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基于GIS的伊通河流域农业非点源污染风险评估
引用本文:李潇瀚,王瑞,卞建民,韦昊. 基于GIS的伊通河流域农业非点源污染风险评估[J]. 中国水土保持, 2012, 0(1): 33-35
作者姓名:李潇瀚  王瑞  卞建民  韦昊
作者单位:1. 吉林大学环境与资源学院,吉林长春,130021
2. 黄河水资源保护科学研究所,河南郑州,450004
基金项目:国家自然科学基金项目(41072255);吉林省环保局科技项目(吉环科字第2007-11号)
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。

关 键 词:农业非点源污染  GIS  空间叠加  风险评估  伊通河流域

GIS-Based Risk Assessment of Agricultural Non-Point Source Pollution of Yitong River Basin
Affiliation:LI Xiao-han,WANG Rui,BIAN Jian-min,et al.(College of Environment and Resources,Jilin University,Changchun,Jilin 130021,China)
Abstract: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.
Keywords:agricultural non-point source pollution  GIS  spatial overlap  risk assessment  Yitong River basin
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