淮河中游水质时空变异研究

依据淮河中游1998~2007年的水质监测数据,研究淮河中游水质近10 a的时空变异,并采用有机污染综合指数对水质污染状况及趋势进行评价分析,结果表明:淮河中游水质呈逐渐改善的趋势,说明全流域水污染治理已经取得了一定成效,但是,年内水质季节性差异较大,枯水期水质污染依然严重,多数处于中等污染或是严重污染状态;水体最主要的污染物为氨氮;淮河中游的上段水质要好于下段,淮南大涧沟段和吴家渡段为淮河中游的重点污染区域和主要污染物输入区域。

Study on spatial and temporal variation of water quality in middle reaches of Huaihe River

Based on monitoring data from 1998 to 2007, the spatial and temporal variation of water quality in the middle reaches of the Huaihe River over the past ten years were investigated and the water pollution status and trend were assessed using an integrated index of organic pollution. The water quality of the Huaihe River showed a tendency of gradual improvement, and this indicates that significant effects of water pollution control have been obtained throughout the whole watershed. However, significant variations of water quality existed in different seasons, and the water was still seriously polluted in the low flow period. The dominant pollutant was ammonium. The water quality in the upper part of the middle reach of the Huaihe River was much better than that in the lower part. The Huainan Dajiangou section and the Wujiadu section were the most seriously polluted areas in the middle reach of the Huaihe River.