邕江南宁市区段水质时空变化规律分析

应用季节性肯达尔检验方法及概率法对邕江三个水质监测站的系列监测资料进行水质时空趋势分析,得出:①邕江水质为有机污染型并呈逐年下降趋势;②上游的南宁站水质优于下游的豹子头、蒲庙两站,为Ⅱ~Ⅲ类水;③豹子头、蒲庙由于受上游南宁市区5大排污口影响,水质较劣,分别为Ⅴ、Ⅳ类。对排污口形成的污染带水质状况进行分析,提出了邕江水资源保护措施。

Analysis of the space-time variation rule of the water quality in Nanning section of the Yongjiang River

Based on the monitoring data from three water quality inspection stations in the Yongjiang River,the space-time change tendency of the water quality was analyzed using seasonal Kendall examination method and probabilistic method.It is concluded that the water quality in the Yongjiang River,which is of organic pollution,declines annually.The water quality of Nanning station(upstream) is of Ⅱ and Ⅲ level of the water quality standard,which is better than those in Baozitou station and Pumiao station(downstream).The water quality of Baozitou station and Pumiao station is of Ⅴ and Ⅳ level respectively because of serious pollution caused by wastewater discharged from five effluents in NanNing city.The water quality of pollution area caused by the sewage discharged was analyzed,and water resources protection measures for the Yongjiang River were proposed.