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Position: Home > Articles > GIS-Based Risk Assessment of Agricultural Non-Point Source Pollution of Yitong River Basin Soil and Water Conservation in China 2012 (1) 33-35+67

基于GIS的伊通河流域农业非点源污染风险评估

作  者：
李潇瀚;王瑞;卞建民;韦昊
单  位：
黄河水资源保护科学研究所;吉林大学环境与资源学院
关键词：
农业非点源污染;GIS;空间叠加;风险评估;伊通河流域
摘  要：
针对伊通河流域农业活动带来的水体污染及水土流失等环境问题,在分析农业非点源污染影响因子的基础上,选择了土地利用类型、土壤孔隙度、年降水量及氮磷排放量等影响因子,建立了农业非点源污染风险评估指标体系,并应用GIS技术,通过工程图绘制和叠加分析,采用幂法计算各因子权值,确定了风险等级指数,最后划分了农业非点源污染风险分区。研究结果表明:在沿河地区和相对发达的城市周边地区,受水田耕作和畜牧饲养等因素影响,农业非点源污染风险较高;在较偏远地区与林区,农业非点源污染风险相对较低。
译  名：
GIS-Based Risk Assessment of Agricultural Non-Point Source Pollution of Yitong River Basin
作  者：
LI Xiao-han,WANG Rui,BIAN Jian-min,et al.(College of Environment and Resources,Jilin University,Changchun,Jilin 130021,China)
关键词：
agricultural non-point source pollution;GIS;spatial overlap;risk assessment;Yitong River basin
摘  要：
In view of existing environmental problems such as water pollution and soil erosion caused by agricultural activities in Yitong River basin,based on the analysis of influence factors of non-point source pollution,the paper chose the affecting factors of land use type,soil porosity,annual precipitation and discharge of nitrogen and phosphorus,and established a risk assessment system for agricultural non-point source pollution.It determined the risk rating indexes by using GIS technology and through engineering drawing and overlay analysis,then divided the risk zoning of agricultural non-point source pollution.The outcomes show that: a) due to the factors of paddy fields and animal husbandry,it has a higher risk of agricultural non-point source pollution along the river and the surrounding areas of relatively developed cities and;b) the risk is relatively lower in the more remote and forest regions.

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