Abstract
The long-term morphodynamic response of the Clyde Estuary to any possible change in environmental forcing associated with global climate change and human interference is examined here using a model based on a systems approach. The model, which uses Boolean Algebra as its formal mathematical language, provides a qualitative insight into the long term morphodynamic behaviour of the estuarine system, at this level without the need for detailed and quantitative hydrodynamic and morphodynamic process knowledge or extensive data resources. The model predictions suggest that the long-term morphological changes in the Clyde Estuary largely depend on the fluvial flow of the River Clyde. Salt marshes in the upper reaches of the estuary were found to be the most vulnerable morphological feature of the estuary. In the event of increased river flow in the future, a likely situation according to climate change scenarios, saltmarshes will deplete or disappear altogether, irrespective of the sediment influx into the estuary. Changes to waves and tides will also contribute to the evolution by taking the estuary through significantly different intermediate morphological states whilst evolving towards a stable end state.
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References
ABP Marine Environmental Research Limited (2005) ESTSIM Behavioural Statements Report FD2117, Project Report 2 (PR2)
Allen JRL, Duffy MJ (1998) Medium term sedimentation on high inter-tidal mudflats and salt marshes in the Severn Estuary, SW Britain: the role of wind and tide. Mar Geol 150:1–27
Becki D, Ervine DA, Lardet P (2006) A comparison of one and two dimensional model simulation of the Clyde Estuary, 7th Conference on Hydroscience and Engineering, Philadelphia, USA
Binding CE, Bowers DG (2003) Measuring the salinity of the Clyde sea from remotely sensed ocean colour. Estuar Coast Shelf Sci 57:605–611
Cressey M, Johnson M (2004) Coastal zone assessment survey: Firth of Clyde and Isle of Bute, Report No. 876, The SCAPE Trust and Firth of Clyde Forum on behalf of Historic Scotland
Curran JC (1981) A finite element model of pollution in the Clyde Estuary: formulation, validation and utilisation. Appl Math Model 5:137–142
DeVriend HJ, Capobianco M, Chesher T, deSwart HE, Latteux B, Stive MJF (1993) Approachestolong-termmodellingofcoastalmorphology: areview. Coastal Eng 21:225–269
Firth CR, Collins EF (2002) Coastal processes and management of Scottish Estuaries: IV. Firth of Clyde, Review No. 8, Scottish Natural Heritage
Ghil M, Mullhaupt AM, Pestiaux P (1987) Deep water formation and Quaternary glaciations. Climate Dyn 2:1–10
HR Wallingford (1996) Saltcoats to Troon: coastal processes and development, Report EX3327, Wallingford, Oxford
Jones G, Sayeed A (2000) The impact of coastal flooding on conservation areas: a study of the Clyde Estuary, Scotland. J Coast Conservat 6:171–180
Karunarathna H, Reeve DE (2008) A Boolean approach to long-term morphological evolution in estuaries. J Coast Res 24(2B):51–61
Kaya Y, Stewart M, Becker M (2005) Flood forecasting and flood warning of the Firth of Clyde, UK. Nat Hazards 36:257–271
Lanzoni S, Seminara G (2002) Long term evolution and morphodynamic evolution of tidal channels. J Geophys Res 107(C1):1–12
Muller FLL, Tranter M, Balls PW (1994) Distribution and transport of chemical constituants in the Clyde Estuari. Estuar Coast Shelf Sci 39:105–126
Nicolis C (1982) A Boolean approach to climate dynamics. Q J Roy Meteorol Soc 108:707–715
Niedoroda AW, Reed CW, Stive M, Cowell P (2001) Numerical simulations for coastal tract morphodynamic, Coastal Dynamics 2001. ASCE, Lund, Sweden, pp 403–412
Pethick JS (1984) An introduction to coastal geomorphology. Edward Arnold, London
Pethick JS (1992) Saltmarsh geomorphology. In: Allen JRJ, Pye K (eds), Saltmarshes, morphodynamics, conservation and engineering significance. Cambridge University Press
Pethick JS (1994) Estuaries and wetlands: function and form. In: Wetland management. Thomas Telford, London, pp 75–87
Poodle T (1986) Freshwater inflows to the Firth of Clyde. Proc R Soc Edinb 90B:55–66
Portney PR (1991) Assessing and managing the risks of climate change. In: Rosenburgh NJ, Easterling WE, Crosson PR, Darminster J (eds), Green house warning: abatement and adaptation, Resources for the future. Washington DC, pp 83–90
Rennie AF, Hansom JD (2010) Sea level trend reversal: land uplift outpaced by sea level rise on Scotland’s coast. Geomorphology. doi:10.1016/j.geomorph.2010.09.015
Saunders A, Ghil M (2001) A Boolean delay equation model of ENSO variability. Phys D 160:54–78
Simpson JH, Rippeth TP (1993) The Clyde Sea: a model of the seasonal cycle of stratification and mixing. Estuar Coast Shelf Sci 37:129–144
Spearman JR, Dearnaley MP, Dennis JM (1997) A simulation of estuary response to training wall construction using a regime approach. Coastal Eng 33:71–89
Tett P, Gowen R, Grantham B, Jones K, Miller BS (1986) The phytoplankton ecology of the Firth of Clyde Sea lochs Striven and Fyne. Proc Roy Soc Edinb B Biol Sci 90:223–238
Thompson JC, Hills JM, Bennett AM (1997) Dynamics of massive freshwater flux in the Clyde Estuary. Estuar Coast Shelf Sci 44:385–393
Townend IH (2004) Identifying change in estuaries. J Coast Conservat 10:5–12
Van Goor MA, Stive MJF, Wang ZB, Zitman TJ (2001) Influence of relative sea level rise on coastal inlets and tidal basins, Proceedings of Coastal Dynamics 2001. ASCE, Lund, pp 383–392
Wallis SG, Crowther JM, Curran JC (1995) Longitudinal solute transport in the upper Clyde Estuary, Scotland. Environ Int 21(6):765–778
Wigley TML, Pearman GI, Kelly PM (1992) Indices and indicators of climate change: Issues of detection, validation and climate sensitivity. In: Mintzer IM (ed), Confronting climate change. Cambridge University Press
Wohlleben TMH, Weaver AJ (1995) Interdecadal climate variability in the subpolar North Atlantic. Climate Dyn 11(8):459–467
Zaliapin I, Keilis-Borok V, Ghil M (2003) A Boolean delay equation model of colliding cascades. Part I: Multiple seismic regimes. J Stat Phys 111:815–837
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The author wishes to dedicate this paper to the late Prof. Alan Ervine, University of Glasgow, who provided constructive comments and suggestions during the preparation of the manuscript. Also, the author acknowledges constructive comments from the reviewer that contributed to improve the quality of the manuscript.
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Karunarathna, H. Modelling the long-term morphological evolution of the Clyde Estuary, Scotland, UK. J Coast Conserv 15, 499–507 (2011). https://doi.org/10.1007/s11852-010-0138-8
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DOI: https://doi.org/10.1007/s11852-010-0138-8