Development of a two‐dimensional finite element model for inundation processes in the Tonle Sap and its environs
Development of a two‐dimensional finite element model for inundation processes in the Tonle Sap and its environs
复制标题
开发洞里萨湖及其周边地区洪水过程的二维有限元模型
DOI：
10.1002/hyp.6942
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
K. Shimizu
中科院分区：
文献类型：
--
作者：
P. Hai;T. Masumoto;K. Shimizu
采用有限元法（FEM）和二维浅水方程建立了一个水动力学模型，该模型涵盖了从柬埔寨的克拉蒂到越南边境附近的湄公河洪泛区。该模型被应用到最近最大（2000年）和最小（2003年）洪水年的典型流量。模拟中引入了可能影响流态的研究区域的主要道路、堤坝、排水沟和道路开挖工程。采用阈值技术，在每一个时间增量中，将所有移动边界单元中具有薄水深的节点重置为干节点，以适应移动边界问题。将模拟结果与实测水位、流量进行比较，验证了模型的有效性。模拟结果产生了大量的流域水文数据，没有测量，这些数据可以用来评估流域管理对洪水和农业用水的影响。版权所有© 2008约翰威利父子有限公司。
A hydrodynamic model, which covers the floodplains of the Mekong River from Kratie in Cambodia to near the Vietnamese border, was developed using a finite element method (FEM) with 2D shallow‐water equations. The model was applied to typical flows of recent largest (2000) and smallest (2003) flood years. Main roads, dikes, colmatages, and road‐opening works in the study area, which may influence flow regimes, were introduced into the simulation. Moving boundary problems were accommodated by applying a threshold technique in which nodes having a thin water depth were reset to dry ones in all moving boundary elements at every time increment. Simulated results and available observed water levels and discharges were compared to validate the model. The simulated results produced a lot of hydrologic data for the basin areas, without gauging, and these data can be used to evaluate the effects of basin management on flooding and agricultural water use. Copyright © 2008 John Wiley & Sons, Ltd.