江西农业大学学报Issue(3)：670-677,8.DOI:10.13836/j.jjau.2014110
辽河源头区流域农业非点源污染风险评价与关键源区识别
Critical Source Area Identification and Risk Assessment of Agricultural Non-Point Source Pollution of the Source Areas of Liaohe River Watershed
摘要
Abstract
The primary issue of efficiently controlling and managing agricultural non-point source pollu-tion is how to identify critical source areas or the sensitive regions of pollutants in agricultural lands .In this pa-per,under GIS and geostatistics technical means ,based on comprehensive analysis of the source factors and the migration of agricultural non-point sources of risk factors ,the authors identify the impact of non-point source pollution factor ,establish the index system to identify agricultural non-point source pollution risk .The study chose 30 m×30 m grid unit to generate the identification system ,determine the factor weights ,used multifactor analysis to calculate the non-point source pollution risk index of each factor and carried out its quantitative e-valuation .Critical source areas were areas whose risk of non-point source pollution is high .Management control measures reflecting the characteristics of non-point source pollion in the Liaohe River headwaters area were proposed.The results show that:the high risk areas of agricultural non-point source pollution in the watershed or the critical source areas occupies 21.77%of the total drainage area .The critical source areas compose of farmland and sloping land area mainly concentrate in the northeasted ,middle and southern parts of Liaohe Riv-er head waters .The population density ,the amount of livestock and poultry as well as fertilizer levels in these aress are relatively high .关键词
农业非点源污染/GIS/风险评价/辽河源头区流域/关键源区Key words
agricultural nonpoint source pollution/GIS/risk assessment/the source areas of Liaohe river watershed/critical source areas分类
资源环境引用本文复制引用
吕川,张洪钰,齐琳..辽河源头区流域农业非点源污染风险评价与关键源区识别[J].江西农业大学学报,2014,(3):670-677,8.基金项目
国家科技重大专项 （）
