Research On Character And Protection For Landscape-rockfall Of Danxia Landform In Long-HuShan

Scenic spots in mountain area of China have universally pretty rockfall calledlandscape-rockfall, for its value of the visual, infectious, unique, magic value of tourismand aesthetic appreciation. These are the geological heritage obviously, as there are scarce,precious, fragility and non-renewable. However, some problems of landscape-rockfall existin tourism developing and protecting the geological heritage of scenic spot of mountainregion, so it is prominent that studying landscape-rockfall is increasingly urgent andimportant. Furthermore, depth studying unstable rock landscape features will be good forthe wonderful and elegant grand rockfall to play tour value and lessen danger, thismatching the strategy of sustainable development of every scenic spot and producing theenormous social effect in the future.Danxia landform is one of major scenic landscape, and its theoretical research andexploitation had yielded fruitful achievement. There are often complex terrain, steep slope,(sandstone, conglomerate, mudstone, etc.) less mechanical strength of lithology (sandstone,conglomerate, mudstone, etc.), many vertical joints in the areas of Danxia landform, whichis prone to develop rockfall. It is especially obvious in Danxia landform that geologicallandscape coexist with dangerous rocks. In the process of Developing Danxia landformtourism, there are some issues in cognizing and protecting landscape-rockfall, but nowpeople pay insufficient attention to them.Mt.Longhushan where Danxia landform landscape are a specially characteristic is alarge geo-park,10km far from Yingtan city, which located in northeast of Jiangxi Provincein China. The layer forming Danxia landscape in Mt.Longhushan mainly make up fromsandstone, conglomerate, mudstone. Because of steep cliffs, intricate joints, the areadeveloped a number of peculiar shape rock that have the value of prominent tourism andaesthetic appreciation. Landscape-rockfall undergo a long term revolution of geologicalprocess，and was caused by many internal and external geological actions. The mainfactors are topography, lithology, geological structure，hydrogeological conditions and thecarved-erosion action (including erosion and dissolution, the weathering in differenttemperature, micro-chemical weathering). Carved-erosion played the core role in theprocess of forming landscape-rockfall.From the perspective of sustainable development, and according to the stability,Danxia landform landscapes are divided into landscape-rockfall and stable landscape.Based on size, morphology, instability mode, tourism value and risk, landscape-rockfall can be briefly classified many kinds. Surveying the features and tourism development ofMt.Longhushan Danxia landscape, the paper divides its types, and discusses thesustainability development of landscape-rockfall. Lastly, it analysis the development ofpotential threats and put forward some measures to protect landscape-rockfall.Utilizing theory of the analytic hierarchy process, this paper establishes the evaluatingsystem of landscape-rockfall, containing two aspects of rockfall and landscape, and its nineappraisal factors. Besides, this evaluating system assigns value to factors and divides therank of landscape-rockfall. Utilizing the evaluating system of fragile geology landscape toevaluate the30representative landscape of Danxia-landform in Mt.Longhushan, the resultfits investigation.On the basic of practical investigation, we evaluated the stability of rockfall with thequalitative and quantitative method, and according to field topography, judged the riskscope of the instability of Landscape-rockfall. Furthermore, we analyzed the happeningpossibility and easy-happening degree of Landscape-rockfall hazards, and then thecomprehensive exponential evaluation methods of multivariate intercomparison and expertestimation were adopted to devise the risk of Landscape-rockfall of Danxia Landform inLonghushan.Landscape-rockfall of Danxia Landform in Longhushan has become importmentresources for tourism, but as their poor stability can restrict the tourism development, weshould strengthen the protection of them.Landscape-rockfall disaster prevention ought tofollows the five principles of nondestructibility, approximability, reversibility, nointerference and compatibility. According to the present technology of preventing rockfalland the particularity of landscape-rockfall, the text proposed a hang-pull method that madeby the rope, cable, etc. to provide some upward pull to make the unstable rock meet therequired coefficient of stability. The hang-pull method has many advantages of wideapplication, simple theoretical calculation, better improving stability coefficient,convenient construction, easy maintenance and easy follow-up monitoring, etc，and it issuitable for protecting rock landscape.