Seabed Classification Using Multibeam Backscatter in G-Island, North Jakarta

Abstract

The use of data, including bathymetry and backscatter intensity, collected using multibeam echosounder (MBES) systems to characterize seabed types was evaluated in the G-Island sea, North Jakarta. A multibeam echosounder survey using Kongsberg EM 2040 with the frequency of 300 kHz was done in October 31th-November 5 th 2016. Ground-truth data in the form of grab samples were collected at 7 stations and were analyzed for grain size. Factor analysis of grain size and acoustic data identified two sedimentary types: coarse sand and very fine sand. A map of seabed classification was produced through a combination of information derived from backscatter data and morphological features derived from multibeam bathymetry, which were validated by ground-truth data.