02488nas|a2200253 a 450000500170000000800410001703500150005810000170007324500810009026000670017130000220023849000270026050001440028750200580043152013570048965000380184670000320188470000420191670000430195870000430200171000650204481000590210985600660216820260817172528.0080326s2006    th uu|m rtt   0|  a1eng d  a.b119060171 aAlam, Saidul10aCharacterization of recent tsunami deposits at the Andaman coast of Thailand  aPathum Thani, Thailand :bAsian Institute of Technology,c2006  a50 leaves :bill.1 aThesis ;vno. GE-05-07  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 2005  aThis thesis deals with the study of recent tsunami sediments of the December 26, 2004 tsunami event at an undisturbed 1600m x 630m large coastal plain at Bang Lut Beach in the Pang Nga Province of Thailand. The field work included reconnaissance of more than 30 km of coastline and coastal plains to select this appropriate location, a topographic survey, an assessment of beach erosion and the sedimentological characterization of the in situ deposits in 77 trenches. The laboratory work comprised of sieve analyses and processing of images taken under the microscope. It was found out that the tsunami sand sheets' average thickness is 7.8 cm and the volume is 49.14 m3/m of coastline. The eroded beach sand volume is a fraction of the total deposit volume. The deposit thickness' is influenced by the local topography and the distance from the shoreline. The deposits fine inland and show the general tendency to fine upward in the sediment column. Alternating fine-coarse sand layers at nearshore locations as well as normal grading patterns in the sediments further inland indicate four major hydrodynamic regimes during deposition. The detected bi-modality in grain size distribution suggests a dual-source of the deposits. The results on the aspect ratio analyses of grains indicate that more elongated particles were transported further inland. 0aTsunamiszThailandzAndaman Coast1 aGlawe, Ulrich eChairperson1 aPham Huy Giao,eExamination Committee1 aDutta, Joydeep,eExamination Committee1 aHonda, Kiyoshi,eExamination Committee2 aAsian Institute of Technology Fellowship eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. GE-05-07  3Full-Textu http://203.159.5.9/ait-thesis/detail.php?q=B11742