Tsunami hazard mitigation by mangrove forests experiment on hydrodynamic coefficients

• Main Author: Yao, Yao.
• Other Authors: Huang Zhenhua
• Format: Final Year Project
• Language: English
• Published: 2010
• Subjects: DRNTU::Engineering::Environmental engineering::Environmental protection
• Online Access: http://hdl.handle.net/10356/39454
• Institution: Nanyang Technological University

The purpose of this final year project is to study how the different porous mangrove forest can reduce the tsunami waves on a certain slope. The solitary waves are chosen to study in a long wave flume, since it is the leading wave in the tsunami. The tendency of the transmitted waves, wave energy, inundation and run up change on the certain slope changes when the solitary waves are passing through the mangrove models with different porosity with respect to different target wave heights were studied in the report. The prediction of the tsunami wave behavior and reduction of the tsunami waves by mangrove forests or man-made structures are studied by the numerical simulations, and there is no experimental data to evaluate the results. The results are prepared for the numerical simulation to quantify the drag coefficient caused by the mangrove on the slope. In this report, the mitigation of solitary waves, which is the leading wave of tsunami, by mangrove forest on slope will be discussed. Due the time constrain, the water depth of 15cm and slope with 1: 6.88 will be only discussed for all the cases. The studied target wave heights included were from 2cm to 6cm due to the limitation of the water depth. Three mangrove forest models with different porosity were discussed here. The reduction of water height, energy, inundation and runup will be studied according to different porosity of mangrove model with respect to different target wave heights.