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
ID Code:253
Deposited On:06 Nov 2008 16:36
Last Modified:04 Aug 2015 10:54

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