基于数值解法的调洪演算探究

Research on Flood Regulation Calculation Based on Numerical Method

传统的调洪演算方法主要有列表试算法、半图解法、简化三角形法。传统方法普遍存在计算繁琐、精度不高、容易出错、不宜计算机操作等缺点,不适用于时间紧、任务重的水利工程规划设计。数值解法是利用Excel的数据分析和处理功能,能准确、快速地进行调洪演算,避免人为读图误差。为此,以马鞍山市雨山区姜家沟分洪闸设计为工程案例,对姜家沟来水过程线、水位-库容曲线及水位-泄量关系曲线进行了调洪演算,最终得到当上游来水在第13 h时,此时下泄流量最大为18.64 m^(3)/s,相对应的最高库水位为9.08 m。其计算结果可应用于姜家沟分洪闸工程设计,同时为类似工程提供方法借鉴。

The traditional flood regulation methods include Tabular computation,semi-graphical method and Simplified trigonometry.The traditional method has many shortcomings,such as complicated calculation,low accuracy,easy to make mistakes and not suitable for computer operation,and not applicable for water conservancy project planning and design with tight time and heavy task.Numerical solution is to use powerful data analysis and processing function of Excel,which can accurately and quickly carry out flood regulation calculation,and avoid manual reading errors.This paper takes the design of Jiangjiagou flood sluice in Yushan District of Ma'anshan City as an engineering case.The water flow process line,water level-storage capacity curve and water level-discharge relationship curve of Jiangjiagou were calculated.Finally,when the upstream water arrives at 13h,the maximum discharge is 18.64 m^(3)/s,and the corresponding maximum reservoir water level is 9.08 m.The calculation results can be applied to the design of Jiangjiagou flood sluice and provide reference for similar projects.