蔷薇河污染模型建立与生态修复措施

Establishment of Qiangwei River Pollution Model and Ecological Remediation Measures

蔷薇河作为连云港市饮用水源地,其水质状况直接关系到饮水安全。采用MIKE11软件建立蔷薇河水文水动力和水质模型,计算和率定蔷薇河流域污染负荷和水功能区纳污能力,分析蔷薇河流域污染特征和来源。结果表明,蔷薇河流域污染负荷量为COD 17 729 t/a、NH_3-N 1 090 t/a。蔷薇河流域污染物入河量已远超其河道自净能力,主要污染来自农村生活和畜禽养殖污水排放,以及农业生产的化肥农药流失,其中农村生活污染的总分担率高达72%。提出相应的污染治理与控制措施,完善农村污水和生活垃圾的收集处理,推广科学施肥和节水灌溉技术,发展生态农业,实施生物多样性恢复和滨岸带及河口湿地生态修复,以改善蔷薇河流域水质与生态环境。

As the drinking water source of Lianyungang City, the water quality of the Qiangwei River is directly related to the safety of drinking water. So we use the MIKE11 software to build the hydrological hydrodynamic model and water quality model of the Qiangwei River, to calculate and rate the pollution load and water function area pollution capacity of the Qiangwei River basin, and to analyze the pollution characteristics. The results show, the pollution load of the Qiangwei River basin is COD 17 729 t/a, NH_3-N 1 090 t/a; the amount of pollutants from the Qiangwei River basin has far exceeded its self-purification capacity, and the pollution mainly comes from the rural domestic sewage discharge, livestock and poultry breeding and chemical fertilizer pesticide loss. The total load rate of rural life pollution was the highest, reaching 72%. We put forward the pollution control measures, including improving the collection and treatment of rural sewage and domestic waste, and popularizing the technology of scientific fertilization and water saving irrigation, developing the ecological agriculture, implement the measures of biological diversity restoration and ecological remediation of coastal zone and estuary wetland, to improve the water quality and ecological environment in the Qiangwei River basin.