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Title
Japanese:Projection of coastal floods in 2050 Jakarta 
English:Projection of coastal floods in 2050 Jakarta 
Author
Japanese: Hiroshi Takagi, Miguel Esteban, Takahito Mikami, Daisuke Fujii.  
English: Hiroshi Takagi, Miguel Esteban, Takahito Mikami, Daisuke Fujii.  
Language English 
Journal/Book name
Japanese:Urban Climate 
English:Urban Climate 
Volume, Number, Page Vol. 17        pp. 135-145
Published date July 2016 
Publisher
Japanese:Elsevier 
English:Elsevier 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://www.sciencedirect.com/science/article/pii/S2212095516300281
 
DOI https://doi.org/10.1016/j.uclim.2016.05.003
Abstract The present work projects the extent of coastal floods by the year 2050 in Jakarta, one of the fastest growing megacities in the world, using a coastal hydrodynamic model that considers abnormal high tides, sea-level rise, and land subsidence. The tidal constituents were adjusted in a manner to reproduce the observed tidal record during the extensive coastal floods that took place on November 2007, when it is likely that a La Niña event, the 18.6 year lunar nodal high-tide cycle, and other abnormal tide mechanisms took place simultaneously. The simulations demonstrate that by the middle of this century extensive floods could potentially reach several kilometers inland in Jakarta. Land subsidence is clearly one of the major challenges facing the city, as considering only the influence of sea-level rise indicates that such floods may be limited to within a few hundred meters of the coastline. From 2000 to 2050 the potential flood extent is estimated to increase by 110.5 km2. Land subsidence is responsible for 88% of this increase. The results also indicate that the rate of flood area expansion in the 2025–2050 period would be 3.4 times faster than during the 2000–2025 period, demonstrating a non-linear increase in flood risk with the passage of time. Keywords Jakarta; Coastal flood; Land subsidence; Sea-level rise; Oceanic tide; Urbanization; Abnormal high tides; ENSO; 18.6-year lunar nodal cycle Highlights •Future coastal flooding in Jakarta was projected through a coastal hydrodynamic model. •The model took into account land subsidence, SLR, and abnormal high tide. •From 2000 to 2050 the potential flood extent is estimated to increase by 110.5 km2. •Land subsidence is responsible for 88% of this increase. •The extent of flood areas will exponentially increase with the passage of time.

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