SCS方程计算获得的地表径流,因此坡面径流量的计算与实测具有较大的差别;产生于坡面径流与降雨统计分析的MSCS方程是对浅层坡地土壤田间尺度坡面径流计算的一个有效探索。
译  名：
Parameters Calibration of SCS Method for Calculation of Surface Rainfall Runoff from Slope Citrus Land with Thin Layer of Sandy Loam Purple Soil
作  者：
XIA Li-zhong1,LI Yun-dong1,MA Li1,YANG Lin-zhang1,ZHANG Xiang-zhi2(1 Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;2 The Environment Monitoring Center of Jiangsu Province,Nanjing 210036,China)
关键词：
SCS,MSCS,Slope citrus land with thin layer of purple soil,Rainfall runoff calculation
摘  要：
Long-term rainfall runoff plot experiment were carried out at slope citrus land of thin layer of purple soil in the three Gorges Region from 2002,and natural rainfall and surface runoff of each plots at each rainfall event were observed.Surface runoff of 37 rainfall events(2004—2007) of each plots were calculated by SCS method and MSCS method(modified SCS method),and MSCS calculation was proved more feasible for assessing surface runoff by the observation,SCS method,however,should be modified.The curve number calculated by rainfall runoff and SCS equation were greatly different from that listed in the handbook of USDA,but were quadratic correlated with rainfall volume.MSCS method,with the CN' deduced by the quadratic model could calculate surface rainfall runoff at rainfall event with higher accuracy,especially when the rainfall volume surpasses 16 mm.MSCS,an empirical model originated from plot observation,is more feasible for surface runoff calculation compared with the original SCS method.

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