A three-dimensional hydro-environmental model of Dublin Bay

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dc.contributor.author Bedri, Zeinab
dc.contributor.author Bruen, Michael
dc.contributor.author Dowley, Aodh
dc.date.accessioned 2011-08-04T15:52:42Z
dc.date.available 2011-08-04T15:52:42Z
dc.date.copyright 2011 Springer Science+Business Media B.V. en
dc.date.issued 2011-08
dc.identifier.citation Environmental Modeling and Assessment en
dc.identifier.issn 1420-2026 (Print) 1573-2967 (Online)
dc.identifier.uri http://hdl.handle.net/10197/3067
dc.description.abstract This paper compares a 3-dimensional hydro-ecological model with a 2-dimensional model simulating the distribution and fate of Escherichia Coli (E.Coli) discharges from a sewage treatment plant discharging into Dublin Bay, Ireland. Before being discharged, the effluent from the sewage treatment plant is mixed with cooling water from a thermal generation plant resulting in a warm buoyant sewage plume that can be 7 − 9oC higher than the ambient water in the Bay. The mixing of the stratified plume is complicated by the tidal currents which transport the plume into and out of the estuary. These processes have a direct impact on the transport and fate of E.Coli and the model comparison demonstrates that a three-dimensional model is required to adequately represent the mixing processes in such a stratified environment. The modelling followed a two-step procedure. First, hydrodynamic simulations of water levels and flow velocities in Dublin Bay were performed using the three-dimensional model TELEMAC-3D. The resulting water level and flow velocity fields were used by the three-dimensional water quality model, SUBIEF-3D to model the transport and fate of E.Coli in the Bay. Further simulations were performed in which the wind effects on the E.Coli dispersion were included. The water quality simulation was repeated using the 2-dimensional, depth-averaged, hydrodynamic model TELEMAC-2D to compare with the three-dimensional simulations. The results showed that the three-dimensional model gives an adequate representation of the hydrodynamics and water quality in the Bay while the two-dimensional, depth-averaged, water quality model (in comparison to the three-dimensional model) delays the timing of the delivery of E.Coli to the Bay and seriously underestimats the decay rate of E.Coli and the effect of wind on the movement of the buoyant plume of pollution. en
dc.description.sponsorship Other funder en
dc.format.extent 269852 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Springer en
dc.relation.requires Architecture, Landscape & Civil Engineering Research Collection en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.rights “The final publication is available at springerlink.com” en
dc.subject Three-dimensional modelling en
dc.subject Bathing water directive en
dc.subject Escherichia Coli modelling en
dc.subject Depth-averaged en
dc.subject Wind effect en
dc.subject Cooling water discharges en
dc.subject Coastal waters en
dc.subject Environmental impact assessment en
dc.subject Water quality en
dc.subject.lcsh Sewage disposal plants--Environmental aspects--Ireland en
dc.subject.lcsh Environmental impact analysis--Computer simulation en
dc.subject.lcsh Water quality--Ireland--Dublin en
dc.subject.lcsh Hydrodynamics--Computer simulation en
dc.subject.lcsh Electric power production--Environmental aspects--Ireland en
dc.title A three-dimensional hydro-environmental model of Dublin Bay en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions http://dx.doi.org/10.1007/s10666-011-9253-7 en
dc.status Peer reviewed en
dc.identifier.volume 16 en
dc.identifier.issue 4 en
dc.identifier.startpage 369 en
dc.identifier.endpage 384 en
dc.identifier.doi 10.1007/s10666-011-9253-7
dc.neeo.contributor Bedri|Zeinab|aut| en
dc.neeo.contributor Bruen|Michael|aut| en
dc.neeo.contributor Dowley|Aodh|aut| en
dc.description.othersponsorship EU INTERREG en
dc.description.admin 12M embargo - release 23/02/2012 - AV 2/08/2011 en

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