倒水河红安段污染物时空变化特征及水质评价

Spatiotemporal Variation Characteristics of Pollutants and the Water Quality Assessment in Daoshui River in Hong’an County

为了解倒水河红安段水质污染情况,以倒水河红安段为研究对象,通过水质监测,结合综合污染指数评价法,分析倒水河红安段水质时空变化特征及水质污染情况。主要的研究结果如下:倒水河红安段流域水体中COD、NH 3-N、TP的浓度分别为5.92~24.56、0.06~3.52、0.00~0.99 mg/L,枯水期超标现象最严重,多出现在中下游的城关镇、高桥镇和八里湾镇。对倒水河红安段干流上的13个监测断面进行水质评价,发现倒水河红安段在枯、丰、平3个水期均存在不同程度的超标情况,其中以枯水期水质最差,丰水期和平水期较好。

In order to understand the water quality pollution situation of Daoshui River in Hong’an County,this paper took Daoshui River in Hong’an County as the research object,through water quality monitoring,combined with the comprehensive pollution index evaluation method,analyzed the temporal and spatial change characteristics of water quality and the status of water quality pollution in Daoshui River in Hong’an County.The main research results were as follows:the concentration range of COD,NH 3-N and TP in Daoshui River’s basin in Hong’an County was 5.92-24.56,0.06-3.52 and 0.00-0.99 mg/L,respectively.The phenomenon of exceeding the standard was the most serious in the low water period,and most of it occurred in Chengguan Town,Gaoqiao Town and Baliwan Town in the middle and lower reaches.The water quality of 13 monitoring sections on the main stream of Daoshui River in Hong’an County was evaluated.It was found that the water quality of Daoshui River in Hong’an County exceeded the standard in different degrees in dry,wet and normal periods,among which the water quality was the worst in dry period,and better in wet and normal periods.