Physically based modeling of co-seismic landslide, debris flow, and flood cascade
<p>The 2008 Wenchuan earthquake lead to various complex multi-hazard chains that included seismically triggered landslide initiation, landslide runout, river damming, dam breaching, and flooding. The modeling of the interactions between such hazardous processes is challenging due to the comple...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2022-10-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | https://nhess.copernicus.org/articles/22/3183/2022/nhess-22-3183-2022.pdf |
| Summary: | <p>The 2008 Wenchuan earthquake lead to various complex
multi-hazard chains that included seismically triggered landslide
initiation, landslide runout, river damming, dam breaching, and flooding.
The modeling of the interactions between such hazardous processes is
challenging due to the complexity and uncertainty. Here we present an
event-based physically based model that is able to simulate multi-hazard
land surface process chains within a single unified simulation. The final
model is used to simulate a multi-hazard chain event in the Hongchun
watershed, where co-seismic landslides led to a landslide dam and, 2 years
later, a debris flow that breached the landslide dam. While most aspects of
the multi-hazard chain are predicted well, the correct prediction of slope
failures remains the biggest challenge. Although the results should be
treated carefully, the development of such a model provides a significant
progress in the applicability of multi-hazard chain simulations.</p> |
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| ISSN: | 1561-8633 1684-9981 |