Occurrence and Temporal-spatial Distribution Characteristics of Geological Hazards in Rongxian County in Southeast Guangxi Zhuang Autonomous Region
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    Abstract:

    [Objective] The occurrence condition of geological hazards was analyzed in order to provide a scientific reference for the prevention and control of regional geological hazards in Rongxian County, Guangxi Zhuang Autonomous Region.[Methods] The occurrence and temporal-spatial distribution features were analyzed by adopting a statistical method based on the detailed data of field surveys over the past ten years.[Results] There were 4 types of geological hazard:landslide, collapse, unstable slope and debris flow. Their occurrence scales were small, and occurrence rates accounted for 40.57%, 26.87%, 32.30% and 0.26% of the total hazards respectively. The movement ways were tractive in the landslide, tractive and sliding in the collapse. The unstable slope manifested three types:partial collapse slope, partial erosive slope, and high steep slope. Geological hazards were significantly influenced by local heavy rainfall and typhoon rainfall, and concentrated in the period of June and August, having time lag effect and always happened suddenly in summer rainy season. The geological hazards distributed in the whole region but happened more frequently in some townships. Most of the hazards occurred in low hilly region and granite region, and presented a local linear distribution along the geological structural belt. However, the geological structure had no remarkable impact on these geological hazards.[Conclusion] The occurrence and distribution features are influenced by three aspects, including types of rock soil mass, rainfall and human engineering activity.

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文海涛,韦朝华,廖丽萍,杨云川,赵艳林,马少坤,陈立华.桂东南容县地质灾害发育与时空分布特征[J].水土保持通报英文版,2017,37(5):182-188,197

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History
  • Received:April 08,2016
  • Revised:August 31,2017
  • Adopted:
  • Online: November 14,2017
  • Published: