Study of Coastal Morphological Changes by Tsunamis in Aceh (Indonesia) Using Satellite Images
Study of Coastal Morphological Changes by Tsunamis in Aceh (Indonesia) Using Satellite Images
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DOI：
10.25299/jgeet.2023.8.4.12757
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发表时间：
2023-12
期刊：
影响因子：
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通讯作者：
Ziadul Faiez;Daidu Fan
中科院分区：
文献类型：
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作者：
Ziadul Faiez;Daidu Fan
本研究确定了发生在班达亚齐、兰普克-洛肯加和梅拉博的海啸造成的海岸形态变化。2004年、2005年、2010年和2012年海啸发生后，研究区形态发生了剧烈变化。采用DSAS （Digital Shoreline Analysis System）分析方法，对1988-2020年期间的Landsat卫星影像和潮汐数据进行时序分析。本研究的主要目的是监测2004年海啸前后15年海岸形态的恢复、趋势发展和控制因素。2004-2005年期间，班达亚齐的海岸线移动呈现内陆后退趋势，平均NSM（净海岸线移动）值为-644.69 m。2005-2020年期间的EPR（终点速率）值达到21.31 m/年，但2020年海岸线位置的恢复并未恢复到2004年海啸前的原始位置。在2004-2005年期间，兰浦和龙加海滩发生了明显的海岸线退缩和土地流失，平均NSM值为-40.59 m。2020年兰浦海滩的海岸线经历了一次增生恢复。然而，洛肯加海滩仍在经历明显的侵蚀。梅拉堡东岸的恢复速度很快，砂吐地貌的年生长发育证明了这一点。海岸形态变化受自然和人为过程复杂的相互作用影响。2004年的海啸是改变研究区海岸形态的主要因素。
This study identified the coastal morphological changes caused by tsunamis that occurred in Banda Aceh, Lampuuk-Lhoknga, and Meulaboh. The morphology of study areas was drastic changes during the 2004 tsunami and followed by the 2005, 2010, and 2012 tsunamis. Time series of Landsat satellite images and tidal data were collected during the period 1988-2020 and analyzed using DSAS (Digital Shoreline Analysis System) analysis method. The main aim of this study is to monitor recovery, trend development, and controlling factors of the coastal morphology before and after fifteen years of the 2004 tsunami. In Banda Aceh, the shoreline shift in the 2004-2005 period shows an inland retreat trend, with an average NSM (net shoreline movement) value of -644.69 m. The EPR (end point rate) value for the 2005-2020 period reached 21.31 m/year, but the recovery of the 2020 shoreline position has not returned to the original position before the 2004 tsunami. The significant shoreline retreat and land loss with an average NSM value of -40.59 m in the period 2004-2005 occurred on the Lampuuk and Lhoknga beaches. The 2020 shoreline of Lampuuk beach underwent a recovery with accretion. Nevertheless, Lhoknga beach is still experiencing apparent erosion. The recovery of the Meulaboh east coast was fast as evidenced by the development of the annual growth of spit features. The coastal morphological changes are influenced by complex interactions between natural and anthropogenic processes. The 2004 tsunami was the major factor to change the coastal morphology in the study areas.