Ella Meilianda, Franck Lavigne, Biswajeet Pradhan, Patrick Wassmer, Darusman Darusman, Marjolein Dohmen-Janssen
Barrier islands are indicators of coastal resilience. Previous studies have proven that barrier islands are surprisingly resilient to extreme storm events. At present, little is known about barrier systems’ resilience to seismic events triggering tsunamis, co-seismic subsidence, and liquefaction. The objective of this study is, therefore, to investigate the morphological resilience of the barrier islands in responding to those secondary effects of seismic activity of the Sumatra–Andaman subduction zone and the Great Sumatran Fault system. Spatial analysis in Geographical Information Systems (GIS) was utilized to detect shoreline changes from the multi-source datasets of centennial time scale, including old topographic maps and satellite images from 1898 until 2017. Additionally, the earthquake and tsunami records and established conceptual models of storm effects to barrier systems, are corroborated to support possible forcing factors analysis. Two selected coastal sections possess different geomorphic settings are investigated: (1) Lambadeuk, the coast overlying the Sumatran Fault system, (2) Kuala Gigieng, located in between two segments of the Sumatran Fault System. Seven consecutive pairs of comparable old topographic maps and satellite images reveal remarkable morphological changes in the form of breaching, landward migrating, sinking, and complete disappearing in different periods of observation. While semi-protected embayed Lambadeuk is not resilient to repeated co-seismic land subsidence, the wave-dominated Kuala Gigieng coast is not resilient to the combination of tsunami and liquefaction events. The megatsunami triggered by the 2004 earthquake led to irreversible changes in the barrier islands on both coasts. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Tsunami and Disaster Mitigation Research Center (TDMRC), Universitas Syiah Kuala, Banda Aceh, 23233, Indonesia; Civil Engineering Department, Engineering Faculty, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Geography Department, University of Paris 1 Panthéon-Sorbonne, Paris, 75005, France; Laboratoire de Geographie Physique, UMR 8591 CNRS, 1 Place A. Briand, Meudon, 92190, France; Centre for Advanced Modelling and Geospatial Information Systems (CAMGIS), University of Technology Sydney, Ultimo, 2007, NSW, Australia; Center of Excellence for Climate Change Research, King Abdulaziz University, P.O. Box 80234, Jeddah, 21589, Saudi Arabia; Earth Observation Center, Institute of Climate Change, Universiti Kebangsaan Malaysia,UKM, Bangi, Selangor, 43600, Malaysia; Post-Graduate School, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Water Engineering & Management (WEM), Faculty of Engineering & Technology, University of Twente, Enschede, 7522 NB, Netherlands
Research at a Glance
Register to unlock
Topics & SDG Alignment
Register to unlock
Collaboration
Register to unlock
Author Profile (Selected)
Register to unlock
References Overview
Register to unlock
Journal & Source
Register to unlock
Metadata & Integrity
Register to unlock