| Taihang Mountain Grand Canyon is located 36km to the east of Huguan County,Shanxi Province.It has the titles of"national 5A scenic spot","National Forest Park"and"National Geopark".Hongdou Gorge Scenic Spot is one of the main scenic spots of Taihang Mountain Grand Canyon.It is located in the middle of Taihang Mountain Grand Canyon,with an area of about 6.7km~2.It has excellent ecology,cool and moist climate,numerous ponds and waterfalls,rich landscape and beautiful scenery,attracts about 350000 tourists every year with its high tourism value and scientific value.The special geological environment not only endows Hongdou gorge with high tourism value,but also leads to a lot of potential collapses to occur occasionally.These geological disasters pose serious threats to the tourists'personal safety,tourism resources and facilities,and local residents'life.Based on the project of"Investigation and evaluation of geological environment of typical tourism resources in Shanxi Province",this paper selects Hongdou Gorge Scenic Spot,one of the main scenic spots of Taihang Mountain Grand Canyon in Huguan County,as the research area,and takes"geological disaster risk assessment of Hongdou Gorge Scenic Spot of Taihang Mountain Grand Canyon"as the research content.On the basis of systematic collection of relevant results,a detailed survey of the Hongdou Gorge 1:2000 geological disaster was carried out.On this foundation,the distribution and development characteristics of geological disasters in the study area are systematically analyzed.Finally,by using relevant research methods to carry out research on the dangerous and vulnerability of geological hazards based on the Arc GIS platform.In this way constructing the risk zoning of geological hazard.The main research content and conclusions obtained are as follows:(1)Based on the 1:2000 detailed survey of geological disasters in Hongdouxia Scenic Area,there are 129 geological disasters in the study area,of which 105 are collapses,including 1large-scale,30 medium-scale and 74 small-scale;24 landslides,including 10 medium-scale and 14 small-scale.(2)By analysing and summarizing the distribution and development law of geological disasters in Hongdou gorge,it is considered that the geological disasters in Hongdou gorge are characterized with derivative,group—occurance,suddenness,regionality.and periodicity.(3)Select typical dangerous indicators from the three aspects of geological disasters,main control factors and inducing factors.Based on the GIS platform,carry out the risk analysis of the geological disasters in the Hongdou Gorge Scenic Area,Finally,the scenic area Geological hazards are divided into four risk zones:extremely high,high,medium,and low,account for11.5%,21.3%,30.6%,and 36.6%of the scenic area respectively.(4)Select relevant vulnerability indicators from the three aspects of population,material,and economy in the study area to analyze the vulnerability of Hongdouxia scenic area to geological disasters.Finally,divided the scenic area's vulnerability of geological disasters into extremely high,high,medium,and low,accounting for 6.1%,19.6%,5.1%,and 69.2%of the scenic area respectively.(5)According to the formula:risk=dangerous*vulnerability,grid calculation is carried out under the Arc GIS platform,and divided the scenic area's risk of geological disasters into extremely high,high,medium,and low,accounting for 7.8%,20.3%,and 33.4%,38.5%respectively.(6)Select typical single—body collapse geological disasters in high—risk areas in the study area,and use Rocfall and Arc GIS software to carry out its risk assessment combined with field surveys.Finally,the threatened area of single collapse is divided into high,medium and low risk areas.(7)Based on the analysis of the characteristics of geological disasters in the study area,combined with the needs of tourism development planning,a suggestion of"passive prevention and control as the mainstay,active prevention and control as supplement"is proposed for the prevention and control of geological hazards in the study area.By carrying out the risk assessment of the Hongdou Gorge Scenic Spot in the Taihang Mountain Grand Canyon,it has enriched the research fields of geological disaster risk in the Taihang Mountain area.At the same time,it can provide an important reference for disaster prevention and mitigation,and provide important information for the development and planning of the scenic spot. |
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