浙江省安吉县西苕溪流域非点源污染负荷研究  

Non-point Source Pollution Loadings in Xitiaoxi Watershed of Anji County,Zhejiang Province,China

作　　者：吴一鸣[1] 李伟[1] 余昱葳[1] 李若冰[1] 龙碧波[1] 施积炎[1] 

机构地区：[1]浙江大学环境与资源学院环境保护研究所,杭州310030

出　　处：《农业环境科学学报》2012年第10期1976-1985,共10页Journal of Agro-Environment Science

基　　金：国家水体污染控制与治理科技重大专项课题(2012ZX07101-012)

摘　　要：为探究浙江省安吉县西苕溪流域非点源污染现状,运用污染输出系数法对非点源污染负荷进行估算,并应用地理信息系统(GIS)技术对非点源污染负荷的空间分布特征进行分析。结果表明,2007年浙江省安吉县西苕溪流域非点源污染COD、TN、TP、NH3-N输出总量分别为2236.12t、1007.22t、78.11t、82.90t,分别占西苕溪流域污染物总量的71.91%、70.05%、83.52%、23.64%,其中农村生活污水、农林用地和村镇工业废水是COD的主要污染源,农林用地是TN的主要污染源,农村生活垃圾、畜禽养殖和农林用地是TP的主要污染源,畜禽养殖和村镇工业废水是NH3-N的主要污染源。在空间尺度上,非点源污染负荷主要集中在西苕溪流域中下游地区,COD、TP、NH3-N输出量从上游至下游逐渐增加,但TN输出量相近。Nonpoint source pollution has been a major contributor to water pollution in rivers,lakes,and reservoirs of China in recent years.Xitiaoxi waterhed,which is located in the upstream of Taihu watershed,is an important water source for local community.To explore the current status of nonpoint source pollution in Xitiaoxi watershed of Anji County,Zhejiang Province in 2007,the export coefficient method and geographic information system（GIS）were used to estimate the export of nonpoint source pollution loadings and to analyse the spatial distribution of nonpoint source pollution loadings,respectively.The results showed that the total export of chemical oxygen demand（COD）,total nitrogen（TN）,total phosphorus（TP）,ammonia nitrogen（NH 3-N）was 2 236.12 t,1 007.22 t,78.11 t,82.90 t,respectively,accounting for 71.91%,70.05%,83.52%,23.64% of the total amount of pollutants in Xitiaoxi watershed.Moreover,it was found that rural sewage,agricultural and forest lands and rural industrial wastewater were main sources of COD,while agricultural and forest lands was the largest contributor to TN.Most of TP was contributed by rural garbage,livestock and poultry and agricultural and forest lands,and NH 3-N mostly came from livestock and poultry and rural industrial wastewater.Spatially,the nonpoint source pollution loadings were mainly concentrated in midstream and downstream areas of Xitiaoxi watershed.The exports of nutrients such as COD and TP and NH 3-N increased contantly from upstream to downstream areas while TN had similar exports.These results were supposed to provide scientific decision-making basis for the management of water quality of Xitiaoxi watershed.

关 键 词：输出系数法 地理信息系统 西苕溪流域 非点源污染 

分 类 号：X522[环境科学与工程—环境工程]