Impact failure models and application condition of trees in debris-flow hazard mitigation

作     者：JIN Ke CHEN Jian-gang CHEN Xiao-qing ZHAO Wan-yu SI Guang-wu GONG Xing-long JIN Ke;CHEN Jian-gang;CHEN Xiao-qing;ZHAO Wan-yu;SI Guang-wu;GONG Xing-long

作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessInstitute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China China-Pakistan Joint Research Center on Earth SciencesCAS-HECIslamabad 45320Pakistan University of Chinese Academy SciencesBeijing 100049China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2021年第18卷第7期

页      面：1874-1885页

核心收录：

学科分类：08[工学] 0837[工学-安全科学与工程] 

基　　金：supported by the National Natural Science Foundation of China (Grant No.41925030) the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No.XDA23090403) the Youth Innovation Promotion Association of the CAS (Grant No.2017426) the National Natural Science Foundation of China (Grant No.51709259) the CAS “Light of West China” Program 

主　　题：Trees Impact failure model Forest application condition Debris flow mitigation 

摘      要：Forestry has played an important role in hazard mitigation associated with debris *** forest mitigation measures refer to the experience of soil and water conservation,which disregard the destructive effect of debris flows,causing potentially serious *** of the effect of a forest on reducing debris-flow velocity and even stopping debris flows requires distinguishing between when the debris flow will destroy the forest and when the trees will withstand the debris-flow impact *** this paper,we summarized two impact failure models of a single tree: stem breakage and *** influences of different tree sizes characteristics(stem base diameter,tree weight,and root failure radius) and debris-flow characteristics(density,velocity,flow depth,and boulder diameter) on tree failure were *** observations obtained from the model adopted in this study show that trees are more prone to stem breakage than *** an increase in tree size,the ability to resist stem breakage and overturning ***-flow density influences the critical failure conditions of trees substantially less than the debrisflow velocity,depth,and boulder *** application conditions of forests in debris-flow hazard mitigation were proposed based on the analysis of the model *** proposed models were applied in the Xiajijiehaizi Gully as a case study,and the results explain the destruction of trees in the forest dispersing *** work provides references for implementing forest measures for debris-flow hazard mitigation.