Constructive Study Of The Basin Flood Control Decision Supporting System

Basin flood control decision supporting system consists of information collecting system, communicating system, network system and decision supporting system. This paper studies and summarizes the establishment process and key techniques of the basin flood control decision supporting system from information collecting system, communicating system, network system to decision supporting system, combining with development and establishment of the flood control decision supporting system of the upper reach of Nan Pan river on the basis of concept and structure of decision supporting system. (1)Data base and its management system. This paper analyzes what kind of data bases should be established, and how to manage them in basin flood control decision supporting system etc. by fully making use of the currently already-mature data base techniques. In the establishment of the data base of the flood control decision supporting system of the upper reach of Nan Pan river applies SQL SERVER2000 data base, on which the hydro-information data base, annals flood data base, project information data base, basic data base and space data base are established. (2)Model data base and its management system. Because of the premature development of the model data base techniques, this paper has made some research on to establish what kind of model nowadays can adapt the future development of model data base techniques, departing from the principles of model data base establishment. The current model design still focuses on the model interface, which is of great significance to management to the model and model data base. The current research of model data base system has two aspects: one is model data base and its management system based on relational data base; the other is object oriented model data base and its management system. The model data base and its management established in the flood control decision supporting system on the upper reach of the Nan Pan river is based on SQL SERVER2000 data base, on which the forecast model data base, control model data base and basic technique data base etc. are established. Meanwhile, this paper has still made some research on some models and the principles of some methods and how to establish them. (3)The knowledge data base and its management system. The key problems in the knowledge data base technique application are the formalization of knowledge and the formation of the knowledge data base. One of the developing trends of decision supporting system is application of the expert system, namely how to reveal the knowledge of the experts and their successful experience and finally to make DSS fully apply human knowledge. The research of the knowledge data base is also based on two aspects: the knowledge data base based on relational data base and the object oriented knowledge data base. The research of the knowledge data base should fully combine with and make use of the research result and developing experience of data base system. This paper also introduces the establishment of the flood control knowledge data base based on the pre-scheme of the flood control on the upper reach of Nan Pan river. Finally, this paper studies the loss caused by submergence, and generally analyzes the two cases of submergence and calculates the submergence based on the graticule model and also studies the establishment of the TIN model.