Assessing the water quality response to an alternative sewage disposal strategy at bathing sites on the east coast of Ireland

MARINE POLLUTION BULLETIN

卷:91

Article

Bedri, Zeinab¹  O'Sullivan, John J.¹  Deering, Louise A.²  Demeter, Katalin²  Masterson, Bartholomew²  Meijer, Wim G.²  O'Hare, Gregory³ 

[1] Univ Coll Dublin, Dooge Ctr Water Resources Res, Sch Civil Struct & Environm Engn, Dublin 4, Ireland

[2] Univ Coll Dublin, Sch Biomol & Biomed Sci, Dublin 4, Ireland

[3] Univ Coll Dublin, UCD Sch Comp Sci & Informat, Clar Ctr, Dublin 4, Ireland

关键词: Sewage discharges;    Three-dimensional model;    Bathing water quality;    Escherichia coli;   

DOI  :  10.1016/j.marpolbul.2014.11.008

来源: Elsevier

【 摘 要 】

A three-dimensional model is used to assess the bathing water quality of Bray and Killiney bathing sites in Ireland following changes to the sewage management system. The model, firstly calibrated to hydrodynamic and water quality data from the period prior to the upgrade of the Wastewater Treatment Works (WwTW), was then used to simulate Escherichia coil (E. coil) distributions for discharge scenarios of the periods prior to and following the upgrade of the WwTW under dry and wet weather conditions. E. coil distributions under dry weather conditions demonstrate that the upgrade in the WwTW has remarkably improved the bathing water quality to a Blue Flag status. The new discharge strategy is expected to drastically reduce the rainfall-related incidents in which environmental limits of the Bathing Water Directive are breached. However, exceedances to these limits may still occur under wet weather conditions at Bray bathing site due to storm overflows that may still be discharged through two sea outfalls offshore of Bray bathing site. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

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