Hydrodynamic modelling and forecasting of microbial water quality in a drinking water source
Journal article, 2014

Faecal contamination often enters drinking water sources through emergency discharges, which occur as a result of technical malfunctions or a hydraulic overload of the sewer system during periods of heavy rain. In October–November 2012, several emergency discharges entered Lake Rådasjön – a drinking water source for Gothenburg, Sweden. To describe and forecast the influence of these emergency discharges on the microbial water quality, the spread of Escherichia coli (E. coli) within the lake was simulated using a three-dimensional hydrodynamic model. The model was run for a period of four months using the observed data, and for a period of 9 days using meteorological forecast data. The modelling results showed how much every contamination source contributed to the total E. coli concentrations at the water intakes. The agreement between the modelling results and the measured concentrations was satisfactory. The results of this study led to the decision to use the lake for drinking water production. This study demonstrated that the proposed modelling approach can be used to provide short-term forecasts of the microbial water quality in drinking water sources.

faecal contamination

MIKE 3 FM

water quality modelling

sewer overflows

E. coli

lake

Author

Ekaterina Sokolova

DRICKS - Framework programme for drinking water research at Chalmers

Chalmers, Civil and Environmental Engineering, Water Environment Technology

Thomas Pettersson

DRICKS - Framework programme for drinking water research at Chalmers

Chalmers, Civil and Environmental Engineering, Water Environment Technology

Olof Bergstedt

DRICKS - Framework programme for drinking water research at Chalmers

Chalmers, Civil and Environmental Engineering, Water Environment Technology

Aqua

0003-7214 (ISSN) 1365-2087 (eISSN)

Vol. 63 3 189-199

Areas of Advance

Building Futures (2010-2018)

Subject Categories

Water Engineering

DOI

10.2166/aqua.2013.216

More information

Created

10/6/2017