WIT Press

Analysis Of Intermittent Supply Systems In Water Scarcity Conditions And Evaluation Of The Resource Distribution Equity Indices


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WIT Press


C. M. Fontanazza, G. Freni & G. La Loggia


Generally, urban water distribution shortage situations are solved by introducing discontinuous service and rationing the available water resources. This approach is widely adopted, not only in developing countries but also in developed ones, for solving short term scarcity conditions which can be caused by unpredicted drought periods. Intermittent distribution has the advantage of requiring small financial efforts but it leads to network operating conditions that are very far from the usual design ones. With the aim to analyse and describe the water supply network behaviour in intermittent conditions, a network hydraulic model has been set up in which both user and manager dependent regulation structures have been schematised (pumps, private reservoirs, etc.). The analysis allowed evaluating network performance introducing several control strategies so suggesting operational plans for reducing the impact of water scarcity events on population and improving resources distribution equity. The presented model has been applied to the water distribution network of Palermo (Italy). Keywords: distribution network performance, water scarcity conditions, intermittent distribution. 1 Introduction The urban development and the population growth have several consequences connected with design and management of water distribution systems. The contemporary increase in water consumption and reduced availability of water resources produce unbalances between water demand and offer, so leading to


distribution network performance, water scarcity conditions, intermittent distribution.