1973-2010年巴丹吉林沙漠腹地湖泊面积空间变化的遥感分析

摘要

Using remote sensing images in the Badain Jaran Desert in 1973,1990,2000,2010,we got lake area change information and statistics on the desert lakes in different phases,then analyzed the spatial characteristics of lake area changes.Results indicated that there were some new lakes and area increase in some lakes,although the number and the area of lakes were reduced in each period.There are 19 lakes dry-up,7 lakes new,43 lakes shrunk,6 lakes expanded and 26 lakes stabled during 1973-2010.Spatially,the lakes with reduced area were distributed throughout the study area,while the lakes with increased area were mostly located in the east of the study area and in periphery of the middle-eastern region.The lakes with small changes in area were gathered.The lake area changes did not show a significant positive correlation in the entire space.The spatial characteristics of the lake area changes are probably due to different source supplies in different regions or the way of supply varies among the lakes.%利用1973、1990、2000、2010年4个时期遥感影像数据,提取并统计了1973-1990、1990-2000、2000-2010、1973-2010年4个时期湖泊面积变化信息,分析了巴丹吉林沙漠湖泊面积变化的空间特征.结果表明,湖泊数量与面积整体表现为减小,同时也存在湖泊面积增大与湖泊新增;1973-2010年间,沙漠腹地共干涸19个湖泊、新增7个湖泊,43个湖泊萎缩、6个湖泊扩张,26个湖泊面积基本保持稳定;从湖泊面积的空间变化看,面积减小的湖泊在整个湖泊区域均有分布,面积增大的湖泊较多分布于研究区东侧,且多在中东部区域外围,面积减小剧烈的湖泊在空间上有聚集分布的态势;湖泊面积变化量在整个空间上并没有表现出显著的正相关关系.湖泊面积变化所表现的空间特征可能由于不同湖泊区域补给来源不同或不同湖泊补给方式存在差异造成的.