基于GIS考虑准动态湿度指数的滑坡危险性预测水文–力学耦合模型研究

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Abstract Rainfall plays a key role in the regional shallow landslide hazards prediction. Considering quasi-dynamic wetness index，a hydrology-mechanical coupling model in landslide hazards prediction is proposed. It has combined the physical processes of the infinite slope model and simplified kinematic wave model based on digital elevation model(DEM)，and considered the comprehensive effect of topography and surface water infiltration and groundwater run out converted from rainfall to landslide stability. Based on geographic information system(GIS)，vector-raster coupled data is used in the slope unit hazard prediction(taking slope unit as basic study object，and using raster data to analyze the slope units stability). Firstly，it deduces and modifies the infinite slope model by limit equilibrium theory. Then，considering the rainfall intensity and duration，it calculates quasi-dynamic wetness index during rainfall infiltration and groundwater run out by simplified kinematic wave model，and the time and spatial distribution of landslide saturation factor are obtained. The hydrology model and infinite slope model is coupled on this basis. Finally，it approves the high accuracy of this model in regional shallow landslide hazard prediction by the example study in new Badong County.

Key words： slope engineering landslide hazards prediction quasi-dynamic wetness index hydrology-mechanical coupling model

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	Articles by authors
	WANG Jiajia
	YIN Kunlong
	DU Juan
	WANG Yili

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WANG Jiajia,YIN Kunlong,DU Juan, et al. RESEARCH ON HYDROLOGY-MECHANICS COUPLING MODEL OF LANDSLIDE HAZARDS PREDICTION BASE ON GIS BY USING QUASI-DYNAMIC WETNESS INDEX[J]. , 2013, 32(s2): 3868-3877.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3868

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