【摘要】 采用W分级法,2006年4-5月对常熟地区典型水域水质(包括水质透明度、溶解氧含量、电导率、高锰酸盐指数、总氮含量、总磷含量等主要指标)进行了监测评价。结果表明:监测期城区与郊区的水质已受到一定程度的污染,其污染程度已经超出了水体的自净能力和点源化学及物理方式处理污水的能力(其中总氮平均超标4.45倍,溶解氧含量也低于Ⅲ类合格水域标准的1.44倍)。本文根据监测结果,指出需要建设一个能大量处理水质污染物的面源水质生物净化体系,以避免或减缓其水质污染的加重。更多还原

【Abstract】 By W manners,the main index of water quality,including SD,DO,EC,COD TN,TP,were monitored and appraised in Changshu region during April to May 2006.The results showed that the water quality in both city and suburbs were suffered serious pollution which has overrun the self-purification capacity of water bodies and the capacity of dealing with point source pollution sewage by chemical and physical technology.The degree of contamination belongs to heavy pollution level.In this paper,it is suggested for Changshu region to build a biology purification system of non-point source pollution(NPSP) sewage that can deal with water pollutant immensely so as to avoid or alleviate the aggravation of the water contamination.更多还原