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小流域往往无实测水文资料,设计洪水需要间接推求。工程设计时,往往需要没有实测流量资料小流域的设计流量和断面水位流量关系。根据实际工作体会和理解,以推求跨越佛垌沟的白沙水库大桥断面设计洪水为例子,对无实测资料的小流域推求暴雨洪水方法进行探讨。文章探讨用周边降水量系列资料,推求小流域设计洪水的方法,并做精度检验。以一个小流域的实例,阐述推求小流域设计洪水流量、水位的方法。
Small watersheds often lack actual hydrological data, and design floods require indirect deduction. Engineering design, often do not have the actual flow of small watershed design flow and cross-section water level relationship. According to the practical experience and understanding, the design flood of Bai Sha reservoir bridge crossing Puyou ditch is taken as an example to discuss the method of inferring rainstorm and flood in small watershed without measured data. This paper discusses a series of methods to estimate the design flood of small watershed based on a series of peripheral precipitation data, and then conducts precision tests. Taking a small watershed example, the method of deducing the design flood flow and water level of small watershed is expounded.