c © TÜB_ITAK DYNAQ: A Chlorine Decay Simulator in Water Supply Networks

Drinking water chlorination is an important issue for public health. Chlorine deciency may lead to contamination of water whereas an excess amount of chlorine may cause trihalomethanes, which are sus-pected carcinogens. Therefore, it is very important to use the correct amount of chlorine in drinking water supply networks. Since chlorine is a highly reactive and decaying halogen, estimation of the concentration in drinking water supply networks has been the subject of many research projects. The objective of this paper is to describe a real-time chlorine decay and propagation simulation program developed for drinking water supply networks. The program can be used for other chemicals, biological changes and contaminant propagation in water supply networks. The proposed algorithm is based on a chronological activity list of events occurring in the network in order to enhance the ecient usage of computer storage, computational eectiveness and numerical accuracy. The program can handle dynamic hydraulic simulation and is less sensitive to the layout of the network and to the length of the simulation period than models available so far