Numerical Analysis of Emergency River Restoration Scheme for Qingping Mega Debris Flow

作     者：CHEN Ri-dong LIU Xing-nian HUANG Er GUO Zhi-xue 

作者机构：State Key Laboratory of Hydroscience and EngineeringTsinghua University State Key Laboratory of Hydraulics and Mountain River EngineeringSichuan University 

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

年 卷 期：2013年第10卷第1期

页      面：130-136页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0303[法学-社会学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0837[工学-安全科学与工程] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：supported by the National Basic Research Program of China ("973" Project) (Grant No. 2011CB409903) the National Natural Science Foundation of China (Grant No. 50739002) 

主　　题：河道综合整治 数值分析 泥石流 河流生态修复 水沙数学模型 流模型 建设项目 地震灾区 

摘      要：The mega debris flow occurred on August 13 th 2010 in Qingping town,China(hereafter called 8.13 Debris Flow) have done great damage to the local habitants as well as to the re-construction projects in the quake-hit areas,and the channel-fill deposit problem caused by the debris flow was the most ***,it is of high possibility that an even severe deposit problem would reappear and result in worse *** order to maximize risk reduction of this problem,relevant departments of the government established a series of emergency river restoration schemes,for which the numerical analysis is an important procedure to evaluate and determine the optimized *** study presents a numerical analysis by applying a twodimensional debris flow model combined with a relevant water-sediment model to simulate the deposit during the progress of the debris flow,and to calculate and analyze the river flow field under both the present condition and different restoration *** results show that the debris flow model,which takes the confluence of the Wenjia Gully to the main river into account,could simulate the deposit process quite *** the reproduced debris flow from the simulation of the 8.13 Debris Flow,the original river flow path has switched to a relatively lower place just along the right bank with a high speed of near 7m.s-1 after being blocked by the deposit,which is highly *** prevent this hazard,a recommended scheme is derived through inter-comparison of different restoration *** shows that the recommended scheme is able to reduce the water level and as well to regulate the flow *** on the given conditions of the mainstream and the tributary confluence for the simulated 8.13 Debris Flow,when encountering a debris flow with deposit volume less than 0.5 million m3,the river channel can endure a 20-year return flood;however,when the deposit volume increases to 2 million m3,the flood capacity of the river will be