气候变化领域集成服务门户(CCPortal): Integrated hazard assessment of Cirenmaco glacial lake in Zhangzangbo valley, Central Himalayas

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DOI	10.1016/j.geomorph.2015.08.013
	Integrated hazard assessment of Cirenmaco glacial lake in Zhangzangbo valley, Central Himalayas
	Wang, Weicai; Gao, Yang; Anacona, Pablo Iribarren; Lei, Yanbin; Xiang, Yang; Zhang, Guoqing; Li, Shenghai; Lu, Anxin
通讯作者	Wang, WC ; Gao, Y (通讯作者)
发表日期	2018
ISSN	0169-555X
EISSN	1872-695X
起始页码	292
结束页码	305
卷号	306
英文摘要	Glacial lake outburst floods (GLOFs) have recently become one of the primary natural hazards in the Himalayas. There is therefore an urgent need to assess GLOF hazards in the region. Cirenmaco, a moraine-dammed lake located in the upstream portion of Zhangzangbo valley, Central Himalayas, has received public attention after its damaging 1981 outburst flood. Here, by combining remote sensing methods, bathymetric survey and 2D hydraulic modeling, we assessed the hazard posed by Cirenmaco in its current status. Inter-annual variation of Cirenmaco lake area indicates a rapid lake expansion from 0.10 +/- 0.08 km(2) in 1988 to 039 +/- 0.04 km(2) in 2013. Bathymetric survey shows the maximum water depth of the lake in 2012 was 115 +/- 2 m and the lake volume was calculated to be 1.8 x 10(7) m(3). Field geomorphic analysis shows that Cirenmaco glacial lake is prone to GLOFs as mass movements and ice and snow avalanches can impact the lake and the melting of the dead ice in the moraine can lower the dam level. HEC-RAS 2D model was then used to simulate moraine dam failure of the Cirenmaco and assess GLOF impacts downstream. Reconstruction of Cirenmaco 1981 GLOF shows that HEC-RAS can produce reasonable flood extent and water depth, thus demonstrate its ability to effectively model complex GLOFs. GLOF modeling results presented can be used as a basis for the implementation of disaster prevention and mitigation measures. As a case study, this work shows how we can integrate different methods to GLOF hazard assessment (C) 2015 Elsevier B.V. All rights reserved.
关键词	MORAINE-DAMMED LAKES MOUNT EVEREST REGION DEBRIS-COVERED GLACIERS KOSHI RIVER-BASIN OUTBURST FLOODS CATASTROPHIC DRAINAGE CORDILLERA BLANCA RISK-ASSESSMENT IMJA TSHO RECONSTRUCTION
英文关键词	GLOF; Hazard assessment; HEC-RAS modeling; Bathymetric survey
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000427344100023
来源期刊	GEOMORPHOLOGY
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/259163
推荐引用方式 GB/T 7714	Wang, Weicai,Gao, Yang,Anacona, Pablo Iribarren,et al. Integrated hazard assessment of Cirenmaco glacial lake in Zhangzangbo valley, Central Himalayas[J]. 中国科学院青藏高原研究所,2018,306.
APA	Wang, Weicai.,Gao, Yang.,Anacona, Pablo Iribarren.,Lei, Yanbin.,Xiang, Yang.,...&Lu, Anxin.(2018).Integrated hazard assessment of Cirenmaco glacial lake in Zhangzangbo valley, Central Himalayas.GEOMORPHOLOGY,306.
MLA	Wang, Weicai,et al."Integrated hazard assessment of Cirenmaco glacial lake in Zhangzangbo valley, Central Himalayas".GEOMORPHOLOGY 306(2018).