再论分期设计洪水频率与防洪标准的关系  

Supplementary of relationship between seasonal flood frequency and flood control standard

作　　者：刘攀[1] 郭生练[1] 闫宝伟[1] 李响[1] 陈璐[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《水力发电学报》2011年第1期187-192,共6页Journal of Hydroelectric Engineering

基　　金：国家十一五科技支撑计划(2008BAB29B09);国家自然科学基金项目(5060901750979072);水利部公益性行业科研专项(200701015)

摘　　要：现有的防洪标准的是以年为时间单位推求的防洪设计标准,反映的是平均每年洪水被超过一次以上的概率,没有分析以其他时间为单位的超标准频次问题,按照这种方法设计的分期洪水,年内出现超标准洪水的分期次数有可能增加。本文增加了以分期为时间单位的防洪标准,定义了年均超标准分期数指标Σ1/Ti(Ti为分期i的分期重现期),从而提出了以年为时间单位的标准1/T和以分期为时间单位的标准Σ1/Ti两个准则,扩充了分期洪水中不降低防洪标准的内涵,对分期洪水设计理论进行了补充和完善。分别以隔河岩水库和三峡水库进行实例研究,结果表明,仅仅根据以年为时间单位的分期设计洪水可能会降低防洪标准。The relationship between the frequencies of seasonal flood quantiles and the design flood control standard has been extensively studied.The conclusion is that the frequencies of seasonal flood quantiles should be satisfied with 1 /T.In this paper,by taking into account the occurring times of flood within the seasonal period,a new measure of seasonal flood,named mean of seasonal occurring times,was proposed.Thus,two rules on seasonal flood,1 / T and Σ 1 /Ti were used to evaluate the flood control standard.Case studies of the Geheyan reservoir and Three Gorges reservoir show that the proposed method meets the flood control standard and that it provides a new approach to determining seasonal design floods.

关 键 词：分期洪水 防洪标准 年均超标准分期数 Coupla函数 

分 类 号：TV11[水利工程—水文学及水资源]