| Wan huayan cave located in Beihu area of C henzhou,Hunan province.It's one of the famous tourist caves and developed earlier in our country.It has many kinds of the karst landscape types,but compared with other research relatively mature the south karst caves;the cave genetic research is scarcity.I had four times to Wan huayan cave from August 2015 to April 2016.In order to get a deep study on this issue;I had field geology investigation,then the cave's shape,structural characteristic has carried on the field observation,to obtain valuable basic data.Based on this basis,from the physical geographical and geological conditions,such as research,explore Wan huayan regional geomorphic characteristics and influencing factors of cave formation,analysis Wan huayan development evolution process.Based on the above research,this paper puts forward Suggestions to Wan huayan tourist resources sustainable development and protection;Explore the karst cave tourism development direction.Main cognitive is as follows:1.Wan huayan is still in the development of the underground river.Its scale is larger,the system consists of a main cave and a minor cave,and connect them negative terrain.To different degree of corrosion and erosion,cave can be divided into the cave's passage and speleogens.The cave's passage like gallery,partial section is canyon passage,cave chamber type,etc.Under the influence of corrosion and erosion,cave has four types of speleogens.2.Wan huayan regional terrain is South higher than North.Wan huayan cave system's development strike and its underground river flow direction are the same.Wan huayan cave's development and evolution affected by the development of the underground river evolution.But the scale of the underground river affected by factors,such as strata,lithology,structure,etc.Thus the genesis of the cave should consider its lithology,structure,al ogenic water,etc.3.In the Wan huayan cave's area,its lithology is mainly effected to with sediments in north,and magmatic rocks in south.Limestone and dolomitic limestone offer a material basis to Wan huayan cave's the development and evolution.At the same time,the rock of different lithology exist differences.Under the effect of allogenic water,their corrosion and erosion degree is also different.Thus its cave formation has been different.4.According to the measured the data,many fault controlled the Wan huayan cave's the morphology,structure and its extension in the main direction.Not only is that,many kinds of different fracture an important part of the internal with cave structure and external environment.It affects the cave sediments the development and evolution of the landscape.5.With strong corrosion and erosion ability of allogenic water has important significance at large cave development.The development and evolution of the cave are connected with the allogenic water supply.Wan Huayan modern Underground River mainly comes from Tiekeng reservoir downstream at the southern.And the branch cave originated in granite and carbonate rock contact zone.Then its underground river flow the karst region fall into the cave.6.Wan huayan development and evolution of the cave system experienced two-stage,namely the main cave of development and branch cave of growth.Wan huayan main cave has a long history,and its growth begins with swallet stream stage of the development.Branch cave of growth phase is due to tectonic uplift and subsidence,with declining drainage datum,and the ground began to leak in phase.Depressions,doline,sinkhole,and insurgence what are a large number of developments.Thus surface water is also gradually penetrate into the ground,and began to formation and development of branch cave.Then Heiyan karst window and He shangyan tiankeng had been collapsed,coupled with the decrease of precipitation,river diversions.Led to the surface water into the main cave were greatly reduced,carrying granite sand gravel ability was abate,so that branch cave development speed was accelerating.The distribution of clastic sediment in the cave also reflects the different periods of the strength of the underground water's hydrodynamic force conditions.It also can be concluded that the main cave and branch cave growth phase.7.Wan huayan cave landscape is greatly influenced by underground river development and evolution.Both erosion-corrosion landscape and speleothems landscape development are more at modern main cave and branch cave downstream.Distribution of the cave landscape has a close contact with allogenic water and the cave morphological structure.8.For Wan huayan cave tourism sustainable development,at this stage to do the following work: maintenance of cave structure stability,regular observation inside the cave form structure;strengthen the management of the scenic area,to avoid the destruction of the human factors of cave resources;Writing science popularization of tour guide presentation with personal characteristics,the traditional cave tour description models change into popular science knowledge of participatory tour description.In short,to the cave environmental bearing capacity range,to effectively protect its cave resources;make Wan huayan cave tourism in the traditional mode change to the popular science participation under the model of sustainable development. |
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