DISCUSSION ON GENESIS AND DEVELOPMENT TREND CONTROLENGINEERING OF DEBRIS FLOW IN NIUMIANGOU VALLEY
Yang Zhiquan 1,2) ;Liao Liping 1,2) ;Yang Wanke 3) ; and Hu Jin 1,2)
1)Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy/ Key Laboratory of Mountain Hazards and Earth Surface Processes,Chinese Academy of Sciences,Chengdu 6100412)Graduate University of Chinese Academy of Sciences,Beijing 1000493)Department of Civil Engineering and Applied Mechanics，Sichuan University，Chengdu 610065
Abstract：After Wenchuan earthquake,Niumiangou valley becomes an area with dense and frequent debris flow disasters; so far, seven largescale debris flows occurred. In this valley there are three basic conditions making debris flow well develop, and so it is in a developing stage now.Thus the largescale rainfall induced debris flow disasters, with large damage and stronger wallop, will easily occur in the 5-10 year after earthquake. If considering to use directly the debris flow deposit in the main gully of Niumiangou valley, to construct civil control engineering such as alternate landslide dams from earth and rock with about half of main gully width in the left and right sides of upper and middle of the accumulation area, landslide dams from earth and rock with approximately equal to main gully width in middle and lower of the accumulation area and slope with certain gradient and relative to gully orientation between two adjacent dam, then the dualpurpose of energy dissipation and consumption can be achieved.
Yang Zhiquan,Liao Liping,Yang Wanke et al. DISCUSSION ON GENESIS AND DEVELOPMENT TREND CONTROLENGINEERING OF DEBRIS FLOW IN NIUMIANGOU VALLEY[J]. jgg, 2011, 31(5): 71-74.
