徐州市某河流水质变化与水期相关性分析

Correlation Analysis Between Water Quality and Water Period in of A River Xuzhou City

大量河流水质监测数据表明河流断面水质与水期具有一定的相关性,为研究不同水期各主要水质污染因子质量浓度的变化情况,采用河流监测断面水质变化卡方检验法对徐州市某河流断面进行研究,进一步解析水质与水期之间的影响关系。结果表明:与平、枯水期相比,丰水期期间,河流水质恶化显著。河流断面水质指标中氨氮(NH_(3)-N)、总磷(TP)、高锰酸盐指数(COD_(Mn))质量浓度随降雨量增加而升高,呈一定的正相关性;溶解氧(DO)则与降水呈负相关关系;pH值基本无变化。分析农业面源污染是导致该河流断面水质变差的主要原因,建议加强区域农业面源污染管控以提升水环境质量。

A large number of monitoring datas on river water quality showed that there was a certain correlation between water quality and water period,in order to study the change of the concentration of the main pollution factors in different water periods,the chi-square test method on water quality changes in river monitoring section was used on river sections in Xuzhou City, and the influence on relationship between water quality and water period was analyzed further.The results show that compared with the dry and horizontal water periods, the river water quality deteriorated significantly during the high water period.The mass concentrations of ammonia nitrogen(NH_(3)-N), total phosphorus(TP) and permanganate index(COD_(Mn))in the water quality indexes of river sections increased with rainfall, showing a certain positive correlation;a negative correlation on dissolved oxygen(DO) with water;no correlation on pH.Agricultural non-point source pollution was the main reason for the deterioration of water quality in the river section,it was suggested that the control on agricultural non-point source pollution should be strengthened to improve the quality of water.