000			03209nam a2200409 4500
005			20260818213932.0
008			050698 th eng
035			_a.b10600371
099		9	_aAIT Thesis no. WA-88-16
100	1		_aSrinivasan, Kanapathipillai
245	1	0	_aShoreline stabilization by offshore breakwater and groin
260			_aBangkok : _bAsian Institute of Technology, _c1988
300			_a64 p.
490	1		_aThesis ; _vno. WA-88-16
500			_aA thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1988
520			_aConstruction of offshore breakwater and groin will modify the shoreline and finally it will reach an equilibrium state for a given wave characteristics. Offshore breakwater is very effective in stabilizing the shoreline when incoming wave steepness is rather small, but it is not functioning well when the storm attack the beach. Most of the earlier tests are for small wave steepness. Stabilitation of beaches under the oblique wave attack has been studied in a small wave basin in which wavelengths, periods and positions of t he breakwater are variable . Groins and breakwaters used as coastal structures are tested for severe incoming waves. Throughout the experiment the water depth, beach slope, wave direction and sediment size of beach are kept constant. It is found on the study that the changes of bottom topography in the presence of coastal structures very high near to t he shoreline and less in the deeper water. Further it was observed that the development of tombola largely influenced by the position of breakwater. Extensive scouring occurred between the breakwater gaps and the size of tombolo increased with the increase in wave height. The comparison of experimental results with numerical results show good agreement for the beach deformation in the presence of groins.
650		0	_aBreakwaters
700	0		_aSuphat Vongvisessomjai, _eChairperson
700	0		_aPreecha Kamronrithisorn, _eCo-Chairperson
700	0		_aTawatchai Tingsanchali, _eExamination Committee
710	2		_aThe Royal Norwegian Government- NORAD, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WA-88-16
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18864
907			_a.b10600371 _bmnait _cs
902			_a240410
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