Characteristics and Preventive Measures of Debris Flows in Urban Areas of Badony in the Reservoir Region of the Three Gorges

摘要

According to the large-scale debris flows broke out in 1991 in Badong, the author analyzed local conditions and influential factors of forming a debris flow in detail. These main causes are strong rainfall, very poorly drained ditches, special geological conditions and collected debris of quaternary in the gulches. On the basis of classification of debris flows, the authors summed up each kind of debris flow's characteristics and genesis. On the economical, effective and easily executed principle, preventive measures are proposed for the potential successive debris flows. The content in the article has important guiding significance for the layout in urban areas of Badong.