以matlab为平台,应用遗传算法和matlab工具箱中的统计函数,通过求解还原洪水过程与实测洪水过程之差绝对值的加权之和最小化问题来优化估计瞬时单位线的参数,避免了用近似公式法求解带来的方法误差.实例研究表明该方法是有效的,其精度明显高于矩法,也较近似公式法高.
A new method of genetic algorithm based on matlab software is presented to optimize the parameters of instantaneous unit hydrograph. The statistical function gamcdf( x,A ,B ) in matlab toolbox is used to calculate S(t) curve, which avoids the errors caused by approximation method. The case study shows that this method is feasible, and the precision by using this method is higher than that by the method of moment.