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035 _a.b10176524
099 9 _aAIT Thesis no. 346
100 1 _aHo, Siew Koon
245 1 0 _aCrenulate shaped bays
260 _aBangkok :
_bAsian Institute of Technology,
_c1971
300 _a100 p.
490 1 _aThesis ;
_vno. 346
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, 1971
520 _aWhere headlands are spaced along a sedimentary coast, the shoreline between the headlands will assume a crenulate shape if the most persistent or predominant waves have a resultant direction which is oblique to the headland alignment. Finally a shape is reached which is in equilibrium with the waves. This occurs when the incoming waves break simultaneously around the periphery and there is no further longshore drift. The eventual development of such an equilibrium shaped bay was studied by means of a model in which wave directions and heights were the sole variables. Thus the wave period, water depth, beach height and sedimentary material were the same throughout. The equilibrium shape of the bays, developed from an initially straight line to the fully stable state, was measured for various wave directions and heights. The curved portion of the shapes of the equilibrium coastline was then analysed by fitting the log-spiral curve. A typical prototype bay in fully developed condition, derived from investigations of hydrographic charts, was then analysed by computer to verify that diffraction and refraction combined to form the log spiral portion of the coastline.
650 0 _aCoast changes
700 1 _aShi-igai, Hiroyoshi,
_eChairperson
700 1 _aK. Edward,
_eExamination Committee
700 1 _aAckermann, Norbert L.,
_eExamintion Committee
700 1 _aArbhabhirama Anat,
_eExamination Committee
710 2 _a Asian Institute of Technology,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. 346
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B24443
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