Simulation based water resources allocation decision support system for Beijing

Sufficient quantity and quality of water resources are preconditions for the development of big cities. Water scarcity is especially a main restrict-ing factor for cities in semi-arid or arid climate zones. An example for such a city is Beijing. The capital of P.R. China takes up the challenge of water shortage, the outstanding conflict between water supply and demand. Sustainable utilization of water resources through modern technologies has become an important research subject. In this paper the approach of an decision support system (DSS) for the joint optimal operation of different water sources such as surface water, ground water, recycled water and transferred water is presented. It will be developed in the frame of the joint Chinese- German project "Toward Water-Scarcity Megalopolis's Sustain-able Water Management System". The project is of significance for the sustainable development of economics and society in Beijing and the suc-cess of the Olympic Games in 2008. An indispensable requirement for such a DSS is a simulation model of the water resources and the water supply system