Pollution Control Regionalization and Countermeasures in Dongting Lake Area

To control and manage pollution by regions is effective for comprehensive pollution prevention and controlure in the Dongting Lake Area.Based on the analysis of the main pollutants sources in the Dongting Lake Area and the regionalization principles of pollution control,pollution control regionalization in the Dongting Lake Area was discussed,and the corresponding countermeasures were put forward according to pollution load features of different regions.The results show that the main pollutants including nitrogen,phosphorus and CODCr are mostly from agricultural surface source pollution and municipal pollution.The Dongting Lake Area can be divided into three pollution control zones,i.e.,pollution control zone of central cities,comprehensive improvement zone of plain agriculture and ecological conservation zone of mountains/hills.The main pollutants in the above three control zones are mostly from municipal and industrial point sources pollution,farmland runoff and breeding pollution,and livestock breeding and farmland runoff pollution,respectively.The corresponding control strategies proposed on the basis of analysis of the pollution features of the different division zones will be very helpful for environmental pollution prevention and treatment in the Dongting Lake Area.