The geographical information system (GIS) has provided the effective tools to capture, store, manage, analyze and
express the spatial information. Gradually, the research region has included the dynamical mechanism and the spatialtime
characteristics of the geography process, transmission mechanisms, uncertainty (multi-solutions), predictability,
and so on. Corresponding, GIS modeling is one of hotspots of current GIS research. The paper is the embodiment of
GIS modeling methods applied to geo-simulation research. Also it provides the model support for the management of
the ground water resources. In this paper, the methods for constructing the ground-water conceptual model through 3D
stratum model are discussed. Firstly, the constructing method of delaunay triangulation with constraint conditions is
proposed, which is suitable to the ground-water flow simulation. Then stratum (or aquifer) multi-DEMs are completed.
Based on the multi-DEMs, the Su-Xi-Chan hydrogeological conceptual model is reconstructed by irregular Tri-prism. In
order to prevent dispersed irregular tri-prism voxels from disunity, the spatial index mechanism is established for
groundwater model. Finally, the 3D groundwater simulation model is integrated with GIS, which can provide data for
3D numerical simulation. The results indicate that the integration of 3D GIS and geo-analysis model be convenient and
can accelerate process simulation of geo-science.