抚仙湖和星云湖水质变化趋势分析

The Analysis of Water Quality Change Trend for Lake Fuxian & Lake Xingyun

摘要: 国内有关抚仙湖及星云湖的水环境指标的成文调查研究始于1963年。但2008年抚仙湖—星云湖倒流之后的研究几乎空白，对两湖联动机制研究也较少。本文结合1957~2009年的气象数据和两湖水质参数，分析湖泊对全球气候变化的响应，同时探究两者联动影响机制及其空间差异。发现近半个世纪以来，温度有明显的波动上升，降水量有轻微的波动下降趋势，相比夏季，冬季对全球气候的变化有更敏感的响应，云南高原湖泊的抚仙湖和星云湖正向着不利于湖泊良性循环的方向发展；抚仙湖和星云湖均存在时空异质性，受人类活动比较小的地区，水质较好，星云湖东岸水质好于西岸水质；在各项指标中，星云湖几乎均高于抚仙湖，其中，星云湖的电导率(Spcond)约是抚仙湖的2倍，星云湖的藻蓝蛋白约是抚仙湖的21倍，但抚仙湖和星云湖的PH值均偏高。

Abstract: The domestic written research on water environment of Lake Fuxian & Lake Xingyun has begun since 1963. But after 2008, the research on Lake Fuxian & Lake Xingyun is almost blank, and the research on the linkage mechanism between the two lakes is also insufficient. Based on the me-teorological data from 1957 to 2009 and on the water quality parameters, this paper analyses the situation of lakes in response to global climate change, at the same time explores the mechanism of influence and its spatial difference. It is found that in nearly half a century, the temperature fluctuations increase markedly, and the precipitation fluctuation decline slightly. Compared with summer, the two lakes have more sensitive response to global climate change in winter. Lake Fuxian & Lake Xingyun of Yunnan plateau are developing in the direction unfavorable to a virtuous cycle; Lake Fuxian & Lake Xingyun both have spatio-temporal heterogeneity and areas less affected by human activity. The water quality is relatively good, and the water quality on the east side of Lake Xingyun is better than that in the west; almost all the indicators of Lake Xingyun are higher than those of Lake Fuxian. The conductivity (Spcond) of Lake Xingyun is about twice of Lake Fuxian. The Cynobacteria of Lake Xingyun is about 21 times of Lake Fuxian. However, the PH values of Lake Fuxian & Lake Xingyun are both on the high side.