基于Preissman四点隐式差分的洪水位计算方法

Research on flood location calculation method based on Preissman four point implicit difference

针对现有洪水设计计算方法效率较低的问题,为了提高计算速度和时间成本,基于Preissman四点隐式差分的求解模型,并依据一维河网非恒定河流模型的原理,采取差分格式离散求解流程,通过加速比和效率比对算法的效率进行校验,提高了计算效率。

Aiming at the low efficiency of design flood calculation method,in order to improve speed and reduce the time cost,based on Preissman four point implicit difference and the principle of one-dimensional unsteady river model,the difference discrete solution procedure is taking to calculate, the efficiency of algorithm is verified by speed-up ratio and efficiency ratio,the computing efficiency is improved.