干燥剥蚀山地常为暴雨泥石流的多发地段,泥石流对交通、通讯、水利、电力及其他管线设施产生频繁灾害,该地带多不具有对泥石流进行生物或系统工程治理的有利条件,属泥石流灾害治理的特殊地段。但小流域中阵性降水动力形成的泥石流规模和危害力量都有限。因此,应以灾害总治理为目标,以具体工程设施为保护对象。科学地设置畅通排导及减弱泥石流动量的小型工程,则能达到较少的投入并获得最大的社会经济效益。 Dry and denudated mountainous area is often a frequent area of ​​heavy rain and debris flow. Debris flow often causes frequent disasters to traffic, communication, water conservancy, electricity and other pipeline facilities. This area often does not have favorable conditions for biological or systematic engineering of debris flow. Special location However, the scale and hazards of debris flow formed by the formation of precipitation in small watershed are limited. Therefore, we should take the total disaster management as the goal, with specific engineering facilities as the object of protection. Scientifically setting up small projects that can smooth the flow of discharge and reduce the amount of debris flows can achieve less investment and achieve the greatest socio-economic benefits.