暴雨山洪与山坪塘漫坝多灾害耦合风险分析  

Analysis of Multi Hazard Coupling Risk Caused by Mountain Flood and Dam Overflow in Shanping Pond

作　　者：张好 敬小非[1] 毛菁鑫 谭会富 张元馨 ZHANG Hao;JING Xiaofei;MAO Jingxin;TAN Huifu;ZHANG Yuanxin(School of Safety Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]重庆科技学院安全工程学院,重庆401331

出　　处：《重庆科技学院学报（自然科学版）》2024年第2期100-107,共8页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目“加筋高堆细粒尾矿坝漫坝破坏宏细观力学特性及其行为预测模型研究”(51974051);重庆市教育委员会科学技术研究项目“极端气候下长历时暴雨型滑坡群灾害智能预警研究”(KJZD-K20230150);重庆科技学院研究生创新计划项目“基于HEC暴雨山洪与山坪塘溃决灾害耦合风险分析”(YKJCX2220708)。

摘　　要：为研究强降雨下山洪与漫坝耦合灾害对下游居民的影响程度和范围,应用HEC-RAS软件构建暴雨山洪与山坪塘漫坝多灾害耦合模型。首先,以重庆市巴南区某山坪塘为研究对象,根据巴南区暴雨强度公式设计不同重现期的降雨雨型;其次,借助数字高程数据对山坪塘进行原始构建,采用参数化模型对溃坝楔口参数进行预测,结合物理溃坝机制模拟漫坝过程;最后,选取洪水深度、洪水流速和洪水滞留时间等3个评价指标进行洪水风险分析。研究结果表明,突发强降雨下的山洪形成迅速且山坪塘发生漫坝的机率极大;山坪塘漫坝会加重附近区域的洪水风险等级。In order to study the impact degree and scope of coupling hazards caused by mountain flood and dam overflow on downstream residents under heavy rainfall,HEC-RAS software was used to construct a multi-disaster coupling model of mountain flood and dam overflow in Shanping pond.Firstly,taking a Shanping pond in Banan District of Chongqing as the research object,several rainfall patterns of different recurrence periods were designed according to the rainstorm intensity formula in Banan District.Secondly,with the help of digital elevation data,the original construction of Shanping pond is carried out,the parameters of dam overflow wedge are predicted by parametric model,and the dam overflow process is simulated by the physical dam overflow mechanism.Finally,the flood risk analysis is carried out by selecting three evaluation indexes:flood depth,velocity and retention time.The results show that under the sudden heavy rainfall,the mountain flood forms rapidly and the probability of dam overflow in Shanping pond is great.The overflow dam of Shanping pond will increase the flood risk level in the nearby area.

关 键 词：暴雨山洪 山坪塘漫坝 HEC-RAS 多灾害耦合 

分 类 号：X913.4[环境科学与工程—安全科学]