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Hydrodynamic Modelling of Microbial Water Quality in a Drinking Water Source

  • Ekaterina Sokolova
  • Thomas J.R. Pettersson
  • Olof Bergstedt
  • Malte Hermansson
Conference paper

Abstract

The presence of faecal contamination in drinking water sources can cause waterborne disease outbreaks. The aim of this article was to study the influence of wastewater discharges from a wastewater treatment plant on microbial water quality in a drinking water source—the river Göta älv in Sweden. To fulfil this aim, the fate and transport of the faecal indicators E. coli and somatic coliphages in the river Göta älv were simulated using a three-dimensional hydrodynamic model. The validation of the hydrodynamic model confirmed a good model performance: the correlation coefficient was 0.99; the absolute mean difference between the simulated and measured water surface elevation was 0.03 m, which is 11.1 % of the standard deviation of the measured data. The modelling results revealed that during overflow events at the wastewater treatment plant, discharges of untreated wastewater contributed more to the concentrations of faecal indicators at the water intake than discharges of treated wastewater. The hydrodynamic modelling of microbial water quality proved to be a useful tool to estimate the contribution of different sources to the total contamination of raw water used for drinking water supply and, therefore, to provide decision-support information for preventive and mitigative risk-reduction measures.

Keywords

Water Intake Wastewater Treatment Plant Faecal Contamination Drinking Water Source Overflow Event 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors are grateful for the funding provided by the EU project VISK (Interreg IV A program); the Graduate School on Environment and Health (Forskarskolan Miljö och Hälsa) of the Chalmers University of Technology and the University of Gothenburg, Sweden; the Swedish Water and Wastewater Association (Svenskt Vatten). The authors are also grateful for the data provided by the Swedish Geotechnical Institute (SGI), the Swedish Maritime Administration (Sjöfartsverket), the Swedish Meteorological and Hydrological Institute (SMHI), Göteborgs Stad, Göteborg Vatten, Vattenfall, the municipalities of Ale and Trollhättan. Thanks are also due to Niels Markwat for his help with the statistical analyses.

References

  1. 1.
    DHI (2004) MIKE 21/3 Ecological modelling: MIKE21/3 ECO Lab FM short description. DHI Water & Environment, HorsholmGoogle Scholar
  2. 2.
    DHI (2011) MIKE 21 & MIKE 3 Flow model FM hydrodynamic and transport module—scientific documentation. DHI Water & Environment, HorsholmGoogle Scholar
  3. 3.
    GÄVVF (2006) Facts about the river Göta älv: a description of the river Göta älv and its surroundings 2005. (In Swedish: “Fakta om Göta älv: en beskrivning av Göta älv och dess omgivning 2005”). Göta älvs Vattenvårdsförbund (GÄVVF)—water management association of the river Göta älv, GothenburgGoogle Scholar
  4. 4.
    Hrudey SE, Hrudey EJ (2004) Safe drinking water: lessons from recent outbreaks in affluent nations. vol 3. IWA Publishing, LondonGoogle Scholar
  5. 5.
    Kashefipour SM, Lin B, Falconer RA (2006) Modelling the fate of faecal indicators in a coastal basin. Water Res 40(7):1413–1425CrossRefGoogle Scholar
  6. 6.
    Liu L, Phanikumar MS, Molloy SL, Whitman RL, Shively DA, Nevers MB, Schwab DJ, Rose JB (2006) Modeling the transport and inactivation of E. coli and enterococci in the near-shore region of Lake Michigan. Environ Sci Technol 40(16):5022–5028CrossRefGoogle Scholar
  7. 7.
    Mac Kenzie WR, Hoxie NJ, Proctor ME, Gradus MS, Blair KA, Peterson DE, Kazmierczak JJ, Addiss DG, Fox KR, Rose JB, Davis JP (1994) A massive outbreak in Milwaukee of Cryptosporidium infection transmitted through the public water supply. New Engl J Med 331(3):161–167CrossRefGoogle Scholar
  8. 8.
    Mancini JL (1978) Numerical estimates of coliform mortality rates under various conditions. J Water Pollut Control Federation 50(11):2477–2484Google Scholar
  9. 9.
    Riou P, Le Saux JC, Dumas F, Caprais MP, Le Guyader SF, Pommepuy M (2007) Microbial impact of small tributaries on water and shellfish quality in shallow coastal areas. Water Res 41(12):2774–2786CrossRefGoogle Scholar
  10. 10.
    Sanders BF, Arega F, Sutula M (2005) Modeling the dry-weather tidal cycling of fecal indicator bacteria in surface waters of an intertidal wetland. Water Res 39(14):3394–3408CrossRefGoogle Scholar
  11. 11.
    Seitz SR, Leon JS, Schwab KJ, Lyon GM, Dowd M, McDaniels M, Abdulhafid G, Fernandez ML, Lindesmith LC, Baric RS, Moe CL (2011) Norovirus infectivity in humans and persistence in water. Appl Environ Microbiol 77(19):6884–6888CrossRefGoogle Scholar
  12. 12.
    Sokolova E, AsÌtröm J, Pettersson TJR, Bergstedt O, Hermansson M (2012) Estimation of pathogen concentrations in a drinking water source using hydrodynamic modelling and microbial source tracking. J Water Health 10(3):358–370CrossRefGoogle Scholar
  13. 13.
    Sokolova E, Åström J, Pettersson TJR, Bergstedt O, Hermansson M (2012) Decay of Bacteroidales genetic markers in relation to traditional fecal indicators for water quality modeling of drinking water sources. Environ Sci Technol 46(2):892–900CrossRefGoogle Scholar
  14. 14.
    Thupaki P, Phanikumar MS, Beletsky D, Schwab DJ, Nevers MB, Whitman RL (2010) Budget analysis of Escherichia coli at a southern Lake Michigan Beach. Environ Sci Technology 44(3):1010–1016CrossRefGoogle Scholar
  15. 15.
    Walker Jr FR, Stedinger JR (1999) Fate and transport model of Cryptosporidium. J Environ Eng 125(4):325–333CrossRefGoogle Scholar
  16. 16.
    Zhu X, Wang JD, Solo-Gabriele HM, Fleming LE (2011) A water quality modeling study of non-point sources at recreational marine beaches. Water Res 45(9):2985–2995CrossRefGoogle Scholar
  17. 17.
    Åström J, Pettersson TJR (2007) Wastewater discharges and microbial contamination in a drinking water source the river Göta älv (In Swedish: “Avloppsutsläpp och mikrobiologisk påverkan i råvattentäkten Göta älv”). Svenskt Vatten Utveckling, StockholmGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Ekaterina Sokolova
    • 1
  • Thomas J.R. Pettersson
    • 1
  • Olof Bergstedt
    • 1
    • 2
  • Malte Hermansson
    • 3
  1. 1.Water Environment TechnologyChalmers University of TechnologyGothenburgSweden
  2. 2.Göteborg Vatten, Göteborgs StadAngeredSweden
  3. 3.Department of Cell and Molecular Biology, MicrobiologyUniversity of GothenburgGothenburgSweden

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