As a result of the existence of slope face, the upper material of karst country (especially efflorescent carapace and soil, moisture) have bigger instability, the environment is very weak.

• 由于坡面的存在,喀斯特山地的地表物质(尤其是风化壳及土壤、水分等)具有较大的不稳定性,环境十分脆弱。