03477nam a2200445 4500 20260818213433.0 150698 th eng .b10588668 AIT Thesis no. WA-91-15 Parvez, Shah Nawshad Scour in front of a seawall Bangkok : Asian Institute of Technology, 1991 78 p. Thesis ; no. WA-91-15 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1991 When a structure is placed on an erodible bed and is subjected to a current or wave field, scour will most likely occur around the structure. It is very difficult to predict this scour, because the scouring process is more complicated than the normal transport process. Both erosion and sedimentation processes are involved in the movement and transportation of sediment on the seabed which is mainly due to the wave action. Three different types of structures, namely, vertical, inclined and stepped face seawall were tested in this study for comparative study of scour in front of them. An attempt is made to determine the beach profile response due to the presence of various types of structures placed at various positions in response to normally incident wave attack. Throughout the experiments the water depth, beach slope and wave direction were kept constant. It is found from the laboratory experiments that extensive scour occur at the toe of vertical type seawall, minimum scour occur at the toe of stepped face seawall. Further it was observed that storm wave with high wave steepness erode the sandy beach and accumulate in the offshore zone causing shoreline retrogression. It was also found that scour depth is directly related to run up height, reflection coefficient, wave steepness, sand size and above all characteristics of waves. Sea-walls Scour (Hydraulic engineering) Suphat Vongvisessomjai, Chairperson Tawatchai Tingsanchali, Examination Committee Shibayama, Tomoya, Examination Committee The Government of Canada (CIDA), Scholarship Donor Asian Institute of Technology. Thesis ; no. WA-91-15 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B17756 .b10588668 mnait s 240410 2 951012 m a s 0 mnait mnait mnait mnarc 20 40 Barcode : 30050003054771 CREATED : 1994-05-18 RECORD # : i1074521x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003054789 CREATED : 1994-05-18 RECORD # : i10745221 LPATRON : 1010873 LCHKIN : 2000-09-10 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 3 TOT RENEW : 0 Barcode : 30050160033485 CREATED : 2016-02-15 RECORD # : i12882070 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121028301 CREATED : 2022-10-18 RECORD # : i13408380 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 104707 104707 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. WA-91-15 30050003054771 2026-08-18 21:34:33 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. WA-91-15 30050003054789 2026-08-18 21:34:33 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. WA-91-15 30050160033485 2026-08-18 21:34:33 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. WA-91-15 30050121028301 2026-08-18 21:34:33 3 2026-08-18 20