Numerical modelling of the impact of sea level rise on large tidal inlet/basin systems

Pushpa Dissanayake, Harshinie Karunarathna, Roshanka Ranasinghe

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Abstract

The response of a large tidal inlet/basin system to Climate change driven sea level rise, in combination with local subsidence is simulated with two very different numerical modelling approaches: process-based and scale-aggregated. Delft3D (process-based) and ASMITA (scale-aggregated) models are used to simulate the morphological evolution of a schematised inlet/basin system representing the Ameland inlet in the Dutch Wadden Sea for a Relative Sea Level Rise scenario (RSLR) of 10 mm/year over a 25 year period. While the quantitative forecasts of the two models are different to each other, both models qualitatively indicate, over the 25 year simulation period, (a) a flood-dominant transport system which agrees with the contemporary measurements of the Ameland inlet, and (b) RSLR driven enhancement in the sediment transport. The ASMITA suggests stable tidal flats with an RSLR of 10 mm/year while the tidal flats diminished in the Delft3D.
Original languageEnglish
Title of host publicationIAHR 2015
Subtitle of host publication36th IAHR World Congress: Deltas of the Future (and what happens upstream)
EditorsArthur Mynett
Place of PublicationMadrid, Spain
PublisherIAHR
Number of pages9
ISBN (Electronic)978-90-824846-0-1
Publication statusPublished - 2015
Externally publishedYes
Event36th IAHR World Congress 2015 : Delta's of the future (and what hapens upstream) - World Forum, The Hague, Netherlands
Duration: 28 Jun 20153 Jul 2015
Conference number: 36

Conference

Conference36th IAHR World Congress 2015
CountryNetherlands
CityThe Hague
Period28/06/153/07/15

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