期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：170
期号：2
页码：022124
DOI：10.1088/1755-1315/170/2/022124
语种：English
出版社：IOP Publishing
摘要：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 results are accord with the actual situation as a whole. On this basis, a second assessment was carried out regardless of groundwater movements. Therefore, the influence of groundwater movements on the distribution of karst collapse was analyzed by comparing the two assessment conclusions. The results show that the groundwater movement increases the area of risk zones by 16.4% and greatly changes the distribution of risk zones. Moreover, the groundwater movement increases the risk of the investigated area by 0.1% - 0.3% depending on geological conditions.
