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- 2016
双层异步迭代洪水演进模拟算法
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Abstract:
均一化迭代是基于栅格数据的洪水演进模拟常采用的迭代策略，存在设定迭代步长与栅格单元实际所需时间不一致的问题，直接影响到栅格单元水位、流量的计算精度。针对该问题，提出了一种双层异步迭代策略。外层迭代控制洪水演进时刻，内层迭代则通过分析不同栅格单元洪水的流速特征，实现迭代步长及迭代次数的自适应设定。采用商用FloodArea软件、均一化迭代算法及双层异步迭代算法，分别对福建省万安流域暴雨洪水历史数据进行模拟。该算法模拟结果的平均误差比FloodArea小0.361 m，比均一化迭代算法小0.654 m，说明该算法能有效提高洪水演进模拟的整体精度
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