RESEARCHES ON LAND USE CHANGE IN AREAS AROUND BEIJING BASED ON 3S TECHNOLOGY

Since the 1990s,climate has changed rather greatly in areas around Beijing.Of all the changes,the most prominent is the increasing sandstorm days in winter and spring.As has been pointed out by many experts,resources and environment are main factors responsible for forming a special kind of climate.In order to study characteristics of land use in areas around Beijing,a special research project was set up to investigate information on land use change and land degradation.This research was based on 3S(GIS,RS,GPS) technology.The regularity and characteristics of land use change and land degradation in areas around Beijing are also analyzed in this paper.