EXPERIMENTAL STUDY FOR EFFECT OF A COMBINED POSITION OF COASTAL FOREST AND EMBANKMENT ON TSUNAMI FLOW PATTERN AND FLUID FORCE ACTING ON TREE

Abstract

 For tsunami mitigation, suitable arrangement of multiple tsunami measure structures is very important. The objective of this study is to estimate effect of a combined position of coastal forest and embankment on tsunami flow pattern and fluid force acting on tree by the hydraulic model experiment.
 When the coastal forest is in the lower stream side of the coastal embankment, the fluid force acting on trees becomes large, and the coastal forest is expected as resistance to tsunami. However, when a coastal forest and an embankment are near, there is a risk of trees breakage in the front face of a forest.