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Position: Home > Articles > Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province Bulletin of Soil and Water Conservation 2010,30 (1) 227-231

川西地区低频率泥石流的特征

作  者：
林明安;王士革;范晓岭;卢铖昀
单  位：
北京城建勘测设计研究院有限责任公司;中国科学院研究生院资源与环境学院;中国土木工程集团有限公司;中国科学院水利部成都山地灾害与环境研究所
关键词：
泥石流;低频率;特征;川西地区
摘  要：
泥石流按其暴发频率分为高频率(每年发生一次或多次)、中频率(数年至30a发生一次)和低频率(30a以上发生一次)泥石流3类。低频率泥石流具有暴发周期长,规模大,危害严重等基本特点。选取川西地区不同频率的泥石流沟道进行对比研究,结果表明,该区低频率泥石流还具有两个典型特征:低频率泥石流流域具有植被覆盖度高,不良地质现象数量少且规模小的特点;低频率泥石流在侵蚀过程中以沟床冲刷为主且侵蚀速度快,泥砂输移比高。关于低频率泥石流上述两点特征的研究,对泥石流的预防和治理有重要指导意义。
译  名：
Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province
作  者：
LIN Ming-an1,2,WANG Shi-ge1,FAN Xiao-ling3,LU Cheng-yun4 (1.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Conservancy,Chengdu,Sichuan 610041,China;2.Department of Resources and Environment,Graduate University of Chinese Academy of Sciences,Beijing 100049,China;3.Beijing Urban Construction Exploration & Surveying Design Research Institute Co.,LTD.,Beijing 100101,China;4.China Civil Engineering Construction Corporation,Beijing 100038,China)
关键词：
debris flow;low-frequency;characteristics;Western Sichuan Province
摘  要：
Debris flow can be divided into three types according to its outbreak frequency:high-frequency (one or many times in a year),medium-frequency (one time in several to 30 years),and low-frequency (one time in more than 30 years).Low-frequency debris flow often burst fiercely without any anticipation and cause serious harm.Based on the analysis of the data from debris flow gullies with different outbreak frequencies,the characteristics of low-frequency debris flow are summarized.Watersheds with Low-frequency debris flow are characterized by high vegetation coverage and a small number and small-scale of adverse geological phenomena.The groove bed scour of low-frequency debris flow is dominant and erosion rate and sediment transport capacity are high.Understanding the characteristics of low-frequency debris flow has important significance in guiding debris flow prevention.

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