Analysis of periodic evolution law of water quality and its driving factors for small and medium-sized rivers in southern Guangxi based on WLI
To explore the periodic characteristics and driving factors of water quality evolution process in small and medium-sized rivers that flowing into the Beibu Gulf,taking the Qinjiang River as an example,based on the moni-toring data from 1991 to 2019 and previous related research work,the water quality evolution process of the typical Qinjiang River section was analyzed by WLI evaluation method,and the driving factors affecting the evolution of wa-ter quality in Qinjiang River were also analyzed.The results of analysis demonstrate the evolution process of water quality in Qinjiang River can be roughly divided into four stages.The first stage is the serious pollution stage in the early 1990s.The second stage is the water quality improvement stage in the middle and late 1990s.The third stage is the stage with water quality deterioration again in the first decade of the 21st century.The fourth stage is the stage with the water quality improved again and stabilized since 2011.The economic and social development process along the Qinjiang River are closely related to the water quality evolution process of the river.The most stringent re-source and environment control policy plays a key role in restoring the water quality of Qinjiang River.
water qualitywater quality level index(WLI)evolution lawQinjiang River
万方数据
维普
