GIS Application and Remote Sensing for Monitoring the Changing of Coral Reefs in Belitung Regency

Abstract

Coral reefs are one of the most important and the most vulnerable marine ecosystem in the world. The coral reefs can be damaged, because of environmental factors and human activities, such as overfishing and polluted activities. Bangka Belitung islands are one of the provinces in Indonesia that have a huge potential of coral reefs, which are likely being damaged. This study aims to analyze the changing of coral reefs that occurred in the islands of tourist destinations in Belitung Regency from 2005 to 2018. This study used Landsat satellite imageries such as Landsat 5 TM for 2005, Landsat 7 ETM+ for 2011, and Landsat 8 OLI/TIRS for 2018. In this study, the changes of coral reefs will be determined by image data processing. Then, overlay methods are used to analyze the changes. In 2005, the coral reefs had an area of 4.68 km2, but in 2011, the coral reefs area changed to 2.45 km2. Then, in 2018, coral reefs have changed to 2.04 km2. In the year of 2005 and 2011, the area of coral reefs has decreased around 2.23 km2. While in 2011 and 2018, the area of coral reefs has decreased around 0.41 km2.