| SCS模型中城市地区土壤AMC确定方法的改进及应用研究 |
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| 引用本文： | 王业耀,汪太明,香宝.SCS模型中城市地区土壤AMC确定方法的改进及应用研究[J].水文,2011(4):23-26,57. |
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| 作者姓名： | 王业耀 汪太明 香宝 |
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| 作者单位： | 北京师范大学水科学研究院;中国环境科学研究院; |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2009ZX07207-001); 财政部改革启动专项(GGQD2008-04) |
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| 摘 要： | 估算径流曲线值(CN)是采用SCS模型模拟径流的重要过程,而土壤前期湿润程度(AMC)是估算径流曲线值的主要影响因素,一般采用某次降雨前5d的降雨量来确定土壤AMC。以松花江流域大中小三种规模城市——哈尔滨市、长春市、佳木斯市、吉林市、梅河口市和勃利县城区为例,分析了土壤AMC计算方法的适用范围及存在的问题,并提出了改进方法。研究表明,原方法适合于城区绿地,但不适合于城区其他土地利用类型。对土壤AMC的计算方法进行改进,以某次降雨前5d降雨量与气象蒸发量差值确定其他土地利用类型的土壤AMC,经过对比分析发现,在除绿地外的其他土地利用类型中,改进方法优于原有方法。
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| 关 键 词： | 土壤前期湿润程度 SCS模型 城市地区径流曲线值 年均径流系数 |
Study on Improvement and Application of Urban AMC in SCS Model |
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| WANG Yeyao,WANG Taiming,XIANG Bao.Study on Improvement and Application of Urban AMC in SCS Model[J].Hydrology,2011(4):23-26,57. |
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| Authors: | WANG Yeyao WANG Taiming XIANG Bao |
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| Institution: | WANG Yeyao1,2,WANG Taiming1,XIANG Bao2(1.School of Water Sciences,Beijing Normal University,Beijing 100875,China,2.Chinese Research Academy of Environmental Science,Beijing 100012,China) |
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| Abstract: | Soil antecedent moisture condition(AMC) is one of the important affecting factors on runoff curve number(CN) in the SCS model.Total 5-day antecedent rainfall is always the classification criterion of soil AMC.In this paper,the appropriateness of this criterion in urban area was analyzed.Then,a new method to gain urban soil AMC was discussed,which is associated with total 5-day antecedent rainfall and evaporation.Both of the two criterions were used to calculate urban runoff coefficients in different land-us... |
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| Keywords: | soil antecedent moisture condition SCS model urban runoff curve number mean annual runoff coefficient |
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