Glacier parameter extraction using Landsat 8 images in the eastern Karakorum

[摘要] Changes in glacial melt and river runoff directly impact upon water resources and utilization. Glacier area data provide the basis of analysing glacier change. In this study, Landsat images from the end of the 2014 melt season were analysed using remote sensing and geographic information systems (GIS) technology. We compared the band ratio method and Normalized Difference Snow Index (NDSI) method for extracting glacial parameters. The results show that the band ratio method is better for glacier boundary extraction. However, for debris covered glaciers, textural analysis is needed for area extraction and needed to revise boundary extraction results through the visual interpretation of the remote sensing image Accurate area extraction is particularly important for glaciers, as these are major contributors to runoff.

[发布机构] School of Land Science and Technology, China University of Geosciences(Beijing), Haidian District, Beijing; 100083, China^1;Beijing Jiao Tong University, School of Civil Engineering, Haidian District, Beijing; 100044, China^2;Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing; 100094, China^3;Shandong University of Science and Technology, College of Geomics, Qingdao; 266590, China^4

[效力级别] 政治学

[关键词] Boundary extraction;Debris covered glaciers;Glacier change;Landsat images;Normalized difference snow indices;Remote sensing images;Textural analysis;Visual interpretation