随着供用水矛盾的日益突出，城市大量挤占农村和生态环境用水，从缓解供用水矛盾、改善生态环境的角度看，开展节水型城市建设势在必行。利用系统动力学方法仿真模拟天津市2005-2030年在基本方案、产业结构调整、水价调控、定额调整、城市非常规水源利用、综合节水等不同模式下的水资源供需状况，以定量分析方法确定各激励机制的节水效应，为进一步完善天津市节水型城市建设管理模式提供参考。

With the contradictions of water use and supply are increasingly intensified, a large quantity of water for the ecological environment and agriculture are crowded out by urban. For easing the water conflicts and improving the ecological environment, to carry out water-saving city construction is imperative. In this paper, the integrated water resources supply and demand of Tianjin in 2005-2030 are simulated under different modes of the basic program, industrial reconstruction,price control, quota adjustment and urban non-conventional water sources utilization. The effect of water-saving incentive mechanism is analyzed quantitatively. The result obtained by the paper may provide a reference for further improving the city construction and management of water saving city.