气候变化领域集成服务门户(CCPortal): The formation and impact of landslide dams

CCPortal

DOI	10.1016/j.earscirev.2020.103116
	The formation and impact of landslide dams – State of the art
	Fan X.; Dufresne A.; Siva Subramanian S.; Strom A.; Hermanns R.; Tacconi Stefanelli C.; Hewitt K.; Yunus A.P.; Dunning S.; Capra L.; Geertsema M.; Miller B.; Casagli N.; Jansen J.D.; Xu Q.
发表日期	2020
ISSN	00128252
卷号	203
英文摘要	The blocking of river courses by mass movements is very common in mountainous areas with deep and narrow valleys. Landslide dams may pose serious threats to people and their livelihoods downstream in the case of abrupt dam failure. Since the publication of benchmark reviews of Costa and Schuster (1988) and Korup (2002), there is a growing number of studies focusing on the formation, stability, and short-term impacts of landslide dams. This review combines the insights of all these studies, builds on current concepts of landslide dams, and suggests ways to unify terminologies and classifications. We furthermore present a new worldwide database compiled from literature data. It contains 410 landslide dams >1 million m3 in volume that were formed since 1900 since these have the most complete data entries. These data show that dam longevity is, among other factors, correlated with the type of landslide forming the dam. Those formed by rock/debris avalanches and rockslides have longest lifespans. However, the influence of landslide type or material on dam longevity decreases with time after dam formation. To ensure consistency in the next database generation, we suggest guidelines for data collection to provide a solid basis for evaluating dam stability and governing factors. A preliminary classification matrix for landslide dam stability that combines topographic setting and the internal structure of the dam body is another outcome of our review. Furthermore, an evaluation of the various geomorphic stability indices proposed in the literature regarding their suitability and limitations in assessing dam formation and stability shows that they predict the probability of dam formation reasonably well, but that their application to longevity estimates requires further assessment. The geomorphic impacts of landslide dams in the short-, medium- and long-term are summarized and illustrated with key examples. Finally, for a better understanding of the factors controlling dam stability, we recommend to (1) include dam composition and sedimentary structures in future case studies, (2) maintain and update the worldwide database for sound statistical analyses, (3) refine landslide dam stability indices and test them for different landslide types, and (4) study hazard cascades related to multiple dams in one watershed. For long-term landscape evolution studies, we suggest to (5) quantify terrestrial sediment flux related to landslide dams, (6) detect ancient landslide dams in river profiles, and (7) further exploit the sediment archives in former impoundment areas. © 2020 Elsevier B.V.
关键词	classification geomorphological impacts landscape evolution landslide dam stability worldwide database
英文关键词	dam failure; failure analysis; geomorphology; landscape evolution; landslide; mass movement; slope stability
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203700
作者单位	State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China; Engineering Geology and Hydrogeology, RWTH-Aachen University, Lochnerstr. 4-20, Aachen, 52066, Germany; Geodynamics Research Centre, Volkolamskoe Shosse 2, Moscow, 125080, Russian Federation; Geohazards and Earth Observation, Geological Survey of Norway, Trondheim, N-7491, Norway; Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Norway; Department of Earth Sciences, University of Firenze, Via La Pira, 4, Florence, 50121, Italy; Department of Geography and Environmental Studies, Wilfried Laurier University, 75 University Avenue West, Waterloo, Ontario N2L 3C5, Canada; School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; Centro de Geosciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico; Ministry of Forests, Lands, Natural Resource Operations, and Rur...
推荐引用方式 GB/T 7714	Fan X.,Dufresne A.,Siva Subramanian S.,等. The formation and impact of landslide dams – State of the art[J],2020,203.
APA	Fan X..,Dufresne A..,Siva Subramanian S..,Strom A..,Hermanns R..,...&Xu Q..(2020).The formation and impact of landslide dams – State of the art.Earth Science Reviews,203.
MLA	Fan X.,et al."The formation and impact of landslide dams – State of the art".Earth Science Reviews 203(2020).