REEF ISLANDS MORPHOLOGICAL EVOLUTION OF MAKASSAR: MITIGATION FOR ABRASION

This proposed three years research aims at finding the morphological and area changes of the eleven reef islands of Makassar, due to abrasion as well as identifying it causes as to support mitigation planning for abrasion. In this first year, this research was conducted from June to October 2013. The islands changes were calculated through ground truthing using GPS (Geographical Positioning System), which recorded the coordinate of the islands??? coast. Data recorded from GPS were then transfered to ArcGis, a Geograhic Information System (GIS) program. To identify the causes of abrasion and its historical process, participatory mapping was conducted to 25 key persons. Participatory mapping results showed that in general, island???s abrasion occured during West Monsoon, some of which sarted in the last 10 years. Alternately, the accredion process is occuring during the East Monsoon. Historically, the beginning of abrasion intensity varies over the islands. Calculation from ground truthing concluded that the islands changes over 8 to 12 years varies, from the least of 4,7% to the highest of 55,56%. The island with the least area losses is Lanyukang, while the biggest is Kodingareng Keke. In general, abrasion is occured in the west side of the island, except for Langkai and Kayangan which abrated more on the east side of their islands. Moreover, the islands of Samalona, Kodingareng Keke and Lumu-Lumu abrated in all sid