新疆艾比湖流域耕地面积变化对艾比湖湖面面积的影响分析

Influences of changes in cultivated land area on surface area of Ebinur Lake vally in Xinjiang

基于1950～2009年艾比湖流域耕地面积与湖面面积历史数据和卫星影像数据,研究艾比湖流域耕地面积变化对艾比湖湖面面积的影响。结果表明,艾比湖每年3～4月湖面面积最大,而4月以后特别是7月后,湖面面积减小;2000～2009年艾比湖湖面面积最大的是在2003～2004年,湖面面积最小的是在2008～2009年,且湖面面积呈逐年减小的趋势;艾比湖流域的耕地面积不断增加,且增速逐年增长,以2005～2009年的增加速度最高;相关性分析显示,艾比湖流域耕地面积与湖面面积之间呈线性负相关,且显著相关,表明流域耕地面积的增加会直接导致湖面面积的减少。

The present paper aims to study the influences of changes in cultivated land area on the lake surface area of Ebinur Lake valley in Xinjiang.The studies were based on archived data and satellites image data taken during 1950-2009.The lake surface area was found largest during March to April every year,while it reduced after April.From 2000-2009,the lake surface area decreased year after year with the largest lake surface area appeared during 2003-2004 and the smallest lake surface area appeared during 2008-2009.However,the cultivated land area of Ebinur Lake valley was increased year after year with increasing growth rate.During 2005-2009,the increase in growth rate of cultivated land area reached the highest.The correlation analysis indicated that there was a significant linear negative correlation between cultivated land area and lake surface area.Therefore,the increase in cultivated land area resulted in decreased lake surface area.