Assessment of vegetative land cover change in Wujiang River Basin,Southwest China
【摘要】：Monitoring and assessing vegetative land cover change is important to resources management and the study of environmental changes. This paper, using the 1 km SPOT Normalized Difference Vegetation Index (SPOT/NDVI) (1998 - 2006) data in growing seasons (April-September), assesses changes of vegetative land cover in Wujiang River Basin (WRB), Southwest China from 1998 to 2006. The results demonstrate that vegetative land cover shows a slight trend of amelioration in general during thees 9 years. Especially in the southwest part of WRB, the vegetations improve greatly, while in the surrounding of Guiyang and Zunyi, vegetative land cover degrades or decreases. When analyzing the relationship between vegetation and its potential driving forces, such as climate and population factors, we find out that the changes of vegetations have no obvious links to climate variation, but they show correlation with the increasing population. These findings may serve as a basis for decision making with regard to land resource management and environmental protection.