The classification of damming landslides and landslide dams induced by the Wenchuan Earthquake
| Autor: | Fan, Xuanmei, Van Westen, C.J., Tang, Chenxiao, Xu, Qiang, Huang, Runqiu, Wang, Gonghui, Lollino, G., Giordan, D., Crosta, G.B., Corominas, J., Azzam, R., Wasowski, J., Sciarra, N. |
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| Přispěvatelé: | Department of Earth Systems Analysis, UT-I-ITC-4DEarth, Faculty of Geo-Information Science and Earth Observation |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Engineering Geology for Society and Territory-Volume 2 ISBN: 9783319090566 Engineering Geology for Society and Territory: Landslide Processes, 2, 1143-1147 |
| Popis: | © Springer International Publishing Switzerland 2015. The devastating 2008 Wenchuan earthquake with a magnitude of Mw 7.9 was the largest seismic event in China in more than 50 years. It triggered numerous landslides over a broad area, some of which dammed rivers, posing severe threats to downstream settlements. The coseismic landslides are classified into rock/debris avalanches, debris flows, rock/debris slides and rock falls. A number of representative examples of each type and the corresponding landslide dam features were studied. According to dam composition material and sedimen-tological features, landslide dams were categorized into three types: dams mainly composed of large boulders and blocks; dams composed of unconsolidated fine debris; and dams with partly intact rock strata at the base topped by large boulders and blocks or soil with rock fragments, showing two-layered or three-layered depositional structure. This classification is linked to the typology of damming landslides and considered to be a preliminary indicator of dam stability. In addition, dam stability also largely depends on valley morphometry as well as landslide runout distance and mechanism. . |
| Databáze: | OpenAIRE |
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