The karst area in Yuejiaqiao of Yiyang City was investigated in this study. 6 kinds of evaluation factors including large collapse pits, small collapse pits, faults, groundwater movements, depths of covering soil and human activities were particularly considered. Based on the spatial analysis functions of the geographic information system (GIS) platform and the analytic hierarchy process (AHP), a weighted calculation on the grids of the above evaluation factors was conducted to acquire the zoning map of karst collapse risks. The assessment resu...
