Analysis on material conditions causing to debris blow and its control countermeasures in Boddhidharma Trench

The Boddhidharma trench in Mentougou District of Beijing City is an ancient debris blow trench,where have occurred several times severe debris flow disasters.The conditions of geology,landform,hydro meteorology,soil cover and human beings engineering activities are analyzed by using field investigation,geological exploration and laboratory experiment,based on the history of disasters and development characteristics in the drainage basin of Boddhidharma trench.The properties of debris flow is asc...