03259nam a2200409 4500 20260818153730.0 310398 th eng .b11509624 AIT Thesis no. 1356 Perera, Don Franciscuge Mahinda Longshore circulation behind offshore breakwaters Bangkok : Asian Institute of Technology, 1979 47 p. Thesis ; no. 1356 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Eng.) - Asian Institute of Technology, 1979 The circulation of the net movement of water particles on a plane, immobile beach, is investigated experimentally in the absence and presence of a pair of breakwaters used to attenuate an oblique incoming wave train. The main causes for this circulation are firstly the rip currents developed behind the breakwaters due to the variation of breaker height along the breadline in particular, at some point behind the breakwater where the breaker height is minimum, This is the starting point of the rip current. Secondly, the tips of breakwaters act as sources of wave energy in producing currents and the breakwater modifies the incident wave to diffracted wave. The combined effect of the littoral current together with the effects of the breakwater gives rise to the circulation behind the breakwaters. For different wave heights and periods circulations are measured for two different pairs of breakwater, with the constant depth of water, the breakwater gap and the distance to the breakwater from the shoreline. The magnitudes of the measured currents and the computed mean currents which are predictable using the measured wave heights are of compatible order of magnitudes. The circulation pattern and the variation of the current along the circulation cell provide a useful vision for explaining the development of the tombolo behind the breakwater. Breakwaters Suphat Vongvisessomjai, Chairperson Overbeek, Henk Jen, Examination Committee Prida Thimakorn, Examination Committee The Government of the Netherlands, Scholarship Donor Asian Institute of Technology. Thesis ; no. 1356 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B22416 .b11509624 mnait - 250701 0 960619 m a - 0 mnait mnait mnarc 20 40 Barcode : 30050003026423 CREATED : 1995-01-20 RECORD # : i11785147 LPATRON : 1012277 LCHKIN : 2000-04-02 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 3 TOT RENEW : 0 Barcode : 30050160082169 CREATED : 2016-05-13 RECORD # : i12977482 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121028020 CREATED : 2022-10-18 RECORD # : i13408756 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 70630 70630 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 1356 30050003026423 2026-08-18 15:37:30 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. 1356 30050160082169 2026-08-18 15:37:30 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. 1356 30050121028020 2026-08-18 15:37:30 1 2026-08-18 20