%0 Journal Article %T Modelling water quality in drinking water distribution networks from real-time direction data %A S. Nazarovs %A S. Dejus %A T. Juhna %J Drinking Water Engineering and Science Discussions %D 2012 %I Copernicus Publications %R 10.5194/dwesd-5-31-2012 %X Modelling of contamination spread and location of contamination source in a water distribution network is an important task. The paper considers applicability of real-time flow direction data based model for contaminant transport for a distribution network of a city. Simulations of several contamination scenarios are made to evaluate necessary number of flow direction sensors. It is found that for a model, containing major pipes of Riga distribution system, sensor number decrease from 927 to 207 results in average 20% increase of simulated contaminated length of pipes. Simulation data suggest that optimal number of sensors for Riga model is around 200. %U http://www.drink-water-eng-sci-discuss.net/5/31/2012/dwesd-5-31-2012.pdf