干旱区生态环境知识资源中心

The presented methodology for regional ground water analysis originally was developed for several case studies in the Jordan Valley for the specifics of semi-arid conditions. We further develop this methodology for hydrological modeling in particular combining(1)GIS based structural 3D modeling with (2)GIS based data management as a preprocessing tool for finite element analysis of hydrosystems. The 3D structural modeling is based on typical geological layer information. The topography of all geological layers is represented by contour maps based on which stratified finite elements meshes are mapped successively. The second new development within the scientific OpenGeoSys software is the integration of GIS data base information into the finite element analysis. By this way, e.g. information about complex soil systems can be incorporated into the set up of the corresponding finite element model for the soil compartment. As an application, we present a case study for the Meijang area with the focus on surface/subsurface water interaction and the recharge response from surface infiltration to groundwater with different time series discretization. The numerical model was implemented within the framework of the object-oriented scientific code OpenGeoSys.