DEVELOPMENT OF GIS-BASED MODELING PROGRAM FOR MINE RECLAMATION

This study presents a Geographic Information Systems (GIS)-based modeling program for the management of hazards in mine areas. The program was developed and integrated as an extension in the form of a toolbar within the ArcGIS environment using ArcObject and Visual studio.NET 2008. From the unified toolbar, it can provide a variety of analyzing functions such as mining-induced subsidence susceptibility assessment, decision support system to plan reforestation at abandoned mine, mine leachate transport modeling on the surface and designing of in-pit stormwater ponds. Interface of each module was designed according to the sequential procedures to implement modeling of each mine hazard. For the analyzing and evaluating of mine hazards using the program, various spatial data such as mine drift maps, subsidence maps, mine tailing dam maps, damaged forest zone maps, contour maps, borehole data were incorporated into program database. Raster-type digital elevation model (DEM) was used to extract topographical factors (i.e. slope gradient, aspect, curvature, depth to mine drift), hydrological characteristics (i.e. surface runoff, watershed), visibility index, universal soil loss value, etc. Abandoned mine sites including identified mine hazards were selected as a study area for the application of the developed program. Also, detailed field survey was carried out to validate the feasibility of the proposed software module. As a result, the software is expected to be valid for the general assessment to mine hazards prevention in early stage.