Abstract: In view of the complexities of urban underground pipelines and the insufficient level of information about the part of pipelines for water quality monitoring, the visualization early warning system of urban underground pipelines about water quality has been developed with the SuperMap which has the powerful three-dimensional graphics capabilities. In this system, the three-dimensional visualization of the scene, the pipes model, the monitoring results and the SuperMap system were combined together, and the three-dimensional scene of urban underground pipelines was built visually and effectively. The information of visualization model can be displayed dynamically and queried interactively in real time. Meanwhile, the system automatically identifies abnormal index value of monitoring instruments by setting up the thresholds of water quality monitoring indicators, and pushes abnormality information to monitoring persons, so as to achieve the purpose of monitoring and early warning. Therefore the system provides an intuitionistic and interactive visualization management and security control platform for urban underground pipelines, which has some practical meaning and application values.

Key words: urban underground pipelines, water quality monitoring, SuperMap, visualization, early warning