Chlorine Decay Modeling in a Water Distribution Network in Mohammedia City, Morocco

Abstract

Water quality modeling has become a recurring request from drinking water network managers, due to regulatory changes but also to contribute to all users’ satisfaction with the taste of the water. The objective of this research project is to provide network managers, both for the understanding of the phenomena studied and for the technical valuation of the approaches considered, with a new methodology to develop a predicting method for free residual chlorine concentrations using an accurate hydraulic model. The development of the chlorines model needed knowledge of the network’s hydraulic behavior. The model established can be used in a proactive and daily mode of operation. It is helpful to show the quality of drinking water, particularly chlorine concentration, during peak demand and the lowest demand times before it is found in the distribution network’s district hydraulic part. Based on the results of this simulation, we have identified a low content of free chlorine in the cast iron pipes due to the high consumption of chlorine by the ferrous ions (Fe2+), which generates a significant vulnerability among con-sumers. The outcomes demonstrated that utility managers may more easily optimize residual chlorine in sizable water distribution networks using the suggested approach.