APPLICATION OF A NESTED APPROACH TO A FLOODING SIMULATION WITH NON-RECTANGULAR DOMAIN

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  • 洪水氾濫解析における非矩形領域ネスティング計算法の適用

Abstract

<p> We examined applicabilities of a nested approach to flood simulations with non-rectangular domain. In the case of rectangular domain, setting of nested domain has difficulties because of locations of land elevations and rivers. To solve the problem, nested calculation approach with non-rectangular domain which was applied for unstructured flood model was adopted. Gaibandha District which is located in north part of Bangladesh was selected for our study area, and Udakhali union was selected for the nested calculation area. We used observed water levels, and 121 days calculation was conducted. As a result, we confirmed that there is no serious influences to simulation results due to the difference of nested domains. Also, we were able to save the calculation load with the setting of the un-rectangular domain.</p>

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