过水围堰施工导流联合泄流管理是典型的半结构化决策问题，为此设计开发了过水围堰施工导流联合泄流管理决策支持系统（CDDSS）。系统地介绍了CDDSS的结构框架、设计原则、开发思路、决策模式和基本功能，该系统由数据库子系统、模型库子系统、图形库子系统和人机界面四部分组成，此系统是建立在数学模型的基础上，综合利用系统科学、管理科学、施工导流的理论及方法的人机交互系统。工程实例分析表明，系统友好的用户界面帮助决策者/用户充分利用系统的功能做出有效的实时决策。

Management on the jointly discharging of overtopped cofferdam is a typical semi-structured problem. So a decision support system is designed to address the management on the jointly discharging of overtopped cofferdam. This paper introduces systematically the structural framework, design principle, decisionmaking mode, and fundamental function of CDDSS. The system consists of four components： database subsystem, model base subsystem, graphics base subsystem, method base subsystem, and user-interface. A CDDSS is a man-machine interactive system,which integrates computer science and technology with the theory and method of systems science, management science and the theory and method of hydraulic and electric engineering. The case study illustrates that the friendly window-based user interface of the system enables the decision maker/user to take full advantage of the capabilities of the system in order to make effective real-time decisions.