Using Fuzzy Approach to Build a Continuous Relationship between SCS Curve Number and Soil Properties

摘要：

The commonly used Soil Conservation Service CurveNumber (SCS-CN) for surface runoff modeling is largelydependent on the Hydrologic Soil Groups (HSGs) which arederived through aggregation of all soil types into four hydrologicgroups. The derived CN largely mutes away original soil attributedetails. A fuzzy approach refining CN according to soil hydrologicproperties was developed to preserve difference of CN betweendifferent soil types. The proposed approach generally involves threesteps: 1) definition of the typical values of soil attributes for eachHSG; 2) calculation of the fuzzy membership of a given soil type toeach HSG; and 3) calculation of CN for a given soil. Results from asmall watershed show that CN from the proposed methodeffectively retains detailed soil information. The detailed CNderived by the new approach provides possibility for improvingdistributed hydrologic modeling for many commonly usedhydrologic models.

作者: Runkui Li Xianfeng Song Zheng Duan Ming Peng

作者单位: College of Resources and Environment, Graduate University of Chinese Academy of Sciences, Beijing, C Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Te China University of Mining and Technology, Xuzhou, China

会议类型: 国际会议

会议名称: The 19th International Conference on Geoinformatics(第19届国际地理信息科学与技术大会 19 Geoinformatics)

会议地点: 上海

会议语种:英文

页码: 1-5

在线出版日期: 2011-06-01（万方平台首次上网日期，不代表论文的发表时间）