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HORQIN SANDY AREA DYNAMIC RESEARCH BASED ON THE THEMATIC CARTOGRAPHIC DATA BASE SYSTEM

Zhao Yongping Xu Bin ① Huang Fang ② Wang Yimou ③ (Institute of Remote Sensing and Geographic Information System,Peking University,Beijing,100871) ①(Department of City and Environment,Peking University,Beijing,100871) ②(Lanzhou  
A quantitative research on Horqin sandy area dynamic evolution has been done for more than thirty years, based on the thematic cartographic data base system of Horqin typic sandy area which has been established by themselves. Influenced by human activities the desertification developed very fast from the 1950's to the 1970's, and faster than before the 1970's to the 1990's. If reducing human interference or with the help of the people, the eco environment would be recovered again. And the research result will have an important effect on the general improvement and the eco environment recovery of Horqin sandy area.
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