防灾减灾工程学报2012，Vol.32Issue(6)：759-765,7.
汶川地震灾区坡面和沟谷泥石流冲出距离计算方法
Empircial Approaches to Caculating Runout Distance of Hillslope Debris Flow and Channelized Debris Flow in Wenchuan Earthquake Zone
摘要
Abstract
Hillslope debris flow and channelized debris flow are very different in formation and movement. This indicates their runout distances cannot be described by a single model. Investigation of the two kinds of debris flow in the Wenchuan earthquake zone shows that the principal factors influencing the runout distances are different. For channelized debris flow, the principal factor is volume of sediment supply, while for hillslope debris flow the factors are relative height and volume of debris. Comparing with debris flow in Alps area, the run-out angle of the two kinds of debris flow in the earthquake area also exhibits different characteristics. The run-out angle of channelized debris flow ranges from 29. 6° to 82- 9°, which is characterized by "great magnitude and large runout angle", whereas the angle of slope debris flow from 25° to 47°, which is characterized by "small magnitude and small runout angle". The data of debris-flow events in Beichuan and Qingping of the earthquake zone were used to respectively derive the empirical formulas for calculating the runout distance of hillslope debris flow and channelized debris flow by statistical regressive method. The resulted formulas were verified by two cases, and can be applied to post-quake debris flow.关键词
汶川地震/坡面型泥石流/沟谷型泥石流/冲出距离Key words
Wenchuan earthquake/ hillslope debris flow/ channelized debris flow/ runout distance分类
天文与地球科学引用本文复制引用
马超,胡凯衡,崔鹏,雷发洪..汶川地震灾区坡面和沟谷泥石流冲出距离计算方法[J].防灾减灾工程学报,2012,32(6):759-765,7.基金项目
国家重点基础研究发展计划项目(2011CB409902)、中国科学院成都山地灾害与环境研究所青年百人团队项目(110900K235)、国家自然科学基金重点项目(41030742)资助 （2011CB409902）
