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Surface temperature controls the pattern of post-earthquake landslide activity
Marco Loche1, Gianvito Scaringi2, Ali P Yunus3
1Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Faculty of Science, Charles University, Prague, Czech Republic.
Scientific Reports
|January 20, 2022
Summary
Land surface temperature (LST) influences post-earthquake landslides, especially as landscapes recover. Incorporating thermal data improves landslide susceptibility models for better understanding slope stability after seismic events.
Area of Science:
- Geosciences
- Earthquake Science
- Geomorphology
Background:
- Landslide patterns following earthquakes are not fully understood.
- Geostatistical models often overlook thermal influences on slope stability.
- Temperature impacts geomaterial hydro-mechanical behavior, crucial for slope stability.
Purpose of the Study:
- To investigate the relationship between land surface temperature (LST) and landslide patterns over time.
- To develop a multitemporal susceptibility model incorporating LST for the Wenchuan earthquake region.
- To assess the role of thermal information in understanding post-seismic landslide dynamics.
Main Methods:
- Developed a slope unit-based multitemporal susceptibility model.
- Analyzed landslide patterns in relation to land surface temperature (LST).
- Focused on the epicentral region of the 2008 Wenchuan earthquake.
Main Results:
- Land surface temperature (LST) explains post-earthquake landsliding, not coseismic landsliding.
- A positive relationship between LST and landslide persistence emerges as landslide rates decay.
- This suggests thermal sensitivity recovery in slope materials post-earthquake.
Conclusions:
- Thermal information is crucial for physically consistent geostatistical landslide susceptibility models.
- Including LST can enhance our understanding of post-seismic slope stability.
- Further research in diverse contexts is recommended to validate the findings.
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