同频率直接放大法推求设计洪水过程线  

Direct Amplify Flow Method in Same Frequency to Calculate Design Flood Hydrograph

作　　者：张彦洪[1] 

机构地区：[1]甘肃农业大学水利水电工程系,甘肃兰州730070

出　　处：《人民黄河》2016年第2期48-50,62,共4页Yellow River

摘　　要：为了克服传统的同频率放大修匀法计算繁琐等缺点,提出了一种计算设计洪水的新方法——同频率直接放大法。该法基于洪水峰、量同频率原理计算放大配比,分时段放大典型洪水,可直接得到设计洪水过程线,不需要修匀流量或调整放大倍比以满足洪峰、洪量符合设计频率的要求,避免了修匀的繁琐计算和随意性,能保持典型洪水模式。算例显示,同频率直接放大法推求的设计洪水与传统放大修匀法的结果非常接近,时程分配与典型洪水高度吻合,可在工程设计中参考使用。Here a new theory named direct amplify flow method in same frequency was suggested to calculate design flood. In this method, the design flood hydrograph got from typical flood hydrograph multiplied time?division by the flow amplification ratios which obtained based on the hypothesis of both flood peak and flood volume in same frequency. Compared with traditional method, the main advantage of direct amplify flow method was that it could obtain design flood hydrograph directly, it was no process of smoothing flow curve or adjusting amplification ratios after enlarging typical flood to meet the requirement of same frequency for both flood peak and its volume, so the complicated calculation and arbitrary smoothing were omitted but the typical flood pattern was well maintained in design flood. In this paper, validity of direct amplify flow method in same frequency was proved by a calculating case. Results show that there are no significant differences of design flood values from either new direct amplify method or traditional amplify smoothing flow method, and the design flood time?division of direct amplify flow method has well accordance with that of the given typical flood. Thus, it is obvious that direct amplify flow method in same frequency has more advantage than the traditional flood calculation methods. It can be used as conference in engineering practice.

关 键 词：设计洪水 洪水过程线 直接放大法 放大修匀法 放大倍比 

分 类 号：TV122[水利工程—水文学及水资源]