Remote sensing monitoring of glacier changes in the Danghe River Basin during 1966-2019
In response to the significant impact of glacier changes in the Danghe River Basin on downstream water resources and the lack of existing research,this paper uses two glacier cataloging data,combined with multi-source satellite remote sensing images,and employs artificial vectorization methods to monitor glacier changes in the Danghe River Basin from 1966 to 2019.Taking the Zhazigou No.29 glacier as an example,the detailed change process is studied.The glaciers in the Danghe River Basin are mainly distributed in the Qilian Mountains,with a small proportion in the Altun Mountains.During the research period,the Danghe River Basin showed an overall trend of retreat,but the Zhazigou No.29 Glacier experienced two glacier advances.There are a total of 341 glaciers distributed in the Danghe River Basin,with a total area of 221.69 km2.From 1966 to 2019,glaciers showed a trend of retreat,with an increase of 5 glaciers and a decrease of 38.05 km2total glacier area,a relative annual decrease of 0.28％.The advance and retreat of the end of Zhazigou No.29 Glacier are different from the trend of accelerated shrinkage of the glaciers in the Qilian Mountains.The reasons for this are worthy of further study.
Qilian mountainsDanghe River BasinZhazigou No.29 glacierremote sensingglacier change
NETL
NSTL
万方数据
