Hydrodynamic modelling of microbial water quality in drinking water sources
Doktorsavhandling, 2013

The faecal contamination of water sources can cause waterborne disease outbreaks among drinking water consumers. To design drinking water treatment and minimise consumer health risks, knowledge on source water quality is needed. The aim of this thesis was to describe the microbial water quality in water sources in order to facilitate the provision of safe drinking water. In this thesis, hydrodynamic modelling, microbial source tracking (MST), and quantitative microbial risk assessment (QMRA) were combined to study two surface drinking water sources, Lake Rådasjön and the river Göta älv in Sweden. The microbial water quality in these water sources was successfully characterised by the developed hydrodynamic models. The results demonstrated that the concentrations of faecal indicators and pathogens in these water sources vary and are event-driven. In the lake, the contaminant transport was strongly affected by wind conditions and by the vertical temperature stratification; in the river, the contaminant transport was driven by the water flow. Both for the lake and river, human faecal sources were the main contributors to the contamination at the water intakes. Based on the obtained results, recommendations for the management of the microbial risks concerning the studied water sources were formulated. It can be concluded that hydrodynamic modelling is a very useful approach to describe and predict the microbial water quality in drinking water sources. In this thesis, hydrodynamic modelling was successfully applied to study the factors that affect the contaminant spread in the water source, to capture the spatial and temporal variability of the microbial water quality, to provide short-term forecasts, and to test hypothetical scenarios. Furthermore, the results of the hydrodynamic modelling improved the interpretation of the MST data and provided input for QMRA. The novelty of this thesis lies in using hydrodynamic modelling in combination with MST and QMRA, in order to enhance the applicability and output of each individual approach, and to describe and predict the microbial water quality in drinking water sources.

faecal contamination

QMRA

faecal indicators

pathogens

risk assessment

microbial source tracking

Bacteroidales

E. coli

VF
Opponent: Joan B. Rose

Författare

Ekaterina Sokolova

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Decay of Bacteroidales Genetic Markers in Relation to Traditional Fecal Indicators for Water Quality Modeling of Drinking Water Sources

Environmental Science & Technology,; Vol. 46(2012)p. 892-900

Artikel i vetenskaplig tidskrift

Estimation of pathogen concentrations in a drinking water source using hydrodynamic modelling and microbial source tracking

Journal of Water and Health,; Vol. 10(2012)p. 358-370

Artikel i vetenskaplig tidskrift

Hydrodynamic modelling of the microbial water quality in a drinking water source as input for risk reduction management

Journal of Hydrology,; Vol. 497(2013)p. 15-23

Artikel i vetenskaplig tidskrift

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Ämneskategorier

Vattenteknik

Oceanografi, hydrologi, vattenresurser

ISBN

978-91-7385-920-2

VF

Opponent: Joan B. Rose

Mer information

Skapat

2017-10-07