关键词: 京津风沙源工程区, 沙漠化防治区划, 区划原则, 治理对策

Abstract:

Desertification control regionalization means based on the natural conditions and driving factors leading to desertification,severity of desertification and distribution of desertified land,dividing the area desertification occurs into different regions in order to take appropriate desertification control measurements in the regions according to the specific conditions. The program of desertification control in source area of the sand and dust endangering Beijing-Tianjin has been carried out from 2002. This area covers 75 counties (cities or banners) in Beijng,Hebei,Inner Mongolia,Shanxi and Tianjin,with an area of 460 thousand km² in which 101.8 thousand km² desertified. The principles for desertification control regionalization were formulated based on the analyses of driving factors leading to desertification and desertified land distribution. According to the principles,the source area of the sand and dust endangering Beijing-Tianjin was divided into six desertification control areas,I.e. degraded grassland area in the Ulanqab Plateau,degraded grassland area in the north of the Xilin Gol Plateau,desertified area in the Hunshan Dak Sandy Land,desertified area in western Korqin Sandy Land,the wind and water eroded area in the Bashang Plateau and the Yanbei Plateau,and water eroded area in Yanshan mountainous region. Rehabilitation countermeasures are suggested for the different desertification control areas.

Key words: source area of the sand and dust endangering Beijing-Tianjin, desertification control regionalization, regionalization principle, rehabilitation countermeasures