Monitoring Glacier Changes of Recent 50 Years in the Upper Reaches of Heihe River Basin Based on Remotely-Sensed Data

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Qiang, Bie^1 ; Lei, He^1 ; Zhao, Chuan-Yan^2

College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China^1

State Key Laboratory of Pastoral Agricultural Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China^2

关键词: Expert knowledge;    Heihe river basin;    Image interpretation;    Landsat TM images;    Object oriented;    Remotely sensed data;    Spatial temporals;    Temperature rising;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012138/pdf
DOI  :  10.1088/1755-1315/17/1/012138

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The upper reach of the Heihe River Basin was selected as the study area. The distribution data of glaciers in the study area has been automatically derived from topographic maps made in 1960 and from Landsat TM images in 1990, 2000 and 2010 by object-oriented image interpretation method combined with expert knowledge rules. Spatial-temporal variations of glaciers were analyzed with GIS technology. Results show that glaciers have shrunk significantly by 138.90 km2during the period from 1960 to 2010. Compared with the data of 1960, 35.6% of glaciers have been retreating and the calculated average rate of glaciers retreating is 2.78 km2every year since 1960. The glacial retreating has been most significant if the glaciers have lower-elevation ablation areas and low-elevation accumulation areas. The temperature rising is the key factor of glacier retreating.