Development of estuary morphology models
Development of estuary morphology models.
Huthnance, J.M.and Karunarathna , H. and Lane, A. and Manning, A.J. and Norton, P. and Reeve, D.E. and Soulsby, R.L. and Spearman, J. and Surendran, S. and Townend, I.H. and Wright, A.
In: 43rd Defra Flood and Coastal Management Conference, 1-3 July 2008, Manchester University. (2008)
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|Abstract:||Estuaries are key areas in UK flood risk and coastal erosion management, needing well-validated models to predict morphology. The Estuaries Research Programme (ERP) addresses the challenge of predicting longer-term morphological changes. Project FD2107(Defra/Agency, 2008) in ERP aimed to enhance “Hybrid” models combining elements and advantages of “top-down” and process-based “bottom-up” approaches. Developments include:
• An Analytical Emulator, based on 1-D hydrodynamics in a schematised estuary, indicating total area/volume response to water levels and tidal range;
• A Hybrid Regime model, combining 1-D hydrodynamics with regime relations between discharge, cross-section area and width which evolve for changed conditions;
• Morpho-SandTrack, with 2-D hydrodynamics, sediment dynamics, particle-tracking to change morphology; flow is re-calculated as bathymetry evolves;
• A Realignment model, with 2-D flow and waves to spread sediment and predict local changes in morphology and saltmarsh due to managed realignment;
• ASMITA (pre-existing) programmed in Matlab; sediment enters accommodation space, evolving the size of aggregated intertidal areas and channels;
• An Inverse model evolving depth in 2-D according to a diffusion equation plus “source” derived from past depth changes.
|Item Type:||Conference or Workshop Item (Paper)|
|Subjects:||Coasts > Coastal erosion and flooding|
Floods > General
Maritime > Estuary management
Coasts > General
|Deposited On:||06 Nov 2008 16:36|
|Last Modified:||04 Aug 2015 10:54|
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