洪水氾濫解析における非構造格子を用いたネスティング計算法の適用

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  • APPLICATION OF A NESTED APPROACH TO A FLOODING SIMULATION USING UNSTRUCTURED GRIDS
  • コウズイ ハンラン カイセキ ニ オケル ヒコウゾウ ゴウシ オ モチイタ ネスティング ケイサンホウ ノ テキヨウ

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 We examined the methods of the nested flood simulation model using unstructured grids. Water depth and discharge were used for connection of nesting calculation, and these results were compared with the reference calculation that did not employ the nested calculation. In order to compare the result with the previous studies, we performed flooding calculation with structure-unstructured grids nesting and unstructured-unstructured grids nesting, and they were applied to an uneven terrain of the Jamuna River basin in Bangladesh. As a result, nested calculation using water depth showed good agreement with the reference calculation, and result with discharge showed over estimation. For the further research, applicability of these methods should be confirmed in the cases where high flow velocity is observed.

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