中国地质调查2025，Vol.12Issue(3)：57-65,9.DOI:10.19388/j.zgdzdc.2024.108
三江源区冻融荒漠化遥感分析
Remote sensing analysis of freeze-thaw desertification in Sanjiangyuan region
摘要
Abstract
The rapid development of freeze-thaw desertification poses a serious challenge to the ecological securi-ty of Qinghai-Tibet Plateau.In order to improve the research level of freeze-thaw desertification and promote scientific prevention and control of freeze-thaw desertification,the authors took freeze-thaw desertification of Sanjiangyuan region as the study object to construct a remote sensing investigation method for freeze-thaw deserti-fication based on geological features.The freeze-thaw desertification in Sanjiangyuan region was studied by this method to analyze its spatial distribution characteristics,the causes and the development trends of freeze-thaw desertification.The results show that the types of permafrost landforms formed in different geographical locations in permafrost distribution areas were the basis for interpreting freeze-thaw desertification and the freeze-thaw de-sertification was divided into three levels,that is severe,moderate and mild,combined with comprehensive indi-cators of proportion of exposed surface and fragmented areas,vegetation coverage,and surface landscape charac-teristics.The remote sensing interpretation indicators for different degrees of freeze-thaw desertification were con-structed,and the interpretation accuracy of freeze-thaw desertification in Sanjiangyuan region was over 80％.The study area was dominated by severe freeze-that desertification,and Yangtze River source region has the lar-gest distribution area of freeze-thaw desertification in Sanjiangyuan region.Permafrost was the material condition for the occurrence of freeze-thaw desertification,and the sustained warming of regional climate was the internal cause of the exacerbation of freeze-thaw desertification.And overgrazing and overloading were the main human activity influencing factors that cause the rapid development of freeze-thaw desertification.Due to the warming and humidifying trend of Qinghai-Tibet Plateau climate,the continuous degradation of permafrost will further ex-acerbate freeze-thaw desertification.The relevant research results indicated that remote sensing survey methods could achieve rapid acquisition of information on freeze-thaw desertification,which has certain reference signifi-cance.关键词
三江源区/冻融荒漠化/遥感/分布特征/成因/发展趋势Key words
Sanjiangyuan region/freeze-thaw desertification/remote sensing/distribution characteristics/cau-ses/development trends分类
天文与地球科学引用本文复制引用
朱刚,高会军..三江源区冻融荒漠化遥感分析[J].中国地质调查,2025,12(3):57-65,9.基金项目
中国地质调查局"全国地球关键带遥感地质调查项目(编号:DD20190536)"资助. （编号:DD20190536）
