Disaster Risk of Landscape-Rockfall in Danxia Landform of Kongtong Mountain

摘要

Kongtong Mountain national geopark is characterized by Danxia landform. Lots of strange shaped unstable rocks emerged in the Danxia landform areas, not only do they have great ornamental and aesthetic value but also are potential geological disasters. During the formation process of landscape-rockfall, differential weathering, water erosion, biological deposition, freezing thawing and chemical element migration are contributed to the fantastic shapes. While human activities, earthquake, gravity unloading and root splitting are the major reasons for the failures. The complicated geological environment makes the main scenic spots of high risk, so the protection and management of unstable rocks is very important to the development of the geopark, but it is also a big challenge due to the high technical difficulty. To collect comprehensive information of the stability of unstable rocks, detailed investigation should be conducted and all-time digitalized monitoring facility on the stability should be equipped on major spots. Moreover, the irreversibility and the generation of secondary geological disaster during damaging process as well as the development sustainable problems of prevention and protection should be taken into particular considerations.