关键词: 坝上高原, 沙漠化, 风蚀——风积

Abstract: The present land desertification has been developing rapidly. From 1975-1987, the desertificd land spread 2085sq. km. , increassd by 6.89% annually in Bashang plateau, Hebei province. During last four decades, the climatic change in studied area was not obvious and no directional changing tend can be found, but the human economic activities have increased continually. Under the semi-arid climatic condition, the process of desertification was caused mainly by the over-reclamation and overgrazing, and resulted in the decline of biomass productivity and the loss of land resources through wind erosion.