Identification of Pollution Causes and Research on Pollution Control Measures in Leshan Section of Mangxi River Basin
In order to improve the water quality of the Mangxi River,a tributary of the Minjiang River,in this paper,the quality of water samples obtained at 8 monitoring sections of the trunk stream of the Mangxi River for 31 months was analyzed usingthe single-factor evaluation method.The pollution load of the Mangxi River was also estimated based on the pollution source data and correlation coefficient.Finally,some measures were proposed for improving the water environment of the Mangxi River.The results showed that the water quality of the trunk stream of the Mangxi River is mainly of Class Ⅳ,and in some periods it is of Class Ⅴ or even inferior Class Ⅴ.Sudden ammonia-nitrogen(NH3-N)pollution occurs mainly in the middle and upper reaches from February to July;total phosphorus(TP)pollution presents strong seasonal characteristics,which is prone to occur from May to September;permanganate index(CODMn)exceeded the standard value in most of the year except January,November and December.According to the analysis of pollution sources,the Mangxi River is mainly affected by agricultural and domestic pollutants.The TP pollution load is mainly from the following villages and towns,including Yancheng,Mata,Maoqiao and Zhugen;the COD pollution load is mainly from the following villages and towns,including Yancheng,Wangcun,Mata and Zhugen;and the annual pollution load of NH3-N is mainly from the following villages and towns,including Yancheng,Baima,Mata and Zhugen.
Mangxi Riverwater environmentpollution loadpollution control measures
万方数据
维普
