辽宁省地质灾害时空变化特征

doi:10.3969/j.issn.1673-503X.2017.05.009

Abstract

Abstract: Based on the historical data of geological disaster investigation from 2005 to 2015 in Liaoning province,the composition and spatiotemporal characteristics of different categories of geological disasters such as debris flow,landslide,rockfall,ground subsidence,and the different levels (extra large,large,medium,and small) of geological disasters in Liaoning province were analyzed.The categories,intensity,hazard-prone areas and high incidence periods of geological disaster in Liaoning province were finally summarized.The results show that the geological hazard in Liaoning province is characterized by great variety,wide distribution,high frequency and large intensity.The types of geological hazards are mainly involved landslide and debris flow,and the level of geological hazards is usually small.Although geological disasters occur every year from 2005 to 2015,their annual occurrence numbers vary greatly.The period of high incidence concentrates from May to August,with the largest occurrence frequency and worst influence in August.Geological disasters occur mostly at the ravines on either side of the ridge and plains or hills in Liaoning province and occur most frequently in Dandong.Landslides and debris flow mainly occur in countries while rockfall and ground subsidence usually occur in urban areas.This work would be beneficial to understand the characteristics of geological disasters in Liaoning province and provide a reference for the meteorological risk early-warning of geological hazards.

Key words: Geological hazard, Disaster type, Disaster level, Prone area, High incidence period

CLC Number:

P458.3
X51

CHEN Chuan-lei, GUAN Zhao-yong, CHENG Pan, XIAO Guang-liang, SUN Hong-yu, KOU Ying-jie. Spatiotemporal characteristics of geological hazard in Liaoning province[J]. Journal of Meteorology and Environment, 2017, 33(5): 68-75.

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Spatiotemporal characteristics of geological hazard in Liaoning province

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