Distinctive controls on the distribution of river-damming and non-damming landslides induced by the 2008 Wenchuan earthquake
| Autor: | Gianvito Scaringi, Jing Ren, Xuanmei Fan, Qiang Xu, Ran Tang, C.J. van Westen, Hans-Balder Havenith |
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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: | 2019 |
| Předmět: |
Peak ground acceleration
Surface rupture Lithology 0211 other engineering and technologies 02 engineering and technology Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Landslide dam Geomorphology 021101 geological & geomatics engineering 0105 earth and related environmental sciences Weight of evidence geography geography.geographical_feature_category Geology Landslide Geotechnical Engineering and Engineering Geology 22/4 OA procedure Controlling factors Wenchuan earthquake ITC-ISI-JOURNAL-ARTICLE Spatial ecology |
| Zdroj: | Bulletin of engineering geology and the environment, 78, 1-19. Springer |
| ISSN: | 1435-9529 |
| Popis: | The 2008 Wenchuan earthquake (China, M w 7.9) highlighted the importance of assessing and mitigating the hazards from co-seismic landslides and landslide dams. The seismic shaking triggered hundreds of thousands of landslides, about 800 of which dammed the course of rivers. To understand whether distinctive factors concurred with the river-damming events, we analyzed the spatial patterns of the river-damming landslides and the non-damming landslides separately, with reference to a number of possible controlling factors. Then, we quantified the significance of these factors using the weight of evidence method, and we used the results to perform a susceptibility assessment in a portion of the earthquake-affected region to verify the effectiveness of the method. We find that the distance to the fault surface rupture, peak ground acceleration (PGA) and lithology play a controlling role for co-seismic landslides of any type. The occurrence of river-damming landslides, rather than by a specific lithology or topography, is more related to hydrological factors, while topographic controls (slope, internal relief and terrain roughness) are more significant for the non-damming landslides. |
| Databáze: | OpenAIRE |
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