Modelling Complex Terrain of Reef Geomorphological Structures in Harapan-kelapa Island, Kepulauan Seribu

Abstract

Detail and accurate information on reef geomorphology structure feature as one significant factor for ecosystem based management of coastal and small islands resources. Most applications of remote sensing and GIS in coral reef studies were directed to map reef substratum and coverage of benthic habitats. The objective of this study was to analyze bathymetric dataset in order to classify reef geomorphology structure in Harapan-Kelapa Island, Kepulauan Seribu. Bathymetric data-set applied were, collated from WorldView-2 satellite and single-beam acoustic remote sensing using Mapsounder 585, examined using ArcGIS®, Benthic Terrain Modeler (BTM) to classify seabed environment into several geomorphology classes. Stepwise calculations of broad and fine Bathymetric Position Index (BPI) were applied into each grid, surficial characteristics of the seabed were analyzed according to several sets of scale-factor, and finally structures of the seabed were classified into 13 geomorphic classes.