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Completed
Analysis of the effects of transgression surface morphology on coastal evolution during sea-level rise using numerical modelling.
FunderNetherlands Organisation for Scientific Research (NWO)
Duration15 Aug 2005 - 27 Jan 2006
Project codeS 77-201
Open Access mandatePublications: NoResearch data: No
Identifiers
Project timeline100%
Description
A three months research project is proposed to systematically evaluate the influence of antecedent transgression surface morphology on a landward migrating barrier island-lagoon coastal system (c.f. Wadden Sea) under conditions of sea level rise. Sea-level rise has played an important role in the development of many coastal areas during the past 19.000 years. A rising sea level forces the barrier island and lagoon to migrate landwards, thereby inundating nearby coastal areas. The width and depth of the lagoon is a prone variable in the behaviour of landward migrating barrier systems as it captures sediment from the beach and shoreface. Many field studies have described transgressive barrier systems. They reveal a wide range of coastal behaviour as response to local conditions such as wave climate, tidal regime, sediment properties, transgression surface morphology, etc. The variability in local conditions makes it difficult to extract generic behaviour form the field data. Using numerical modelling as a research tool, the effects of local coastal plain morphology on a transgressive barrier-lagoon system can be systematically evaluated for various wave and tide conditions. Two forward numerical models are particularly well suited to study transgressive barrier islands. These are the Shoreface Translation Model (developed by Dr. Peter Cowell at the University of Sydney) and BarSim (developed by the applicant at the Delft University of Technology). Both models have been successfully used to simulate barrier island transgression under conditions of sea level rise for a small number of case studies, but no systematic evaluation of the influence of antecedent transgression surface morphology has yet been conducted. Dr. Cowell?s expertise on modelling barrier transgression is therefore of great importance for understanding transgressive barrier island systems for both past as well as for expect future sea level rise.
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A three months research project is proposed to systematically evaluate the influence of antecedent transgression surface morphology on a landward migrating barrier island-lagoon coastal system (c.f. Wadden Sea) under conditions of sea level rise. Sea-level rise has played an important role in the development of many coastal areas during the past 19.000 years. A rising sea level forces the barrier island and lagoon to migrate landwards, thereby inundating nearby coastal areas. The width and depth of the lagoon is a prone variable in the behaviour of landward migrating barrier systems as it captures sediment from the beach and shoreface. Many field studies have described transgressive barrier systems. They reveal a wide range of coastal behaviour as response to local conditions such as wave climate, tidal regime, sediment properties, transgression surface morphology, etc. The variability in local conditions makes it difficult to extract generic behaviour form the field data. Using numerical modelling as a research tool, the effects of local coastal plain morphology on a transgressive barrier-lagoon system can be systematically evaluated for various wave and tide conditions. Two forward numerical models are particularly well suited to study transgressive barrier islands. These are the Shoreface Translation Model (developed by Dr. Peter Cowell at the University of Sydney) and BarSim (developed by the applicant at the Delft University of Technology). Both models have been successfully used to simulate barrier island transgression under conditions of sea level rise for a small number of case studies, but no systematic evaluation of the influence of antecedent transgression surface morphology has yet been conducted. Dr. Cowell?s expertise on modelling barrier transgression is therefore of great importance for understanding transgressive barrier island systems for both past as well as for expect future sea level rise.
