In this paper, according to detailed investigation of geological disasters, we firstly generated preliminary geological hazard susceptibility zoning based on geological disasters points' density on the GIS platform. Secondly, we classified the internal factors of geological hazards such as lithology, terrain slope, landform types, vegetation coverage rates, and multi-annual rainfall and so on. Then we covered the classification of internal factors to the preliminary geological hazard susceptibility zoning and generated the geological hazards meteorological early-warning based map. And, respect rainfall as the dominant external factors of geological hazards, we rezoned the geological hazards meteorological early-warning map in Jingchuan County. Finally, we employed the critical-day synthesized criterion of precipitation method in the key and secondary warning zones of Jingchuan County. Good prediction results were obtained through the actual test, which indicate that, being simple, practical and effective in the actual situation of the area, it can provide a scientific basis for the further study of geological hazards meteorological early-warning in the Loess Region of eastern Gansu Province.
DING Weicui, YANG Qiang, WANG Aijun, GAOYoulong, YANG Xiuyuan, LI Qiang
. Study on and Application of Geological Hazards Meteorological Early-warning in the Loess Area: A Study in Jingchuan County in Eastern Gansu Province of China[J]. Journal of Geo-information Science, 2011
, 13(6)
: 811
-818
.
DOI: 10.3724/SP.J.1047.2011.00811
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