Reduction of leakages in water distribution system (WDS) is one of the major concerns for water industries. This paper presents a leakage reduction technique using pressure management by optimizing water level in storage tank along with optimized control and localization of pressure reducing valve (PRV) in WDS. A new mathematical tank and pump simulation algorithm is presented for controlling pressure in WDS, by optimizing water storage level in the tank depending upon the demand variations. Tank is used as decision variable for leakage reduction model. A modified reference pressure algorithm is introduced for improving PRV localization. Multiobjective genetic algorithm (NSGA-II) is used for finding out the optimized operational control setting of PRV for leakage minimization. The proposed algorithm leads to leakage reduction of 26.51% in Anytown WDS and 20.81% in modified benchmark WDS. This technique leads to appreciable reduction of leakage rate, with reduced number of required PRV, with consideration of constraint such as maintaining lower hydraulic failure index (<0.01), emergency storage, etc. It can be concluded that, the proposed novel leakage reduction technique provides better cost effective and efficient solution for leakage control.
- genetic algorithm
- leakage reduction
- pressure management
- tank water storage level optimization
- water distribution system (WDS)
- First received 21 November 2016.
- Accepted in revised form 30 March 2017.
- © IWA Publishing 2017