Mapping of moraine dammed glacial lakes and assessment of their areal changes in the central and eastern Himalayas using satellite data

doi:10.1007/s11629-018-5023-1

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol 16 No.1

	Mapping of moraine dammed glacial lakes and assessment of their areal changes in the central and eastern Himalayas using satellite data
	Begam, Sazeda; Sen, Dhrubajyoti
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:1 页码:77-94
关键词	Glacier retreat Lakes mapping Moraine dammed glacial lake (MDGL) Surface area change of lakes Landsat imagery data Least criteria decision analysis (LCDA)
ISSN号	1672-6316
DOI	10.1007/s11629-018-5023-1
文献子类	Article
英文摘要	The relatively rapid recession of glaciers in the Himalayas and formation of moraine dammed glacial lakes (MDGLs) in the recent past have increased the risk of glacier lake outburst floods (GLOF) in the countries of Nepal and Bhutan and in the mountainous territory of Sikkim in India. As a product of climate change and global warming, such a risk has not only raised the level of threats to the habitation and infrastructure of the region, but has also contributed to the worsening of the balance of the unique ecosystem that exists in this domain that sustains several of the highest mountain peaks of the world. This study attempts to present an up to date mapping of the MDGLs in the central and eastern Himalayan regions using remote sensing data, with an objective to analyse their surface area variations with time from 1990 through 2015, disaggregated over six episodes. The study also includes the evaluation for susceptibility of MDGLs to GLOF with the least criteria decision analysis (LCDA). Forty two major MDGLs, each having a lake surface area greater than 0.2 km2, that were identified in the Himalayan ranges of Nepal, Bhutan, and Sikkim, have been categorized according to their surface area expansion rates in space and time. The lakes have been identified as located within the elevation range of 3800 m and 6800 m above mean sea level (a msl). With a total surface area of 37.9 km2, these MDGLs as a whole were observed to have expanded by an astonishing 43.6% in area over the 25 year period of this study. A factor is introduced to numerically sort the lakes in terms of their relative yearly expansion rates, based on their interpretation of their surface area extents from satellite imageries. Verification of predicted GLOF events in the past using this factor with the limited field data as reported in literature indicates that the present analysis may be considered a sufficiently reliable and rapid technique for assessing the potential bursting susceptibility of the MDGLs. The analysis also indicates that, as of now, there are eight MDGLs in the region which appear to be in highly vulnerable states and have high chances in causing potential GLOF events anytime in the recent future.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000456251500007
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46410]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol 16 No.1
推荐引用方式 GB/T 7714	Begam, Sazeda,Sen, Dhrubajyoti. Mapping of moraine dammed glacial lakes and assessment of their areal changes in the central and eastern Himalayas using satellite data[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(1):77-94.
APA	Begam, Sazeda,&Sen, Dhrubajyoti.(2019).Mapping of moraine dammed glacial lakes and assessment of their areal changes in the central and eastern Himalayas using satellite data.JOURNAL OF MOUNTAIN SCIENCE,16(1),77-94.
MLA	Begam, Sazeda,et al."Mapping of moraine dammed glacial lakes and assessment of their areal changes in the central and eastern Himalayas using satellite data".JOURNAL OF MOUNTAIN SCIENCE 16.1(2019):77-94.