Forchheimer 포화항력모델을 이용한 투수성 호안의 해수교환량 모의

Abstract

In this study, FLOW-3D's Forchheimer's saturation drag model was used to physicallyreproduce the flow of infiltrating water in the body of the permeable seawall. This study confirmedthat Forchheimer's saturation drag model could be applied to the permeability evaluation of thesea wall. The flow patterns in the body were compared between the temporary seawall constructedusing only rubble stones and the back reinforced seawall in which the back part of the seawallwas reinforced with filter rocks and mats. The flow patterns in the temporary seawall body werewell-reproduced, in which the infiltration water moves from the open sea to the inside, and theflow accelerates as the stream tube shrinks. In the back-reinforced seawall, the flow pattern inwhich the seepage line of the body rises compared to the temporary seawall is well-reproduceddue to the low permeability of the filter mat. When the simulated results of the inland tidesurrounded by the seawall were compared with the observation data, the simulated and observedvalues showed a slight difference within 0.3m. At the T5 point, seawater exchange through theseawall was relatively as large as the temporary seawall installed. The simulation results reproducedthe phenomenon that the tidal wave occurred smaller than the T5 point because the seawaterexchange rate through the seawall was relatively low at the T6 point. After all, the back-reinforcedseawall was smaller. In addition, it reproduced the observation data in which the tide was delayed,and the duration of the ebb tide was superior to that of the flood tide.