| Title | The impact analysis of coastal and harbor structure on extreme waves (2/3) |
| Dept | Transportation Technology Research Center |
| Year | 2016 |
| Month | 3 |
| Price | |
| Summary | In order to develop and promote scientific technologies for disaster prevention, disaster reduction, and coastal-harbor engineering, we will investigate, evaluate, and consult problems of coastal structures impacted by extreme sea states. The purpose of this study is to mitigate damage due to climate change in the future.
Recently, frequent disasters caused by extreme weather have become more common, and future harbor structures may be threatened by more extreme weather conditions. Therefore, the present study was carried out to investigate the force situation of harbor structures under historical extreme waves and extreme waves that may occur in the near future with climate change. Last year, the wave-current around the Port of Taichung was simulated by NearCoM model, and the wave forces on the breakwater and the stability of the breakwater have been calculated by COBRAS model. In this year, we applied the NearCoM model to simulate the wave-current around the Port of Taichung under four kinds of climate change conditions, which are RCP2.6、RCP4.5、RCP6.0、RCP8.5 defined by IPCC AR5(2013). Second, the temporal variation of wave forces on the breakwater and the stability of the breakwater will be obtained by COBRAS model. Additionally, the drift simulation will be verified by field data. Finally, we hope the results can be used in the decision making of the harbor companies when a breakwater will be built. Wave and current fields in the Taichung harbor area were simulated under four kinds of climate change conditions and different initial Typhoon waves. The simulation results showed that the Northern typhoon wave is more important than other directional typhoon waves for force analysis. The Western typhoon will cause instability in the Taichung harbor. We obtained validation results of current in calculation and observation by drifter simulation. The elevation, velocity, and pressure distribution to characterize wave field, analyze force variation on structure, and apply overtopping calculation under four kinds of climate change conditions have been calculated. The project is executed at the first year as follows: establishing the inspecting procedure and evaluating standard, drawing up an appropriate report, which contains wave-structure interaction on extreme waves. Finally the study achievements would provide ports and other authorities with an appropriate assessment and evaluating strategy of harbor stability analysis. |
| Post date | 2016/05/06 |
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