摘要
沙漠湖泊动态变化研究对于揭示区域水循环和了解沙漠生态环境具有重要意义。本文利用1986—2020年覆盖库布齐沙漠区域10期Landsat TM/OLI遥感影像提取沙漠湖泊,统计各时期沙漠湖泊数量和面积变化信息,分析库布齐沙漠湖泊数量和面积动态变化的空间特征。结果表明:库布齐沙漠湖泊数量与面积整体表现为减小趋势,现存湖泊22个,面积7.4678 km^(2);库布齐沙漠湖泊在1986—2020年共干涸26个,现存湖泊中众多小型湖泊呈现增长趋势,但面积较小,对整个库布齐沙漠湖泊的影响较小,>1 km^(2)湖泊中的大青龙湖、天鹅湖以及大道图湖表现为萎缩状态,减少幅度较大,对整个库布齐沙漠湖泊影响较大;降水量、蒸发量和气温不是影响库布齐沙漠湖泊面积变化的主要因素,湖泊面积的空间特征可能由补给来源、补给方式及人为干扰造成。
The study on the dynamic changes of desert lakes is of great significance for revealing the regional water cycle and understanding the desert ecological environment.In this paper,10 Landsat TM/OLI remote sensing images covering the Kubuqi Desert from 1986 to 2020 were used to extract desert lakes.The number and area changes of desert lakes in each period were counted,and the spatial characteristics of the number and area changes of desert lakes in the Kubuqi Desert were analyzed.The results showed that the number and area of lakes in Kubuqi Desert showed a decreasing trend,with 22 existing lakes and an area of 7.4678 km^(2).From 1986 to 2020,a total of 26 lakes in the Kubuqi Desert were dried up.Many small lakes in the existing lakes showed an increasing trend,but the area was small,which had little impact on the entire Kubuqi Desert lake.Daqinglong Lake,Swan Lake and Dadaotu Lake in>1 km^(2) lakes all show a shrinking state,with a large reduction,which had a greater impact on the entire Kubuqi Desert lake.The relationship between lake area and precipitation,temperature and evaporation is not significant.The spatial characteristics of lake area changes may be caused by different sources of recharge in different lake areas,differences in lake recharge methods,and human factors.
作者
燕宇
左合君
闫敏
席成
董佳奇
牛丽梅
Yan Yu;Zuo Hejun;Yan Min;Xi Cheng;Dong Jiaqi;Niu Limei(College of Desert Management,Inner Mongolia Agricultural University,Hohhot 010018,China;Key Laboratory of Wind-sand Physics and Desertification Control Project in Inner Mongolia Autonomous Region,Inner Mongolia Agricultural University,Hohhot 010018,China;National Positioning Observation and Research Station of Hangjin Desert Ecosystem in Inner Mongolia,Inner Mongolia Agricultural University,Hohhot 010018,China;Hangjinqi Nature Reserve and Natural Forest Protection Workstation,Hangjinqi 017400,Inner Mongolia,China)
出处
《中国沙漠》
CSCD
北大核心
2024年第2期151-161,共11页
Journal of Desert Research
基金
“科技兴蒙”行动重点专项(KJXM-EEDS-202006)。
关键词
库布齐沙漠
湖泊
遥感分析
数量动态变化
面积动态变化
Kubuqi Desert
lake
remote sensing analysis
dynamic change in quantity
dynamic change of area
