Faculty of Geo-Information Sciences and Earth Observation (ITC), University of Twente, Twente, the Netherlands
Received: 29 May 2016 – Discussion started: 03 Jun 2016
Abstract. Large earthquakes in mountainous regions may trigger thousands of landslides, some active for years. We analysed the changes in landslide activity near the epicentre of the 2008 Wenchuan earthquake by generating five landslide inventories for different years through stereoscopic digital visual image interpretation. From May 2008 to April 2015, 660 new landslides occurred outside the co-seismic landslide areas. In April 2015, the number of active landslides had gone down to 66, less than 1 % of the co-seismic landslides, but still much higher than the pre-earthquake levels. We expect that the landslide activity will continue to decay, but may be halted if extreme rainfall events occur.
Revised: 21 Oct 2016 – Accepted: 09 Nov 2016 – Published: 12 Dec 2016
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Tang, C., Van Westen, C. J., Tanyas, H., and Jetten, V. G.: Analysing post-earthquake landslide activity using multi-temporal landslide inventories near the epicentral area of the 2008 Wenchuan earthquake, Nat. Hazards Earth Syst. Sci., 16, 2641-2655, doi:10.5194/nhess-16-2641-2016, 2016.