池州市长江水系水污染源调查及治理对策

基于DEM数据和地表水系分布,进行池州境内长江水系6条一级支流汇水单元(控制流域)的划分。以2015年作为基准年,进行各单元各类污染源排放和输移入河过程的调查。结果表明:2015年,池州境内长江水系化学需氧量(CODCr)、氨氮(NH+4-N)和总磷(TP)的入河总量分别达到18 811.2、2 693.7和425.6 t/a,主要污染源为种植业源和农村生活源。自西向东,6条一级支流各污染物单位面积的入河排放量(排放强度)呈现逐渐增加的趋势。最后,针对水环境问题成因,有针对性地提出了治理对策。

Investigation and Countermeasures of Water Pollution Sources of Yangzte River Basin in Chizhou City

This study divided 6 control watersheds of important anabranchs for Yangtze river basin in Chizhou City based on digital elevation model (DEM) data and surface drainage.As the base line to 2015, the pollutant discharge amount from multiple sources into the river in each control watershed was investigated.The results showed that total amount of chemical oxygen demand(CODCr), ammonia nitrogen(NH3-N) and total phosphorus(TP) discharged into the river were reach to 18811.2, 2693.7 and 425.6 t/a, respectively.The primary pollution sources were agricultural source and rural life source.The quantity for pollutant on per unit area from 6 different control watersheds into the Yangtze river has a gradually increasing trend from the west to the east.At last, the causes of water environment problem were diagnosed and the fathering countermeasure were suggested pertinently.