BEACH MORPHOLOGY AT BANDA ACEH, INDONESIA IN RESPONSE TO THE TSUNAMI ON 26 DECEMBER 2004

摘要

A study of morphological response and development of beaches which were affected by the earthquake and the tsunami on 26th December 2004 has been conducted at two selected coastal sections of Banda Aceh, Indonesia, A simplified principle adopted from one-line shoreline theory in a geospatial analysis utilizing identified shoreline features across the foreshore zone is applied,. The analysis yields a rough estimation of the shoreline and sediment volume changes since the tsunami After the severe impact as revealed by a significant chaotic shoreline retreat, the morphological development in the following 6 months has shown that about 15% of the total sediment loss due to the tsunami on the northwest coast has further been eroded, while 60% of that on the west coast has been compensated by accretion. This leads to a conclusion that different coastal characteristics show different responses to, and developments after the tsunami.