MATLAB在洪水过程同频率放大计算中的应用

Application of MATLAB in flood process homogeneous frequency enlargement calculation

在设计洪水过程线计算中,同频率放大法是最常用的方法之一,但该法在计算中因为各时段流量放大倍比不一致,放大后需要多次人工修整,耗时较多且易造成过程线过度变形。为了使计算结果更客观,过程更高效,可以利用MATLAB软件的计算工具,通过程序优化计算,得到与典型洪水过程形态差异最小的设计洪水过程。本文以南亚地区某大型水库设计洪水为例,阐述MATLAB程序最优化算法工具在设计洪水过程同频率放大计算中的应用方法。

The homogeneous frequency enlargement method is one of the commonly used methods in the design flood hydrograph calculation. But the multiple proportions are different in each duration unit discharge in the calculation, the flood hydrograph need the multiple artificial adjustments after the enlargement. The hydrograph is easily over deformed and the calculation consumes the more time. In order to make the calculation result more objective and the process more efficient, the calculation tool of MATLAB software is used to obtain the design flood process with the least morphological difference of the typical flood process by through the program optimization calculation. Taking the design flood of a large reservoir in South Asia as an example, the paper introduces the application method of the optimization algorithm tool of MAT LAB software in the homogeneous frequency enlargement calculation of the design flood.