太湖流域河网地区湖泊氮磷污染负荷研究——以江苏常熟南湖荡为例  

Study of pollution load of nitrogen and phosphorus in lake of Taihu Basin river-net area:a case study of Nanhudang Lake in Changshu City,Jiangsu Province

作　　者：张丹蓉[1] 邵广文[1] 管仪庆[1] 张其成[1] 冒甘泉 叶彬 

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]卡尔斯鲁厄理工学院气象与气候研究所,德国卡尔斯鲁厄82467 [3]大唐观音岩水电开发有限公司,湖北攀枝花617012

出　　处：《水资源保护》2016年第2期106-110,共5页Water Resources Protection

摘　　要：以江苏常熟市南湖荡为例,对当地主要的农业面源、水产养殖面源、畜禽养殖面源、居民生活面源的污染物排放量及南湖荡水体的TN、TP允许纳污量进行估算,并对南湖荡水体的富营养化现状进行评价。结果表明:南湖荡的TN、TP排放量分别为113.8 t/a和18.3 t/a,水体的TN、TP允许纳污量分别为134.4 t/a和6.4 t/a。TN排放量已经十分接近水体TN允许纳污量的上限值,TP排放量已经远远超出水体TP允许纳污量。因此,南湖荡水质已经处在从Ⅲ类水向Ⅳ类水过渡阶段。依据计算得到的富营养化参数,可认为南湖荡处于中度富营养化状态。研究结果可为南湖荡的污染控制和管理提供依据,研究思路和方法可为同类湖泊治理与保护工作提供参考。Taking Nanhudang Lake in Changshu City, Jiangsu Province as an example, the pollution discharge of non-point pollution sources, including agriculture, aquaculture, livestock, poultry breeding, and resident living sewage, was estimated. The allowable discharge of TN and TP in Nanhudang Lake was estimated and the eutrophication status in Nanhudang Lake was assessed. The results show that the current discharge of TN and TP are 113.8 tons per year and 18.3 tons per year, respectively, and the allowable discharge of TN and TP are 134.4 tons per year and 6.4 tons per year, respectively. The discharge of TN is close to the allowable discharge of TN and the discharge of TP goes far beyond the allowable discharge of TP. The water quality of Nanhudang Lake is in the transition phase from the water standard m to water standard IV. According to the calculated eutrophication parameters, Nanhudang Lake is in the moderate eutrophication phase. The results can provide supports for the pollution control and management of Nanhudang Lake, and the research strategies and methods can provide reference for similar lakes.

关 键 词：污染负荷 允许纳污量 富营养化 总氮 总磷 南湖荡 

分 类 号：X52[环境科学与工程—环境工程]