溢水概念化和水头损失系数在河流淹没模拟准二维方法中的重要性

IF 0.7 Q4 MANAGEMENT
Mauricio Villazón, P. Willems
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引用次数: 5

摘要

在准二维方法中,洪泛平原是通过一个虚拟的河流分支网络,通过一个一维的水动力模拟系统,与有溢出的主河相连。本文分析了不同溢油模型概念的影响以及所选水头损失系数的影响。比利时丹德河的缩小区域在三个不同的河流建模软件包中实现:Mike11, InfoWorks-RS和HEC-RAS。模拟了3次历史洪水事件和8次人工洪水事件。对堤岸至洪涝支流的最大水量、洪峰流量和洪泛区水位进行了评价和比较。改变溢水的水头损失系数表明,洪泛平原内水位的变化小于10厘米,而三个模型包之间的结果差异高达25厘米。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The importance of spill conceptualizations and head loss coefficients in a quasi two-dimensional approach for river inundation modelling
In a quasi two-dimensional approach, floodplains are modelled by means of a one-dimensional hydrodynamic modelling system through a network of fictitious river branches linked to the main river with spills. This paper analyses the effect of different spill model conceptualizations as well as the effect of selected head loss coefficients. A reduced area of the river Dender in Belgium was implemented in three different river modelling packages: Mike11, InfoWorks-RS and HEC-RAS. Simulations were conducted for three historical flood events and eight synthetic events. Evaluation and comparison was made for the maximum volume of water that passes through the banks to the flood branches, the peak discharges and the water levels in the floodplains. Varying the spill’s head loss coefficients shows variations less than 10 cm for the water level inside the floodplain, while the differences in results between the three modelling packages are as large as 25 cm.
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