Estimation of pathogen concentrations in a drinking water source using hydrodynamic modelling and microbial source tracking
Artikel i vetenskaplig tidskrift, 2012

The faecal contamination of drinking water sources can lead to waterborne disease outbreaks. To estimate a potential risk for waterborne infections caused by faecal contamination of drinking water sources, knowledge of the pathogen concentrations in raw water is required. We suggest a novel approach to estimate pathogen concentrations in a drinking water source by using microbial source tracking data and fate and transport modelling. First, the pathogen (norovirus, Cryptosporidium, Escherichia coli O157/H7) concentrations in faecal contamination sources around the drinking water source Lake Rådasjön in Sweden were estimated for endemic and epidemic conditions using measured concentrations of faecal indicators (E. coli and Bacteroidales genetic markers). Afterwards, the fate and transport of pathogens within the lake were simulated using a three-dimensional coupled hydrodynamic and microbiological model. This approach provided information on the contribution from different contamination sources to the pathogen concentrations at the water intake of a drinking water treatment plant. This approach addresses the limitations of monitoring and provides data for quantitative microbial risk assessment(QMRA) and risk management in the context of faecal contamination of surface drinking water sources.

Bacteroidales markers

Cryptosporidium

norovirus

faecal contamination

E. coli O157/H7

QMRA

Författare

Ekaterina Sokolova

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Johan Åström

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Thomas Pettersson

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Olof Bergstedt

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Malte Hermansson

Göteborgs universitet

Journal of Water and Health

1477-8920 (ISSN)

Vol. 10 3 358-370

Styrkeområden

Building Futures

Ämneskategorier

Vattenteknik

Oceanografi, hydrologi, vattenresurser

DOI

10.2166/wh.2012.183