Mathematical Optimization Of The Main WaterDistribution System City Of Hanoi, Vietnam

Abstract

Many expanding cities in developing countries suffer from insufficient technical infrastructures. Water supply is considered with priority to improve environmental conditions. The greater part of any cost of urban water supply is due to distribution. Network rehabilitation aims at flow and pressure improvements, leakage and quality control, systems design. With scarce finances, limited trained personnel, with climate, customs and traditions different from foreign standards systems analysis becomes a mandatory tool. Whereas various simulation models are available, few methods of network optimization exist capable to treat large systems. Hence, an optimization program will be presented suited to planning in practice and to include desirable citeria. The program is based upon a sequence of algorithmic steps encompassing a decomposition principle from Graph Theory, Linear Programming, Evolution Strategies. The planning application to the city of Hanoi refers to the year 2010. Taking into account uncertain future data, emphasis was placed upon sensitivity analyses sometimes regarded the true benefit of optimization. The results show the corresponding impact of parameter changes upon the design. Different future scenarios can be investigated in support of the final planning decision.