Development And Application Of Water Environment Real-time Regulation Of DSS And3D Channel Simulation Platform

With the rapid development of computer and technology of surveying and mapping, more and more professional decision support systems have been used in the early warning and decision-making management in various industries based on GIS and the virtual reality technology. It is of great importance to the research of professional decision area computer technology point and its implementation method, to make full use of modern new technology (like computer technology) and improve the decision-making ability. This paper set the "real-time control decision support system of the beiyun river water environment" and the "multiple cooperating system integration of intelligent navigation and the research of key technology related" as the research background, supported by the ministry of science and technology of water special project and the national five-year science and technology support plan project respectively. We have developed the real-time control decision support system of water environment based on GIS and the3D digital channel simulation platform based on virtual reality technology, further studied the technology of complex large system integration method and3D simulation platform. The main research contents and results are as follows:(1) Studied many modules of water environment real-time control decision support system, such as the comprehensive data monitoring system, the database, the valley into the river pollution load model, the river water environment model, the water environment carrying ability and load regulation model, the GIS platform and so on. We established the overall framework of water environment real-time control decision support system from the angle of system and integration. Mathematical model for a variety of methods of the link integration, interaction method between mathematical model and GIS display system, the status of water environment real-time simulation and the plan simulation based on control measures of key links are detailed analyzed, the idea and method of water environment real-time control and digital management function in the complex large system are put forward, this has provides a simple and practical integration patterns for the development complex water environment control system. The development system has been applied in the water environment management of beiyun river. (2) Studied the3D digital channel virtual environment building technology and implement the3D digital channel model of Yangtze river upstream with different levels of accuracy. This part mainly discusses the huge amounts of data modeling and rendering technology based on osgEarth, research the method of realize elevation and image huge amounts of data real-time control through the tile data storage and load scheduling principle, its implement the data tiles paging scheduling mechanism and rendering based on dynamic change point of view. In brief, it realized the whole system integrated management of various kinds of section data through the research on the scene data configuration files(Earth file) of osgEarth, and its set up a network server based on Apache, the network transmission and data sharing of image, elevation, vector data and so on is realized.(3) Developed a database, GPS module, channel warning module and integrated the3D virtual environment module and the hydrodynamic numerical model, build the3D digital channel simulation platform, this platform provide the tools and supported technology for improve the efficiency of shipping and security early warning capabilities. The detail development as follows:the database design and data management visualization module has been completed; Developed GPS positioning data parsing and transmission module, realized the ship distribution display and trajectory playback positioning; Developed long-distance viewpoint follow module and the driver driving module, provide location information, the flow regime information, boats around information, across the bridge and the limit of bridge elevation information combined of ship positioning information and water dynamics simulation results, these information could provide comprehensive early warning information for the safe navigation of ships.