Mathematical simulation on thermal discharges in an estuary

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to determine the effects of thermal discharges from an existing power plant on the water quality of a nearby river with tidal effect, CE-Qual-W2 model was applied. This study aimed the evaluation of the impact on river water temperature after an increase of discharged volumes, due to planned reinforcement of power production. Due to the relatively proximity of withdrawal and discharge structures, both located onshore and under tidal effect, the methodology had to take into account the possibility of discharges affecting the cooling system of the power plant by means of inducing temperature rise at the water intake. Results from this study should also be clear on the need for the installation of a water cooling system, before discharging back into the river. Simulation results suggest high dependence on river flow, as upstream temperature rise was more evident with low river flows. Simulation scenarios using high river flows resulted in lower temperature increase although higher dispersion was observed (downstream only), as the effects of the discharges are noticed further away from the discharge point. Induced stratification was also observed as temperature rise occurs mainly at the upper three meters. In order to meet regulatory compliance, conclusions demonstrated the need for the installation of a water cooling system.

Original languageEnglish
Title of host publicationHydraulic engineering Software VIII
EditorsW.R. Blain, C.A. Brebbia
PublisherWITPress
Pages171-178
Number of pages8
Volume7
ISBN (Print)1853128147
Publication statusPublished - 2000
EventEighth International Conference on Hydraulic Engineering Software, HYDROSOFT 2000 - Lisbon, Portugal
Duration: 12 Jun 200014 Jun 2000

Conference

ConferenceEighth International Conference on Hydraulic Engineering Software, HYDROSOFT 2000
CountryPortugal
CityLisbon
Period12/06/0014/06/00

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  • Cite this

    Rodrigues, A. P. D. N. C., Diogo, P. A., & Coelho, P. S. (2000). Mathematical simulation on thermal discharges in an estuary. In W. R. Blain, & C. A. Brebbia (Eds.), Hydraulic engineering Software VIII (Vol. 7, pp. 171-178). WITPress.