Evaluation of Lake Water Environment Quality and Its Change Trend Analysis

In order to fully grasp the Lake water quality and pollution status,the paper evaluated water environment quality of water quality pollution characteristics,water quality status and lake eutrophication status. The paper analyzed variation trend of the Lake using the rank correlation coefficient method. The results showed,total phosphorus was main pollution factor of effecting Lake water environment quality,water quality was good in dry water period,water quality was light pollution in flow and wet water period,and nutritional status was middle nutrition. Trend analysis of permanganate index of 3 section of Lake showed,section 1 decreased in dry water period and no significant changes( wave) in flow and wet water period,section 2 and section 3 no significant changes( wave) in dry,flow and wet water period.