气候变化领域集成服务门户(CCPortal): An integrative method for identifying potentially dangerous glacial lakes in the Himalayas

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DOI	10.1016/j.scitotenv.2021.150442
	An integrative method for identifying potentially dangerous glacial lakes in the Himalayas
	Zhang, Taigang; Wang, Weicai; Gao, Tanguang; An, Baosheng; Yao, Tandong
通讯作者	Wang, WC ; An, BS (通讯作者)
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	806
英文摘要	Glacial lakes in the Himalayas are widely distributed. Since 1900, more than 100 glacial lake outburst floods (GLOFs) have originated in the region, causing approximately 7000 deaths and considerable economic losses. Identifying potentially dangerous glacial lakes (PDGLs) is considered the first step in assessing GLOF risks. In this study, a more thorough inventory of PDGLs was presented that included numerous small-sized glacial lakes (<0.1 km(2)) that were generally neglected in the Himalayas for decades. Moreover, the PDGL evaluation system was improved in response to several deficiencies, such as the selection of assessment factors, which are sometimes arbitrary without a solid scientific basis. We designed an optimality experiment to select the best combination of assessment factors from 57 factors to identify PDGLs. Based on the experiments on both drained and non-drained glacial lakes in the Sunkoshi Basin, eastern Himalayas, five assessment factors were determined to be the best combination: the mean slope of the parent glacier, the potential for mass movement into the lake, the mean slope of moraine dams, the watershed area, and the lake perimeter, corresponding to the GLOF triggers for ice avalanches, rockfalls and landslides, dam instability, heavy precipitation or other liquid inflows, and lake characteristics, respectively. We then applied the best combination of assessment factors to the 1650 glacial lakes with an area greater than 0.02 km(2) in the Himalayas. We identified 207 glacial lakes as very high-hazard and 345 as high-hazard. It is noteworthy that in various GLOF susceptibility evaluation scenarios with different assessment factors, weighting schemes, and classification approaches, similar results for glacial lakes with high outburst potential have been obtained. The results provided here can be used as benchmark data to assess the GLOF risks for local communities. (C) 2021 The Authors. Published by Elsevier B.V.
关键词	MORAINE-DAMMED LAKES OUTBURST FLOOD RISK REGIONAL-SCALE ANALYSIS HIGH-MOUNTAIN ASIA POIQU RIVER-BASIN CORDILLERA BLANCA CATASTROPHIC DRAINAGE HAZARD ASSESSMENT INVENTORY SUSCEPTIBILITY
英文关键词	Glacial lake outburst flood (GLOF); Hazard; GLOF susceptibility; Weighting scheme; Himalayas
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000701843800008
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260611
推荐引用方式 GB/T 7714	Zhang, Taigang,Wang, Weicai,Gao, Tanguang,et al. An integrative method for identifying potentially dangerous glacial lakes in the Himalayas[J]. 中国科学院青藏高原研究所,2022,806.
APA	Zhang, Taigang,Wang, Weicai,Gao, Tanguang,An, Baosheng,&Yao, Tandong.(2022).An integrative method for identifying potentially dangerous glacial lakes in the Himalayas.SCIENCE OF THE TOTAL ENVIRONMENT,806.
MLA	Zhang, Taigang,et al."An integrative method for identifying potentially dangerous glacial lakes in the Himalayas".SCIENCE OF THE TOTAL ENVIRONMENT 806(2022).