平原河网地区跨界断面污染源影响权重分析——以嘉善县为例

Pollutant Sources Influence Weight of the Trans-boundary Section in Plain River Network——A Case Study in Jiashan County

为解决平原河网区跨界水环境纠纷问题,明确跨界断面水环境污染来源尤为重要.以嘉善县为例,建立嘉善县水环境数学模型,利用区域内、外污染源及点、面污染源对跨界断面影响权重分析方法,通过计算结果分析得出,影响跨界断面水环境的主要因素为研究区域内部的重要点源.利用污染物通量指标,进行区域内部重要点源对每个跨界断面的污染物来源分析,计算得到对跨界断面水环境影响较大的均为距离跨界断面相对位置较近的排放量大的污水处理厂,故通过合理控制跨界断面污染物影响权重最大的重要点源,对解决跨界水环境纠纷问题具有重要意义.

To solve the water environment dispute problem of the trans-boundary section in plain river network,it is particularly important to define the pollutant sources in the trans-boundary section. Taking Jiashan County as a case,a water environment mathematical model in Jiashan County was established. By using the influence weight analysis method of the internal and external pollutant sources and the point and surface pollutant sources in the trans-boundary section,the results of calculation and analysis show that the main factor affecting the water environment of trans-boundary section is the important source of the internal area. The pollutants sources analysis of each trans-boundary section to the important point sources in the internal area was carried out by using pollutant flux index. Results show that the large discharge sewage treatment plant closed to the trans-boundary section of the cross section has a large influence on the water environment of the trans-boundary section. It is of great significance to solve thetrans-boundary water environment dispute problem by rationally controlling the major sources of the greatest influence weight in trans-boundary section.