摘要
由极端暴雨引发的山洪灾害已成为阻碍社会经济发展的主要因素,为科学认识山洪形成过程,揭示山洪致灾机理,以湖北省柳林镇“8·12”重大山洪灾害为例,基于全国山洪灾害调查分析评价数据结合实地调查,采用自主研发的FFMS(Flash Flood Modelling System)分布式水文模型对柳林镇暴雨山洪过程进行反演模拟.从洪水来源、产流组分变化入手,深入剖析此次山洪灾变响应过程.结果表明:采用时空变源山洪模拟方法,可以准确分析山洪过程流域产流机理及组分变化,实现对暴雨山洪过程的精细刻画.柳林镇“8·12”重大山洪灾害成因主要在于该地区超历史极值暴雨导致上游3条支流所在流域超渗产流量激增,特殊的地形条件和地理位置造成主、支流洪峰几乎同时在柳林镇断面遭遇叠加,加之下游莲花溪洪水汇流浪河后形成顶托,共同作用下导致山洪灾害放大效应,给柳林镇造成重大人员伤亡.
The flash flood caused by extreme rainfall has become one of significant obstacles that highly affected the social economic development.In order to scientifically understanding the mechanism of flash flood disaster and to produce technological support to the work of local flood prevention and control,the FFMS distributed hydrological model has been applied to assess the disaster process.Taking the"8·12"flash flood disaster at Liulin County of Hubei Province as an example,the analysis was made based on the numerical simulation of flood sources and runoff component.The results show that the spatiotemporal variable source mixed runoff modelling approach is able to accurately represent the flood process and the variation of runoff component during the flood duration,and to clearly reveal the disaster mechanism.The main cause of this disaster is due to the flow peak superposition which consisted by the three flood peak came from different tributaries met at same time at the Liulin County.Moreover,the peak flow of the Lianhua river at the downstream also arrived at same time which strongly affect flow progress and enhance the flood damages.
作者
郝思佳
王文川
马强
李昌志
刘昌军
HAO Sijia;WANG Wenchuan;MA Qiang;LI Changzhi;LIU Changjun(College of Information Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;College of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2024年第1期133-144,共12页
Journal of Basic Science and Engineering
基金
国家重点研究计划项目(2019YFC1510603)。
关键词
山洪灾害
致灾机理
产流组分变化
水文模拟
洪水分析
flash flood
disaster mechanism
run-off component
hydrological simulation
flood analysis
作者简介
郝思佳(1992-),女,博士.E-mail:haosijia@ncwu.edu.cn;通信作者:马强(1987-),男,高级工程师.E-mail:maqiang@iwhr.com。
