奎河徐州段水环境现状评价及对策

通过对奎河徐州段水环境现状的调查分析,结果表明,奎河徐州段水污染的主要原因是此区域内排放的大量工业废水和生活污水及农业面源污染。残留在土壤中的农田养分和化学物质经淋洗进入奎河,其中氮、磷、钾等营养元素使藻类及其他需氧生物大量繁殖,需氧有机物的增加又导致了BOD5增高和DO浓度下降,是造成徐州段范围内污染严重的主要原因;并有针对性地提出了集中治理生活污水,"关、停、并、转、迁"工业污染,建立人工湿地,生态隔离和河道曝气改善农业污染,中水回用等相应的可持续利用整改方案。

Evaluation and Countermeasures of Water Environment Actuality of Kui River in Xuzhou

The water environment actuality of Kui River in Xuzhou were investigated and analyzed.The results showed that the main causes of water pollution of Kui River in Xuzhou were the emission of a large number of domestic sewage and industrial wastewater,agricultural non-point source pollution in this region.The residues of farmland nutrients and chemical substances in soil entered into Kui River through leaching.The nutrient elements such as nitrogen,phosphorus and potassium caused the mass propagation of algae and other aerobic organisms.Then the increase of aerobic organisms led to the increase of BOD5 and the decrease of DO concentration,which were the main reasons that caused the serious pollution in the range of Xuzhou Section.The corresponding rectification program for the sustainable use of Kui River was put forward,including treating the domestic sewage,to stop/merge/transfer/move the industrial pollution,to improve the agricultural pollution by establishing the artificial wetland,the ecological isolation and river aeration,to reuse of intermediate water and so on.