EXPERIMENTAL STUDY OF MANGROVE EFFECTS ON COASTAL PROTECTION

Che-Wei Chang,Kojiro Suzuki,Naoki Tsuruta,Hideaki Yanagisawa,Nobuhito Mori

doi:10.9753/icce.v36v.management.12

Abstract

Mangrove forests, featured by the complex root system, were found effective among natural-based solutions in coastal disaster reduction (e.g. Guannel et al. 2016). The prop roots of mangroves have been deemed useful in attenuating waves and were addressed in several recent experimental works using artificial tree models (e.g. Maza et al. 2019). In this study, laboratory experiments were conducted on both model scale and prototype scale using more realistic models. We aim to provide a comprehensive investigation of wave-induced forces exerted on mangroves and propose proper relationships of force coefficients with flow parameters under various incident conditions.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/b59ewNY7mSI

Highlights

Mangrove forests, featured by the complex root system, were found effective among natural-based solutions in coastal disaster reduction (e.g. Guannel et al 2016)
DATA ANALYSIS AND RESULTS Based on the Morison-type equation, the drag and inertia coefficients were firstly estimated from the experimental data
It was observed that inertia forces were not negligible even for longer periodic waves

Summary

Introduction

Mangrove forests, featured by the complex root system, were found effective among natural-based solutions in coastal disaster reduction (e.g. Guannel et al 2016). The prop roots of mangroves have been deemed useful in attenuating waves and were addressed in several recent experimental works using artificial tree models (e.g. Maza et al 2019). Laboratory experiments were conducted on both model scale and prototype scale using more realistic models. We aim to provide a comprehensive investigation of wave-induced forces exerted on mangroves and propose proper relationships of force coefficients with flow parameters under various incident conditions. The correlation between the model scale and the prototype scale, which is unsolved but essential for future model developments and practical applications, is discussed in this work

Objectives

Methods

Results