| Author | Nguyen Thi Hien |
| Call Number | AIT Thesis no.WM-16-02 |
| Subject(s) | Climatic change--Thailand, Gulf of--Analysis
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-16-02 |
| Abstract | Climate change is generating more effects on stochastic climate parameters from temperature, rainfall, sunlight to wind, wave and currents. The coastal areas, hence, is becoming a critical environment under extreme climate change context where have been experienced higher frequency of extreme waves recently. Meanwhile, severe erosion and deposition changes recorded due to fluctuation of wave climate from the past to present but still less specific program is built to project extreme wave conditions and sediment transport in the future, especially in the Gulf of Thailand. The study, therefore, analyzed extreme wave characteristics along the Gulf of Thailand at the six deep-water locations including Upper Gulf with shallow water areas near Petchaburi, critical economic regions near Chumphon, Cambodia and 2neighbor stations of Vietnam and Malaysia, then, Botru as the locations at Lower Gulf. The analysis has done with programing on Matlab environment for 6 hourly wave data including 3 time slices which are present days (1981-2011-NCEP data), near future (2041-2060) and far future (2081-2100) extracting from ECHAM 5 and GFDL CM2.1wind forcing results. Six wave parameters have been assessed from duration, frequency, and significant wave height of extreme events, 99thpercentile wave height as threshold, wave direction and designed wave height. The temporal and spatial wave analysis shows an increase trend of 99thpercentile wave height and 1% wave height with Northeast dominated coming wave direction atmost of location from present to future. In addition, the number of extreme events with longer duration, higher intensity goes up to 3-4 storm/year in future. Then, the designed wave height at those stations at different time slices and GCMs corresponding to different return period was calculated by fitting with Generalized Extreme Value Distribution via programing. The results indicate an increase trend about 1 m –2 m over all stations throughout the years with arrange of around 5 m at the Lower Gulf and 3.5 m –4 m in the Upper stations in future with different return period. Finally, the sediment transport at Botru was examined by MIKE 21 ST during those mean extreme events and 20 years return period event from present to future days. The morphology results at Botru bank, witnessed considerable changes from present to future while the bed level decrease at the South parts and the 6 m depth. The erosion and deposition locations are then seen at the South and the North, respectively. Last but not least, the bed level during 20 year return period event could change 80 cm –1 m for the whole region from present to future with great accretion at the North of the bank and bar occurring at 310 m -330 m from the shoreline in near and far future. |
| Year | 2016 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-16-02 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Sutat Weesakul |
| Examination Committee(s) | Babel, Mukand Singh;Shrestha, Sangam;Somchai Chonwattana |
| Scholarship Donor(s) | Deutscher Akademischer Austausch Dienst (DAAD) Germany |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2016 |