Development And Protection Of Danxia Landform Geological Relics In Jianmenguan Area

Jianmenguan Geopark is located in the south of Jiange County,Guangyuan City,Sichuan Province,on the northwest edge of the Sichuan Basin,and the southeast edge of the Longmenshan nappe structure.The colorful Danxia landforms in the scenic spot are the most characteristic and important tourist resources.Due to people often pay more attention to the development and utilization of it's historical culture and the exploitation and protection of the Danxia landforms has been neglected,many Danxia landforms have been destroyed.Taking the Jianmenguan Geologic Park as the object of research,the article discusses the classification of Danxia landforms,the types of landscape features and the causes of formation on the basis of predecessors' studies.And useing ArcGIS to extract and analyze the terrain factors of the study area,the sensitivity map of the scenic area is obtained.On this basis,the author propose development suggestions and protective measures.Through the above analysis and research,the paper draws the following conclusions:Firstly,the formation of Danxia landform is formed under the interaction of internal and external dynamics.The internal dynamic process mainly consisits of the following the three period: the nappe tectonic movements of Longmenshan area in Sichuan Province during Jurassic period;Sichuan movement and Himalayan movement acted on the Jianmenguan area in Miocene Epoch period;During the Quaternary period the Tibetan Plateau began to rise and the Sichuan Basin gradually formed under the influence of the Himalayan movement.During the Quaternary period,the tectonic movement of Longmenshan became more intense,and the crustal uplift of the area began to be subjected by external forces,such as water erosion and incised,gravity,weathering denudation,and so on.Based on the genesis of Danxia landform,the Danxia landform in Jianmenguan area is divided into two types: fluvial erosion and wind erosion.According to the color and morphology of Danxia landscape,it is divided into red cliff class,large wall peak cluster,cave type,modelling peak class and other types.Secondly,this article extracts and analyzes the influence factors of the study area,such as elevation,slope,slope direction and so on through the GIS technology,and generates the sensitivity zoning map of the four level scenic spots.By overlaying the scenic spot and road with the sensitivity zoning map of the scenic spot,we can see from the map that most of the scenic spots are located in the second-level sensitive areas,and a few are located in the first-class sensitive areas.We should strengthen the protection of the scenic spots located in the first-class sensitive areas to prevent them from damage,causing damage to the scenic spot.In the first-levelsensitive areas,the buildings will be strictly controlled,and tourists will be reasonably set up to visit the walkway and the tourist lanes,so as to maintain the visibility of the scenic spots,and provide tourists with better visual enjoyment.The amusement park,leisure areas and other functional areas are arranged in the second and third sensitive areas.In the four sensitive areas,some large projects can be built appropriately.Finally,the paper analyzes the problems existing in the current tourism development in Jianmen Guan area,and puts forward some countermeasures and protection suggestions.Aiming at the problem of upgrading scenic spot,we should speed up the relevant work of applyment for the national geopark in jianmenguan scenic spot to raise the level of scenic spots.For the issues of mining and utilization the value of geological relics of scientific research and science popularization,We will increase the use of scientific research to explore the value of geological science heritage and expand the value of geological relics to launch geoscientific tourism routes.Visitors are offered a chance to receive education while visiting.For the landscape formed by fluvial erosion,we should do a good job of drainage to reduce the damage of the landsacape caused by the erosion of water flow.For the Danxia landscape threatened by gravity factors,strengthening the weak structural surface,strengthening the structural body,improving the mechanical balance and enhancing the stability by means of retaining,anchoring,cutting low slope,etc,the landscape are protected.The landscape under wind erosion can be planted around the landscape with trees and shrubs to reduce the wind force;we should strengthen the warning signs for the landscapes that are accessible to tourists.We should set up protective fences for important Danxia landscapes to Prevent visitors from destroying them and control the number of visitors when necessary.