Bottom topography mapping of Pulau Duyong Besar, Kuala Terengganu using sonarlite echosounder

Abstract

This study is aimed to map out the subsurface of the estuary area near Pulau Duyong Besar using 'OHMEX Sonarlite Echo sounder'. The project is done by using the bathymetry concept and technique which is part of this study. The main objective of the study is determining the bottom topography of Pulau Duyong Besar and also to study and learn the technique of hydrograph survey. The survey was done on the 16111 February 2007 at around 3.30pm by using a small vessel During the survey, transect of the survey area was made by using the HydroPro software and almost cover all the survey area perfectly. The vessel managed to follow the transect and all the survey area was perfectly sounded using the Sonarlite. An area of approximately 922, 000m2 was covered. All the data then recorded in the laptop to processed later by using the SUFFER version 8.0 software to produce the subsurface map of the survey site. These surveys also point out that the technology use by this Echo sounder which use underwater laser beam is powerful enough to detect the seabed and enumerate the depth of that place. This enables faster and more accurate ground "trotting" and mapping become easy.