Modeling subgrid-scale topographic effects on shallow marsh hydrodynamics and salinity transport
Modeling subgrid-scale topographic effects on shallow marsh hydrodynamics and salinity transport
复制标题
模拟亚网格尺度地形对浅沼泽水动力和盐度输送的影响
DOI：
10.1016/j.advwatres.2019.05.004
复制
发表时间：
2019
影响因子：
4.7
通讯作者：
B. Hodges
中科院分区：
文献类型：
--
作者：
Zhi Li;B. Hodges
一个二维深度集成的亚网格水动力学模型（FrehdC）的目的是模拟亚网格尺度地形对流动和标量输运在浅水沿海沼泽使用计算效率高的网格单元，比许多通过沼泽的渠道化路径粗糙的影响。亚网格尺度地形参数化为四个深度相关变量（亚网格单元体积和三个亚网格面面积），其特征在于粗网格单元的高分辨率功能。这些变量被预先存储在一个表格中，并嵌入到控制方程中作为模型输入，以缩放细胞表面的细胞储存、质量和动量通量。一个块检查程序的目的是自动保持高分辨率的表面连接在网格粗化。通过对人工区域和真实的沼泽地的试验，该模型能够以较小的计算量逼近细网格的水面高程、淹没面积、流速和盐度模拟结果。
A 2D depth-integrated subgrid hydrodynamic model (FrehdC) is designed to simulate effects of subgrid-scale topography on flow and scalar transport in shallow coastal marshes using computationally-efficient grid cells that are coarser than many of the channelized paths through the marsh. The subgrid-scale topography is parametrized into four depth-dependent variables (subgrid cell volume and three subgrid face areas) that characterize the high-resolution features of coarse grid cells. These variables are pre-stored in a table and embedded into the governing equations as model inputs to scale cell storage, mass and momentum fluxes across cell faces. A block-checking procedure is designed to automatically preserve high-resolution surface connectivity during grid-coarsening. By testing on both synthetic domain and real marshes, this new model is able to approximate fine-grid simulation results of surface elevation, inundation area, flow rate and salinity with less computational cost.
影响因子：
6.4
作者：
Chen, Albert S.;Evans, Barry;Savic, Dragan A.
通讯作者：
Savic, Dragan A.