Study on the Drought and Flood Disasters Formation Mechanism in Karst Regions of Middle Guangxi

Precipitation and groundwater resources are abundant in the bare karst areas of Guangxi, China. But droughts and floods are frequent and serious due to the natural and human factors. Comprehensive analysis shows that drought and flood disaster in karst areas of Guangxi is the results of climate, karst geology and human factors. This paper will firstly analyze the common factors of droughts and floods, then make a discussion on the special geology and geography factors of karst area, finally, reveal the formation mechanism of drought and flood disasters in karst area. (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Society for Resources, Environment and Engineering