关键词: WebGIS, 拓扑关系, 水库群调度, 长江流域

Abstract: The Changjiang River Basin contains a complicated river system and a wide range of flood control area. The objects of flood control operations is highly diversified and widely distributed. The reservoirs distribution forms are various in the basin and the reservoirs with different functions are connected in series way or parallel way, posing a complex topological relationship. In order to quickly and accurately figure out the topological relationships of various flood control objects, reservoir groups on mainstream and the tributaries, a WebGIS technology in conceptual model development of water system is introduced. On the basis of object-relational databases, GIS topological model, and internet techniques, and taking a group of reservoirs, sections and flood control objects on upstream Changjiang River as an example, a concise and effective water system is successfully developed. With a more intuitive, interactive and extensible conceptual model, the efficiency of multi-reservoir operation decision-making can be significantly improved.

Key words: WebGIS, topological relationships, reservoir group operation, Changjiang River basin