Abstract:In recent 20 years, the flow of spring water in Jinan city is gradually exhausting and spring water breaks out. In order to protect the spring water, restore the spring flow, and shape the image of Ji'nan city, based on the groundwater exploration, test and research results in 50 years, effective management of multisource, massive, multiperiod, multiscale and heterogeneous geological data has been realized, professional models of different geological data have been established, threedimensional visualization of the spatial and temporal distribution characteristics of the model has been realized, and professional processing and analysis of the model have been carried out. The accumulated spatialtemporal relationship reflects the temporal and spatial variation law of groundwater. Finally, based on the twodimensional and threedimensional hydrogeological conceptual model, adding the time dimension, temporal and spatial variation law of urban groundwater in Jinan has been reflected from the timespace relationship of historical accumulation. The embedding of groundwater dynamic monitoring data has been realized on the basis of threedimensional geological model, and form the fourdimensional groundwater geological information system in its space. On the basis of spatial representation, the formation logic of urban groundwater, the distribution, origin, evolution of spring water, the reasons for spring water cutoff and the countermeasures for water supply protection have been introduced. It can guide the protection and development of urban groundwater and provide references for government decisionmaking.
