The 2008 Wenchuan Earthquake Induced Landslides and Associated Rainfall Induced Debris Flows(<Featured Articles>Mega-Earthquake and Geomorphic Hazards)

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The 12 May 2008 Wenchuan earthquake (Mw = 8.0) induced widespread and large scale landslides over an area of about 50,000 km^2, some of which also produced many fatalities and extensive damage to housing settlements and irrigation channels. In addition, highways and bridges were destroyed, and the city of Wenchuan and many other towns became isolated. The Wenchuan earthquake produced large amounts of loose material (landslide debris) that are still present on the steep slopes and in the gullies. This loose material creates an important hazard as subsequent rainstorm can promote the development of devastating debris flows. This paper reviews and presents a preliminary study of the distribution of landslides induced by the Wenchuan earthquake in China. Two typical areas, the Beichuan and Qingchuan area, were selected as pilot studies. The paper further identify and examine the debris flows that occurred in the Beichuan, Longchi, Yingxiu, and Qingping area and analyzes the triggering rainfall characteristics.
2012-10-25