Application of Simulated Annealing for Integrated Urban Water Systems: Infrastructure, Treatment and Re-Use Optimizationby Christopher Zoppou,
Abstract: Escalating costs in providing water supply, waste water and storm water infrastructure and community concerns over the environmental impact of water harvesting and effluent disposal, have focused attention on providing these services in an economically efficient and ecologically sustainable way. To exploit emerging technologies and re-use options it is essential that these are assesed in an integrated water system which includes water supply, waste and storm water treatment and disposal infrastructure. Optimisation provides an automated approach for selecting possible solutions that can satisfy ecological and economical constraints for a complex integrated urban water system. Simulated annealing augmented with heuristic rules are used to search for the solution that minimises the life cycle costs of the water supply and water re-use infrastructure, subject to hydraulic and water quality constraints. The modelling framework and the optimisation strategy that is employed in the model are described in this paper and are demonstrated using a hypothetical problem. This problem is based on a 400 square kilometre urban development in the North-Eastern corridor of Perth, Australia. The problem consists of a number of water sources that can supply water of different qualities and quantities. There are a number of demands requiring different qualities of water for different purposes and a number of re-use and water treatment process options. This example demonstrates that the most cost-effective use of existing and new infrastructure can only be found by exploiting the dynamic interaction of supply, demand, treatment and delivery of water.
Subject Headings: Water treatment | Water supply systems | Municipal water | Infrastructure | Water quality | Integrated systems | Aquatic habitats | Stormwater management | Water conservation | Australia
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