Identification approaches of critical source area of agricultural non-point source pollution:A review
Identification approaches of critical source area of agricultural non-point source pollution:A review
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发表时间：
2011
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通讯作者：
Jing Guang-hua
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作者：
Jing Guang-hua
非点源污染具有显著的空间变异性，农业非点源污染物流失的临界源区是农业非点源污染控制的关键环节，而农业非点源污染的临界源区是农业非点源污染控制的关键环节。点源污染，采用输出系数法、污染指数法和非点源污染模型等方法，对农田和流域尺度上的CSA进行了识别，并对各种方法的适用性和存在的问题进行了系统的分析，针对目前的研究特点和存在的问题，对今后的研究提出了具体的建议和展望，如野外观测、现有识别方法的结合、多角度识别方法、新技术的应用与集成等。
Non-point source pollution has remarkable spatial variability,and the pollutants coming from several landscape units usually account for the majority of the pollutant loads in a catchment.These landscape units are the critical non-point source pollution areas(CSAs).How to identify the critical source areas of pollutant losses from agricultural lands is very important for the control of agricultural non-point source pollution.The approaches such as export coefficient,pollution index,and non-point source pollution model are adopted to identify the CSAs at field and catchment scales.This paper mainly described the applicability and the problems of the approaches with systematic analysis,and,aiming at the present research characteristics and existing problems,offered the concrete proposals and expectations for the future study,such as field observation,combination of existing identification methods,methods for multi-angle identification,and application and integration of new technologies.