Definition of performance indicators for urban water distribution systems in drought conditions

摘要

The present study proposes a procedure for analysing urban water distribution system characterised by intermittent supply service under drought conditions. Namely, ten new performance indicators have been defined able to identify inequality in water supply both considering effects on users, whose consumption reduces, and effects on network, whose hydraulic behaviour during the service cycle greatly varies. The procedure has been applied to analyse the performance of an existing supply system in Palermo (Italy). The network and users' behaviour in intermittent distribution conditions have been monitored and a mathematical model has been arranged and calibrated in order to evaluate the impact of water scarcity events on population and consequently suggest actions for improving resources distribution equity.