Travertine landscape at Huanglong Scenic Area shows obvious degradation with the increasing number of tourists in recent years, which finds expression in such aspects as the drying up of the travertine pool, the declined travertine deposition rate and the accelerated algae propagation and travertine darkness. The results show that tourists’ activities have an impact on water quality in some degree and thereby affect the carbonate precipitation rate and algae growth. It is held that the enhanced permeability is caused probably by project blasting vibration and the declining of travertine density due to slowing precipitation rate.