滇池水位变化趋势及影响因素初步分析

Analysis on the variation trend and affecting factors of water level in Dianchi Lake

近年来,滇池富营养化加剧,水质下降,水量不足,已成为国家重点治理的"三河三湖"之一。湖泊水质变化与水位变化密切相关,本文采用Mann-Kendall非参数检验方法对滇池(海埂)站1970-2010年水位的变化趋势进行分析,并初步探讨了影响滇池水位变化的主要因素。结果表明:自1989年以来,滇池水位上升趋势明显,蒸发、淤积和人类活动是影响水位上升的主要因素,而降雨对水位变化影响相对较小。

In recent years,Dianchi Lake has become one of the national key treatment project,and one of the three most polluted rivers and three lakes for it's increasing eutrophication,declining in water quality and water shortage.The water quality closely related to the water level of the lake.In this article,the main factors,which affect the water level,were preliminary studied based on the analysis of the water level changing trends from 1970 to 2010 at Haigeng station by using Mann-Kendall,one of nonparametric test methods.The results showed that Dianchi lake water level has been rising significantly since 1989,which is caused mainly by evaporation,siltation and human activities,rather than rainfall.