Water supply in old Jammu city is not evenly distributed due to undulating terrain and increase in population density. A study was undertaken to suggest measures for improvement to the distribution system. The paper presents results of analysis carried out using computer package OPT DIS developed at NEERI for optimal design of distribution sytem including system augmentation and reorganization measures needed for the design year 2021. The analysis of zone 1 of the distribution network indicates that seven pipes need alteation to cater to the demand for the year 2006 and fifteen pipes need replacement for the year 2021. New pipelines (13 nos.) are to be provided in parallel to the existing pipes in Upper Reach and 28 pipes in Lower Reach to ensure the service standards of 225 lpcd with minimum residual head of 17 m. Efficient algorithm for augmentations of water supply systems comprising combination of dead-end and loop network are having much wider application in developing countries. The software OPT DIS developed at NEERI was found to be extremely powerful and user friendly for addressing such systems with varying demand pattern, peaking factor, pipe condition, water supply modes and design horizones.
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