不同排水模式对于农村水环境质量的影响

THE IMPACT OF DIFFERENT DRAINAGE MODES ON WATER QUALITY OF RURAL WATER ENVIRONMENT

针对农村生活污水处理现状,以上海市某区为切入点研究了东部河网地区农村排水模式对受纳水环境的影响。通过对代表性区域受纳水系布点、采样并检测主要水质参数,对比分析直排和分散处理这两类典型排水模式受纳水体水质状况,从污染负荷角度定量评估不同排水模式对农村水环境的影响,为农村面源污染控制提供数据支撑。研究表明,生活污水分散处理区域有机污染总量较直排区域降低25%以上,总氮和总磷浓度较直排模式分别降低了50%和40%,显示了农村分散式生活污水处理的必要性。

Basing on the current situation of rural domestic sewage disposal,the impact of drainage mode on rural water environment located on the east river network area of China was studied by investigating a specific district in Shanghai. To evaluate the impact of various drainage modes on rural water environment quantitatively in terms of pollution load,receiving water qualities under two typical drainage modes,direct drainage and dispersing treatment were compared based on the analysis of samples collected from the representative area,which reflected the influence of drainage modes on the rural receiving water and provide primary information for the rural non-point source pollution control. The study showed that the total amount of organic pollution in sewage dispersing treatment area was 25% lower than that in direct drainage treatment area,and the total nitrogen and total phosphorus in dispersing treatment area was 50% and 40% lower respectively,compared with the other situation,which showed the necessity of sewage dispersing treatment in rural areas.