山洪灾害临界雨量确定方法研究  

Research on determining method for rainfall warning indexes of torrential flood disaster

作　　者：熊威[1] 王姣[1] 胡强[1] 万小强[1] 唐少龙[1] 

机构地区：[1]江西省水利科学研究院,江西南昌330029

出　　处：《江西水利科技》2017年第6期404-408,共5页Jiangxi Hydraulic Science & Technology

摘　　要：针对常规水位流量反推法在确定临界雨量时未考虑前期降雨量作用效果,以及推理公式法确定的小流域汇流时间精度不高的问题,运用流域最大蓄水量估算法,综合考虑前期降雨量,在此基础之上,考虑到分布式水文模型能较好地反映小流域的物理特征,可以得到可靠性较高的汇流时间参数;据此,提出了一种改进的水位流量反推法.实例分析表明,通过建立的模型与方法所确定的临界雨量具有较高的可靠性,该方法可用于山洪临界雨量的计算,并能为其他中小流域的山洪预警提供参考.Aiming at the problem that the conventional water level flow reversal method was not considered for the effect of the early rainfall effect,and the accuracy of the small watershed confluence time which determined by the reasoning formula method was not high,the maximum water storage capacity estimation method was used to consider the preliminary rainfall affect. On the basis of this,considering the distributed hydrological model which can reflect the physical characteristics of small watersheds,reliability high convergence time parameters was get. Accordingly,that an improved water level flow reversal method was constructed. The analysis show that the established model and method were superior accuracy which can be used for the calculation of the critical rainfall of the mountain torrent,that can provide reference for the flash flood warning of other small and medium-sized watersheds.

关 键 词：水位流量反推法 临界雨量 山洪灾害 分布式水文模型 前期降雨量 

分 类 号：TV122.1[水利工程—水文学及水资源]