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035 _a.b10108695
099 9 _aAIT Thesis no. 934
100 1 _aAbeysinghe, Jayampath P.
245 1 0 _aBeach plan formation between detached breakwaters
260 _aBangkok :
_bAsian Institute of Technology,
_c1979
300 _a85 p.
490 1 _aThesis ;
_vno. 934
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1979
520 _aWhen breakwaters are constructed offshore in sedimentary coastal area, shoreline will undergo a modification in shape, giving rise to protuberance in front of the breakwaters. Ultimately a shape is reached which is in equilibrium. This occurs when incoming waves break simultaneously around t he periphery, diminishing the longshore drift. The eventual development of such an equilibrium shaped shoreline under oblique wave attack was studied by means of a model in which wave length, periods and breakwater length were the sole variables. Thus the water depth, beach slope, wave direction, sedimentary material, gap between breakwaters and distance from shoreline to breakwater were maintained same throughout. The beach was first brought into equilibrium by running without breakwaters. Subsequently breakwaters were placed and chronological development of shoreline up· to equilibrium was measured. In addition current magnitudes and bottom topography were recorded. This whole procedure was repeated for different wave characteristics and different breakwater lengths. It was found that deposition increases with increasing wave energy. Further it was observed that shoreline indentation is heavily influenced by varying lengths of breakwaters.
650 0 _aShore-lines
650 0 _aBreakwaters
700 0 _aSuphat Vongvisesomjai,
_eChairperson
700 1 _aOverbeek, Henk Jen,
_eCo-Chairperson
700 0 _aPrida Thimakorn,
_eExamination Committee
710 2 _aGovernment of New Zealand, Scholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. 934
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22649
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