Model study of predicting rainstorm induced landslide and debris flow at Niumian Gully, the focal area of 20080512 Earthquake.

Abstract

Abstract:

Niumian Gully, the study area located at southern part of linearity focus region of 5.12 Earthquake. Suffered from intensely seismic forces, mountain ground was seriously damaged and numerous landslides and debris flows occurred. Based on the established conceptual model of rainstorm induced landslide, debris flow and the mathematical expressions of riskiness' assessment of landslides and debris flows that introduced by author's previous paper, the necessary geological factors and their specific elements used in the model was determined by considering the characteristics of geological environment and disaster of study area. And by using digital landslide technique these data of each specific element was obtained. Then after defined the rainfall threshold level by analyzing with similar geological environment and climate conditions, the model of forecast rainstorm induce landslide and debris flow is completed at last. According to the model the hazard level for landslide and debris flow occurring in each place of the study area will be forecast.

Key words: Niumian Gully, 5.12 Wenchuan Earthquake, focal area, landslide, debris flow, rainfall threshold

CLC Number:

P694
TP79

WANG Chi-Hua, GUO Zhao-Cheng, DU Meng-Liang, CHENG Zun-Lan. Model study of predicting rainstorm induced landslide and debris flow at Niumian Gully, the focal area of 20080512 Earthquake.[J]. Earth Science Frontiers, 2012, 19(1): 228-238.

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Model study of predicting rainstorm induced landslide and debris flow at Niumian Gully, the focal area of 20080512 Earthquake.

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