Identifying Critical Source Areas for Agricultural
详细信息
- 责任者：Wang Guangqian (State Key Laboratory of Hydroscience and Engineering ; Tsinghua University ; Beijing 100084 ; China) ; Zuo Haifeng
- 刊名：Earth Science Frontiers
- 出版年：2010
- 卷期：17(6)
- 关键词：水源地 ; water source field ; 污染源 ; pollution source ; 河南 ; Henan Province
- 页码：p.13-20
- 图表：10 illus., 1 table, 19 refs.
- 分类号：1800
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
It is the decision basis for management and control of non-point source pollution that to identify the critical source areas in a watershed.In this paper, taking the Laoguanhe watershed of Middle Route of the South-to-North Water Diversion (SNWDP) as the case, an identification model of critical source areas for agriculture non-point source pollution in Laoguanhe watershed has been developed in order to evaluate the risk of pollution loss. The results indicate that the high risk areas account for 13.4% of total area of watershed,which are mainly located at middle and upper reaches of watershed. The high risk areas are more nearby main stream and tributary stream of Laoguanhe and a few areas lie in the east and north of Xixia. These areas are the critical source areas of agricultural non-point source pollution in watershed. The highest risk area accounts for 3.75% of total area of watershed, which should be regarded as key harnessing.