云南省熊家拐拐泥石流特征与防治措施

Characteristics of Xiongjia Guaiguai Debris Flow on Prevention in Yunnan

摘要:

熊家拐拐泥石流是一条典型的弃渣面蚀型泥石流。在现场实地调查的基础上,系统分析了熊家拐拐泥石流分区特征、动力学参数特征,探讨了弃渣面蚀型泥石流的成因机制。研究认为,熊家拐拐泥石流规模小、流速快、过程时间短、冲击力大、隐蔽性强,是一种致灾性极强的自然灾害,常伴有强渗透性的松散物源,持续降雨和短时强降雨的组合降雨模式以及利于汇水的陡峻地形等条件。针对此类泥石流的特点,提出了稳坡、拦挡、排水相结合的防灾减灾措施,为该类泥石流防灾减灾提供借鉴。

Abstract:

Xiongjia Guaiguai debris flow is a typical spoil sheet erosion-induced debris flow. Based on field investigations, this paper systematically analyzes the zonal characteristics and dynamic parameter characteristics of Xiongjia Guaiguai debris flow, and discusses the genesis mechanism of spoil sheet erosion-induced debris flow. The study holds that Xiongjia Guaguai debris flow, featuring small scale, high flow velocity, short process duration, large impact force and strong concealment, is an extremely destructive natural disaster. Its formation is attributed to several conditions, including loose material sources with strong permeability, a combined rainfall pattern of lasting rainfall and short-duration heavy rainfall, and steep terrain conducive to water convergence. In view of the characteristics of such debris flow, disaster prevention and mitigation measures combining slope stabilization, retaining and drainage are proposed, which can provide a reference for the disaster prevention and mitigation of this type of debris flow.