Analisa Perubahan Garis Pantai Akibat Gempa Dan Tsunami Di Pesisir Meulaboh, Nanggroe Aceh Darussalam

Research on the coastline changes due to Aceh earthquake and tsunami was carried out at Meulaboh Coastal, Nanggroe Aceh Darussalam on June 2006. Tectonics earthquake occurred on December 26th, 2004 centered in Indonesian ocean with 9.0 magnitude scale power caused a great tsunami. The objectives of this research were to find out the coastline changes changes and the effect of normal wave energy and tsunami wave to the coastline changes. The coastal changes showed by Landsat satellite ETM7+ from 2001, 2003 and 2005. The effect of normal wave energy and tsunami wave to the coastline changes studied base on wave measurements which measured by wave recorder Sontek Argonaut Firmware version 11,0 for 6 x 24 hours. The result showed that there were difference between the normal wave energy (the highest – the lowest) every year and the tsunami wave energy. Comparison both of them is 1:127 and ratio of loss area before and after the tsunami is 1:11. Abrasion area changes in 2001-2003 amounted to 38.915,53 m2 with an 841,895 m reduction in length of coastline and 434.773,75 m2 in 2003-2005 with a 1669,791 m reduction in the length of coastline. According of the study tsunami wave energy gives huge effect to changes in the coastline. Oseana. Vol. XXXVIII (1): 63-74.2013