02746nam a2200265   450000500170000000800410001703500150005810000220007324500580009526000520015330000100020549000220021550001690023750200580040652016350046465000100209965000160210970000420212570000520216770000490221970000480226870000450231681000540236185600650241520260817172518.0070198         th                  eng    a.b101352611 aHuang, Tsong-shih10aCharacteristics of wave transformation in Da Nang bay  aBangkok :bAsian Institute of Technology,c1975  a88 p.1 aThesis ;vno. 742  aA thesis submitted for the partial fulfillment of the requirements  for the degree of Master of Engineering in the Asian Institute of Technology, Bangkok, Thailand.  aThesis (M.Eng.) - Asian Institute of Technology, 1975  aIn this study three hydraulic models were constructed to study the characteristics of waves propagating in Da Nang Bay and current variation in the vicinity of deep water terminal. From which the main source of the disturbance that caused the undesirable wave condition in the harbour area were determined. Succeedingly, appropriate means to attenuate wave condition in the harbour area were proposed. The first model was made to check the reflecting power of the rocky coastline north of Point Isabella. The results showed that MICHE's expressions were applicable to varying slope bottom even for  the case of oblique incidence, if equivalent bottom slope was defined and appropriate value of intrinsic reflection coefficient was given. The second model was built to study the characteristics of refracting wave around Ben-Dao-Tien-Sa headland. Then, the effective ness of several breakwater of various combinations of lengths, locations and orientations were tested. From the results, a design curve of effectiveness of breakwaters was presented for designing purpose. It was also indicated that the existing theoretical solution of diffraction process was applicable to practical engineering purpose, if the bottom topography property was properly determined.  The third model was made to check the effectiveness of the proposed breakwater on the current created by the river discharge in the vicinity of deep water terminal. It was observed that the current was not much changeo in most of the harbour area. The results, although not sufficient, provide a guide to assess the change of sediment deposition in the harbour area. 0aWaves 0aOcean waves1 aSuphat Vongvisessomjai, eChairperson1 aAckermann, Norbert L. , eExamination Committee1 aShi-igai, Hiroyoshi, eExamination Committee1 aNishimura, Hitoshi, eExamination Committee0 aPrida Thimakorn, eExamination Committee2 aAsian Institute of Technology.tThesis ;vno. 742  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B23996