DEBRIS FLOWS IN MOZI GULLY , CHINA FOLLOWING THE 2008 WENCHUAN EARTHQUAKE — IJEGE
 
 
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DEBRIS FLOWS IN MOZI GULLY , CHINA FOLLOWING THE 2008 WENCHUAN EARTHQUAKE



Abstract:
Numerous landslide that provided abundant material for the mobilization of debris flows were triggered in the Mozi gully on the right bank of Mingjiang River in response to the M8.0 Wenchuan earthquake of May 12, 2008. Following the earthquake, debris flows occurred during July through September of 2008 and again in September of 2009. Five of these events blocked the Mingjiang River. This paper estimates the volume of landslide material contributed to the valley by comparing remote sensing images before and after the quake, and analyzes the resultant landslide dams to estimate the volume of material necessary to block the channel. Return periods of debris flows with varying peak discharges are estimated based on empirical formulas and field surveys of the valley.

Authors:
Pengcheng Su - Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu, 610041
Fangqian Wei - Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, 610041
Zunlan Cheng - Graduate School of Chinese Academy of Science, Beijing, 100039, China
Jingjing Liu - Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu, 610041
Keywords
Mozi gully, Wenchuan earthquake, debris flow, landslide, landslide dam.
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