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The urban water supply network affects residents' water use experience and the economic benefits of water supply enterprises, and is an important component of the urban underground pipeline network. With the continuous changes in the pipeline network, the urban water supply network has formed a very complex spatial information system. Due to the difficulty in accurately obtaining information about the water supply network and the traditional manual drawing, manual statistics, and manual analysis management mode which cannot handle the gradually complex information of the network, it is currently very difficult to maintain the network. This article analyzes the current situation of China's urban water supply network. Based on the problems of low information query efficiency and errors in network analysis processes, a water supply network WebGIS management system was developed based on database and GIS technology. The system has a total of 17 functions divided into five modules according to function type: display configuration, data queries, information statistics, network analysis, and map printing. The system uses a spatial database to solve the problem of processing complex network information, and its query function can quickly search for network information. By setting conditions, data filtering can be achieved, greatly improving the efficiency of information retrieval. This system uses GIS technology to visualize the water supply network and provides various click events, making the system interactive and improving the efficiency of information retrieval. In terms of spatial analysis, this article found that the water supply network can be represented by a graph, and algorithms from graph theory can be used to search for pipelines and nodes in the network. Therefore, this system has implemented two major functions of connectivity analysis and valve closing analysis in the network analysis module using Dijkstra's algorithm and breadth-first search algorithm respectively. This system can bring great convenience to the daily maintenance of the water supply network and reduce the error rate of maintenance work. Relevant departments of the government can achieve efficient management of the urban water supply network through the system's data query and network analysis functions.
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