Aplikasi instrumen Multibeam sonar dalam kegiatan peletakan pipa bawah laut (contoh studi perairan balongan)

Abstract

In this time government tries to solve the problems of oil and gas transportation from drilling area to processing area. This problems related with time and money. For that reason, the solution of this problems have to found immediately. The purpose of this research is to get under water topography information, sediment classification and also to make under water pipeline route. Survey held in Balongan, Indramayu, West Java. Data acquisition done by using hydrostar software. Bathymetry data was processed with Caris HIPS&SIPS. Amplitude data was processed with MB-Systems this data was used to make underwater sediment classification. Depth in study area arrange from 11.5 m – 22.5 m. According to the rules of DNV-OS-F101 Submarine Pipelines Systems 2007 under water pipeline route is the right side from sounding route in 108.39 E, 6.36 S, until 108.62 E, 6.36 S, with bathymetry slope 1.5 m between area 2 and 3 also 1 m in area 3. The center region from sounding route has plain bathymetry slope but pipeline construction can not be placed because another pipeline has placed there. The type of underwater sediment gotten by processing amplitude data and core sample sediment. Then the amplitude data interpolated with Gaussian method to get underwater sediment classification. Sediment in the pipeline route dominated with clayey silt type,then silty clay type, and the last is silt type.