基于长办汇流曲线的多模型联合洪水演算研究

传统长办汇流曲线采用试算法确定稳定流的河段传播时间K值时,计算过程繁琐且不一定能得到最优解。基于此,提出利用遗传算法求解马斯京根模型的河段传播时间,进而优化长办汇流曲线模型的参数K。该方法既充分利用了长办汇流曲线模型中的经验性汇流系数,又融入了改进马斯京根法,可以保证参数全局最优的特点,有效提高了河道洪水演算精度,为河道洪水演算研究提供了一种多模型联合求解的新思路。

Study on flood routing by combined model based on Confluence Curves of Yangtze Water Resources Commission

When trial-and-error method is adopted to calculate the steady flow propagation time (parameter K) by tradition-al Confluence Curves of Yangtze Water Resources Commission , the computing process is complex and it is difficult to obtain the global optimal solution .It is put forward that the parameter K of the confluence curves can be optimized by the travel time solu -tion of Muskingum Mode on the basis of genetic algorithm .This method makes full use of empirical confluence index of the con-fluence curves and the advantages of improved Muskingum Model in obtaining the global optimal solution .The study provides a new way for river flood calculation .