Modeling compound flooding in coastal systems using a computationally efficient reduced-physics solver: Including fluvial, pluvial, tidal, wind- and wave-driven processes
Modeling compound flooding in coastal systems using a computationally efficient reduced-physics solver: Including fluvial, pluvial, tidal, wind- and wave-driven processes
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DOI：
10.1016/j.coastaleng.2020.103796
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发表时间：
2021-01-01
影响因子：
4.4
通讯作者：
van Dongeren, Ap
中科院分区：
文献类型：
--
作者：
Leijnse, Tim;van Ormondt, Maarten;van Dongeren, Ap
SFINCS是一种新的简化物理解算器，用于计算沿海系统中由于河流、洪水、潮汐、风和波浪驱动过程引起的复合洪水，并通过大量的验证和应用案例进行了验证。该模型解决了简化的质量和动量方程，这是由风暴潮和波浪边界条件，降水率和上游河流流量驱动。它包括空间变化的渗透和床粗糙度条款，以及吸收生成向海边界，使波浪驱动的洪水。此外，平流和风应力项可以包括在内。我们证明了应用程序的情况下，飓风的影响杰克逊维尔（佛罗里达，美国），所观察到的洪水是一个组合的河流，洪水，潮汐和风驱动的洪水，这可以很好地使用简化的物理求解器建模。我们发现，除了一个平流项的动量方程是必要的模型冲击流，如溃坝，但也入射破碎波。因此，波浪驱动的洪水可以模拟与高计算效率和足够的准确性，证明了Hernani（菲律宾）的情况。模型结果表明，在有限的计算费用实现良好的精度的潜力。
SFINCS, a new reduced-physics solver to compute compound flooding in coastal systems due to fluvial, pluvial, tidal, windand wave-driven processes in a computationally efficient way, is presented and validated for a number of verification and application cases. The model solves simplified equations of mass and momentum, which are driven by storm surge and wave boundary conditions, precipitation rates and upstream river discharges. It includes spatially-varying infiltration and bed roughness terms as well as an absorbing-generating seaward boundary to enable wave-driven flooding. Furthermore, advection and wind stress terms can be included. We demonstrate for the application case of hurricane impact on Jacksonville (Florida, USA) that the observed flooding was a combination of fluvial, pluvial, tidal and wind-driven flooding and that this can be modeled well using the reduced-physics solver. We show that the addition of an advection term to the momentum equations is necessary to model shock flows such as dam breaks but also incident broken waves. Thus, wave-driven flooding can be modeled with high computational efficiency and adequate accuracy as demonstrated for the case of Hernani (the Philippines). The model results show the potential of achieving good accuracy at limited computational expense.