Water Distribution System Modeling by Using EPANET Software

Abstract

Sustainable development is a prime concern now a days. A good water infrastructure plays a key role for any kind development for a city. Here in this study, capital city of Bangladesh, Dhaka has been focused for analysis purpose. Although the average condition of the municipals water infrastructure systems are poor and deteriorating fast. Supply water distribution network of Banani area was selected for detail analysis. The area has been modeled using EPA-NET software on the basis of data surveyed by Dhaka WASA. An efficient water distribution system depends on adequate pressure head, velocity and flow rate. Ensuring all of this is a challenging task. Calculation of required pressure head, velocity coverage, flow rate, chlorine dosage has been done. Fire demand coverage has been analyzed for Banani area. Fire demand analysis gives the full overview of the system in the emergency condition. In water supply system chlorine is used for neutralize bacteria and make the water pure. The modelling of chlorine residual in water supply systems is of great importance in managing disinfectant concentrations throughout the network. EPANET brought enhanced capabilities for the simulation of vi chlorine residuals in water supply systems. Here chlorine dose analysis has also been performed. A simulation on chlorine dose has been run to calculate the amount of chlorine that will be needed for the whole system. It will increase the efficiency of the system. Two types of scenarios has been simulated. Like, reducing the diameter of the pipes and using a multiple factor of 1.1. These scenarios indicates how will the system behave in case of failure condition. Finally, this study offers a modeling strategy of water distribution system of Banani area which will also help to overcome the possible risks & uncertainties. It will also improve the efficiency and performance of the network.