[1]熊昱,方怒放,史志华.基于可变源区理论的SCS模型改进及其应用[J].水土保持研究,2017,24(02):289-292,299.
　XIONG Yu,FANG Nufang,SHI Zhihua.Application of Improved SCS Model Based on Variable Source Area[J].Research of Soil and Water Conservation,2017,24(02):289-292,299.
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基于可变源区理论的SCS模型改进及其应用

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年02期 页码: 289-292,299 栏目: 出版日期: 2017-04-28
Title:
Application of Improved SCS Model Based on Variable Source Area
作者:
熊昱1, 方怒放2, 史志华1,2
1. 华中农业大学 资源与环境学院, 武汉 430070;
2. 中国科学院 水利部 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100
Author(s):
XIONG Yu1, FANG Nufang2, SHI Zhihua1,2
1. College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
降雨; 径流; 小流域; 可变源区; SCS模型
Keywords:
rainfall; runoff; small watershed; variable source area; SCS model
分类号:
S157.1
摘要:
准确预测小流域的径流量是进行侵蚀预报和水土流失治理的关键。SCS-CN是预测无径流观测资料地区降雨产流的常见模型之一。针对传统SCS-CN模型不能准确识别饱和产流源区问题，基于可变源区理论对SCS-CN模型进行了改进，并以三峡地区王家桥小流域50场降雨径流数据为例，对基于可变源区的SCS方法（CN-VSA）、初损率λ=0.2和改进的λ=0.05的SCS-CN方法进行了对比。结果表明：SCS-CN0.2方法不适合该流域，CN-VSA和SCS-CN0.05方法均能较好模拟结果，CN-VSA方法决定系数为0.802，效率系数是0.651，SCS-CN0.05方法分别是0.763，0.766，但是SCS-CN0.05方法不能准确定位饱和产流源区。在流域综合治理的水文效应评估中，饱和产流源区准确定位十分重要，改进的CN-VSA方法能定位产流源区，在实践中有着重要意义。
Abstract:
Estimation of direction runoff is essential for soil erosion prediction and soil and water conservation plan. The Soil Conservation Service Curve Number (SCS-CN) method developed by the USDA-Soil Conservation Service is widely used for the estimation of direct runoff for a given rainfall event from small watersheds due to its low input data requirements and its simplicity. However, it is limited in predicting the location of source areas. We present an improved SCS method based on variable source area (VSA). It was applied to Wangjiaqiao watershed to analyze 50 measured rainfall-runoff events. The CN-VSA method was compared with the traditional SCS-CN0.2 method and the SCS-CN0.05 method. The results indicated that both the CN-VSA method and the SCS-CN0.05 method could well predict runoff volume. The R2 of the CN-VSA method was 0.802 and efficiency coefficient (E) was 0.651 compared with 0.763 and 0.766 for the SCS-CN0.05 method. Locations of runoff source area varied during individual storm events when using the CN-VSA method. The CN-VSA method can be used for comprehensive management and hydrologic effects assessment of small watershed.

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备注/Memo

收稿日期:2016-09-18;改回日期:2016-10-09。
基金项目:国家杰出青年科学基金项目“土壤水蚀机理与过程模拟”（41525003）
作者简介:熊昱(1992-),女,湖北武汉人,硕士研究生,研究方向为流域管理。E-mail:pengshi@mail.hzau.edu.cn
通讯作者:史志华(1970-),男,湖北竹溪人,教授,研究方向为土壤侵蚀。E-mail:pengshi@mail.hzau.edu.cn

更新日期/Last Update: 1900-01-01