人民黄河2018，Vol.40Issue(4)：9-14,18,7.DOI:10.3969/j.issn.1000-1379.2018.04.003
黄土区SCS-CN模型径流曲线数计算方法研究
Study on Calculation Method of Runoff Curve Number of SCS-CN Model in Loess Area Under Simulated Rainfall
摘要
Abstract
Soil Conservation Service Curve Number(SCS-CN)model developed by the US Department of Agriculture is a more commonly method of calculating runoff. The CN value in the model is a comprehensive parameter reflecting the land use, soil type and soil moisture, and the choice of its value is important for accurately calculating surface runoff. The purpose of this study was to compare the differences in determining CN by using mean method, median method, arithmetic mean method, S logarithmic frequency distribution method and asymptotic method by the rainfall and runoff data from 42 simulated rainfalls in Yangqingchuan,Yangou and Xichuan watersheds,and used the CN value to calculate the simulated runoff depth. Using the methods of mean comparison and the model evaluation were compared the measured runoff depth with the simulated runoff depth by the above five methods,and the optimal calculation method was determined by the maximum optimal principle of relative membership. The results show that the optimal calculation method is the mean value method in Yan-gqingchuan basin,the optimal calculation method of Yangou watershed and Xichuan watershed is the median method, and the CN value of the same land use type determined by the same calculation method is different;Evaluation of grassland and bare land alone,the optimal cal-culation methods of grassland and bare land are the average method and arithmetic mean method,and the optimal calculation method of CN value of different land use types is also different.关键词
相对隶属度/径流深/径流曲线数/SCS-CN模型/黄土区Key words
relative membership/runoff depth/runoff curve number/SCS-CN model/loess area分类
建筑与水利引用本文复制引用
邓景成,高鹏,穆兴民,赵广举,孙文义,田鹏,宋小燕..黄土区SCS-CN模型径流曲线数计算方法研究[J].人民黄河,2018,40(4):9-14,18,7.基金项目
国家重点研发计划项目(2016YFC0501707) （2016YFC0501707）
中国科学院"西部之光"人才培养引进计划项目 （）
国家自然科学基金资助项目(41371277). （41371277）
