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Glacial Lakes in the Nepal Himalaya: Inventory and Decadal Dynamics (1977-2017)
Khadka, N (Khadka, Nitesh)1,2; Zhang, GQ (Zhang, Guoqing)1,3; Thakuri, S (Thakuri, Sudeep)4
Source PublicationREMOTE SENSING
2018
Volume10Issue:12Pages:1913
DOI10.3390/rs10121913
Abstract

Himalayan glaciers, in general, are shrinking and glacial lakes are evolving and growing rapidly in number and size as a result of climate change. This study presents the latest remote sensing-based inventory (2017) of glacial lakes (size >= 0.0036 km(2)) across the Nepal Himalaya using optical satellite data. Furthermore, this study traces the decadal glacial lake dynamics from 1977 to 2017 in the Nepal Himalaya. The decadal mapping of glacial lakes (both glacial-fed and nonglacial-fed) across the Nepal Himalaya reveals an increase in the number and area of lakes from 1977 to 2017, with 606 (55.53 +/- 16.52 km(2)), 1137 (64.56 +/- 11.64 km(2)), 1228 (68.87 +/- 12.18 km(2)), 1489 (74.2 +/- 14.22 km(2)), and 1541 (80.95 +/- 15.25 km(2)) glacial lakes being mapped in 1977, 1987, 1997, 2007, and 2017, respectively. Glacial lakes show heterogeneous rates of expansion in different river basins and elevation zones of Nepal, with apparent decadal emergences and disappearances. Overall, the glacial lakes exhibited similar to 25% expansion of surface areas from 1987 to 2017. For the period from 1987 to 2017, proglacial lakes with ice contact, among others, exhibited the highest incremental changes in terms of number (181%) and surface area (82%). The continuous amplified mass loss of glaciers, as reported in Central Himalaya, is expected to accompany glacial lake expansion in the future, increasing the risk of glacial lake outburst floods (GLOFs). We emphasize that the rapidly increasing glacial lakes in the Nepal Himalaya can pose potential GLOF threats to downstream population and infrastructure.

Subject AreaRemote Sensing
WOS IDWOS:000455637600055
Language英语
Indexed BySCIE
KeywordMount Everest Region Difference Water Index Outburst Flood Risk Tibetan Plateau Supraglacial Ponds Rapid Expansion Climate-change Koshi Basin River-basin Precipitation
WOS SubjectRemote Sensing
Cooperation Status国内
ISSN2072-4292
Department环境变化与地表过程重点实验室
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8480
Collection图书馆
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
4.Tribhuvan Univ, Cent Dept Environm Sci, Kirtipur 44618, Nepal.
Recommended Citation
GB/T 7714
Khadka, N ,Zhang, GQ ,Thakuri, S . Glacial Lakes in the Nepal Himalaya: Inventory and Decadal Dynamics (1977-2017)[J]. REMOTE SENSING,2018,10(12):1913.
APA Khadka, N ,Zhang, GQ ,&Thakuri, S .(2018).Glacial Lakes in the Nepal Himalaya: Inventory and Decadal Dynamics (1977-2017).REMOTE SENSING,10(12),1913.
MLA Khadka, N ,et al."Glacial Lakes in the Nepal Himalaya: Inventory and Decadal Dynamics (1977-2017)".REMOTE SENSING 10.12(2018):1913.
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