The bedrock of the GREAT BUDDHA, under the acid rain, received strong weathering at the average rate of 0.2 gr/h·m~2 and has been disintegrated about 2 cm thickness.

• 乐山大佛基岩；在最近30a酸雨的作用下；风化剥蚀作用强烈；平均速率在(0.；2g/h·m2)左右；被剥蚀厚度约2cm；并提出了相应的防治对策。