The research on environmental change alongside the Ming Great Wall in Ningxia and Shanxi Province by remote sensing

The land degradation alongside the Great Wall made in Ming dynasty is always the one of problems concerned by government and scientists, but all of the researches about it are focused on the whole environmental change alongside the Ming Great Wall, while they are not considered the Ming Great Wallpsilas role in the process of the environmental change. So in this paper, we will further reveal the process of the environmental change alongside the Ming Great Wall based on Landsat TM/ETM remote sensing image. Finally we found some new phenomena of the environmental change alongside the Ming Great Wall including function of the Ming Great Wall in impacting on surrounding environment.