Study on the Effect of Coastal Forest to Tsunami Reduction

Abstract

海岸林を津波??災対策に活用させるため，本研究では海岸林の流体力学的影??による津波低減効果を定量的に評価・検討した．評価する際に重要となる樹林密度と胸??直径の関係は，入手できた現地観測結果から条件??定を行った．これを用い，海岸林の影??を考慮した数値??算を行い，津波の低減効果を定量的に評価・検討を行った．その結果，いくつかの津波と海岸林の条件による津波低減効果を定量的に検討することのできる表を示した．

In order to utilize coastal forest as tsunami countermeasures, quantitativeevaluation for hydrodynamic effect of coastal forest was examined in this paper.Relation between the forest density and the diameter of trunk is obtained through thefield measurement data of control forest and some previous researches, which is usefulinformation for the evaluation of effects. Numerical simulation including the model ofcontrol forest effect is performed for evaluating the quantitative effect for tsunamireduction and damage. By using simulation results, effects of reducing tsunamis can bequantitatively evaluated in a relation to the tsunami and forest conditions.