VIRTUAL CITY FOR WATER DISTRIBUTION RESEARCH IN CRISIS MANAGEMENT

Abstract eng:
In our society infrastructure data are crucial and research on critical infrastructures is difficult since experiments on real systems cannot be publicized. Virtual cities are one potential answer to this problem. IDEAL CITY is a virtual city of about 900000 residents fully described in GIS and other software for infrastructures modelling The city is currently under development and it will incorporate all critical infrastructures and its interdependencies, such as electric power grid, transportation, gas network and agent’s networks. In this paper an example of using IDEAL CITY for simulation of an earthquake event on the water distribution network is presented. The earthquake event is characterized by a PGV of 25.04 cm/s. The city is assumed to be located on rough sandy gravel. The WDN is split in 10 districts while six pipes of different diameter made of ductile iron material has been considered in the network. Different scenarios have been selected considering the probability of failure of each pipe and a weight factor related to the diameter of the pipe itself. A method to reduce the number of scenarios analyzed that is based on the probability density function of the different events has been proposed. Finally, a resilience index has been used to compare different scenario events that is based on the number of household without service and the numerical results have been discussed. In the future, further models will be added to take into account for risk and probability of failure of critical infrastructures due to extreme events (e.g. natural and manmade hazards). The main idea is to use IDEAL CITY to develop a virtual city that will serve as a hub for the development of further research models.

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