DOI: 10.1016/j.quascirev.2014.10.014
Scopus记录号: 2-s2.0-84930938742
论文题名: Beach ridge patterns in West Aceh, Indonesia, and their response to large earthquakes along the northern Sunda trench
作者: Monecke K. ; Templeton C.K. ; Finger W. ; Houston B. ; Luthi S. ; McAdoo B.G. ; Meilianda E. ; Storms J.E.A. ; Walstra D.-J. ; Amna R. ; Hood N. ; Karmanocky F.J. ; Nurjanah ; Rusydy I. ; Sudrajat S.U.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 113 起始页码: 159
结束页码: 170
语种: 英语
英文关键词: 2004 Indian Ocean tsunami
; Aceh (Indonesia)
; Beach ridge plain
; Coastal morphology
; December 2004 Sumatra-Andaman earthquake
; Paleoseismology
Scopus关键词: Earthquakes
; Geophysics
; Morphology
; Satellite imagery
; Sea level
; Sediments
; Subsidence
; Surveys
; Tsunamis
; Beach ridge
; Coastal morphology
; Indian Ocean Tsunami
; Indonesia
; Paleoseismology
; Sumatra-Andaman earthquake
; Beaches
; active margin
; automation
; beach morphology
; beach ridge
; coral
; coseismic process
; Indian Ocean tsunami 2004
; marsh
; paleoseismicity
; progradation
; radiocarbon dating
; reconstruction
; satellite imagery
; shoreline change
; spatial data
; spatiotemporal analysis
; subsidence
; Sumatra earthquake 2004
; topography
; uplift
; Aceh
; Indian Ocean
; Indonesia
; Java Trench
; Anthozoa
英文摘要: The morphology of beach ridge plains along active margins can be used to reconstruct coastal subsidence during large megathrust earthquakes. Here we use satellite imagery and automatic level surveys to reconstruct the build-up of a new beach ridge along a 10 km long stretch of the western Acehnese coast after the complete destruction of the beach during the great Sumatra -Andaman earthquake and successive tsunami in December 2004. The western Acehnese coast is characterized by ridge and swale topography reflecting the long-term progradation of the coastline. Radiocarbon dates obtained from marshy deposits in between ridges indicate an average progradation rate of 1.3-1.8 m per year over the last 1000 years. As a result of coseismic subsidence of 0.5-1 m and tsunami inundation in 2004, the most seaward beach ridge was destroyed and the coastline receded on average 110 m landward representing 65-85 years of average progradation. However, by 2006 a new 22 m wide ridge had formed. In the following years the coast prograded by an additional 30 m, but has not yet recovered to its pre-December 2004 position. In addition to the spatial data, topographic surveys conducted in 2009, 2012 and 2013 indicate that the crest of the newly formed beach ridge is 0.8-1.3 m higher than the crests of older beach ridges further inland. The source material for the new ridge is most likely sand transported seaward by the back flow of the 2004 tsunami and stored on the upper shoreface. In the months and years after the tsunami, this sediment is reworked by regular coastal processes and transported back to shore, leading to the reconstruction of a higher beach ridge in equilibrium with the vertical displacement of the coast and the resulting higher relative sea level. The preservation potential of the newly formed ridge depends on sediment availability within the coastal system to balance coastal profile adjustments due to rapid postseismic uplift. In Aceh, the preservation of seismically modified beach ridge morphology seems likely and another prominent ridge can be found in 640 m distance to the shoreline. It most likely formed in the aftermath of a previous megathrust earthquake and tsunami about 600 years ago matching sediment and coral records for this region. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59980
Appears in Collections: 过去全球变化的重建
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作者单位: Wellesley College, Wellesley, MA, United States; Swiss Agency for Development and Cooperation, Zurich, Switzerland; University of Pittsburgh, Johnstown, PA, United States; Delft University of Technology, Delft, Netherlands; Yale-NUS College, Singapore; Tsunami and Disaster Mitigation Research Center, Banda Aceh, Indonesia; Deltares, Delft, Netherlands; West Virginia University, Morgantown, WV, United States; Jakarta, Indonesia
Recommended Citation:
Monecke K.,Templeton C.K.,Finger W.,et al. Beach ridge patterns in West Aceh, Indonesia, and their response to large earthquakes along the northern Sunda trench[J]. Quaternary Science Reviews,2015-01-01,113