When utilizing a finite volume method to predict outburst flood evolution in real geometry, the processing of wet-dry front and dry cells is an important step. In this paper, we propose a new approach to process wet-dry front and dry cells, including four steps: (1) estimating intercell properties; (2) modifying interface elevation; (3) calculating dry cell elevations by averaging intercell elevations; and (4) changing the value of the first term of slope limiter based on geometry in dry cells. The Harten, Lax, and van Leer with the contact wave restored (HLLC) scheme was implemented to calculate the flux. By combining the MUSCL (Monotone Upstream–centred Scheme for Conservation Laws)-Hancock method with the minmod slope limiter, we achieved second-order accuracy in space and time. This approach is able to keep the conservation property (C-property) and the mass conservation of complex bed geometry. The results of numerical tests in this study are consistent with experimental data, which verifies the effectiveness of the new approach. This method could be applied to acquire wetting and drying processes during flood evolution on structured meshes. Furthermore, a new settlement introduces few modification steps, so it could be easily applied to matrix calculations. The new method proposed in this study can facilitate the simulation of flood routing in real terrain.

中文翻译：

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突水洪水模拟的干湿前沿处理新方法。

当使用有限体积方法来预测实际几何形状中的爆发洪水演变时，湿干前缘和干细胞的处理是重要的一步。在本文中，我们提出了一种处理干湿前和干电池的新方法，包括四个步骤：（1）估计电池间性能；（2）修改界面标高；（3）通过平均小区间高度来计算干小区高度；（4）根据干电池中的几何形状改变斜率限制器的第一项的值。采用具有恢复的接触波（HLLC）方案的Harten，Lax和van Leer来计算通量。通过将MUSCL（单调上游定律为中心的保护法）-Hancock方法与minmod斜率限制器相结合，我们获得了时空的二阶精度。这种方法能够保留守恒属性（C属性）和复杂床几何形状的质量守恒。这项研究中的数值测试结果与实验数据一致，验证了该新方法的有效性。该方法可用于在结构网格上的洪水演化过程中获取润湿和干燥过程。此外，新的解决方案引入了很少的修改步骤，因此可以轻松地应用于矩阵计算。这项研究中提出的新方法可以方便地模拟真实地形中的洪水泛洪。该方法可用于在结构网格上的洪水演化过程中获取润湿和干燥过程。此外，新的解决方案引入了很少的修改步骤，因此可以轻松地应用于矩阵计算。这项研究中提出的新方法可以方便地模拟真实地形中的洪水泛洪。该方法可用于在结构网格上的洪水演化过程中获取润湿和干燥过程。此外，新的解决方案引入了很少的修改步骤，因此可以轻松地应用于矩阵计算。这项研究中提出的新方法可以方便地模拟真实地形中的洪水泛洪。