Yunnan and Guizhou are two provinces in Southwest China where in recent years drought disasters have occurred due to natural and human factors. This paper reviewed literature and summarized the relate
Pavement snow and icing are worldwide problems,but effective countermeasures are just beginning to be developed in China.The two most common snow and ice removal methods are mechanical clearance and c
The normalized difference vegetation index(NDVI)is used extensively to describe vegetation cover and ecological environment change.The purpose of this study was