京津风沙源工程区沙漠化防治区划与治理对策研究

对京津风沙源工程区沙漠化影响因素和沙漠化土地分布进行分析,提出制定沙漠化防治区划的原则,并对该地区进行沙漠化防治分区,提出不同区域的沙漠化防治战略对策.根据气候分区、植被和土壤的分布、地貌类型以及沙漠化土地分布情况,将京津风沙源工程区划分为6个治理区,即乌兰察布高原退化草原治理区、锡林郭勒高原北部退化草原治理区、浑善达克沙地沙化治理区、科尔沁沙地西缘沙化治理区、坝上高原-雁北高原风蚀、水蚀治理区和燕山山地水蚀治理区.

Desertification Control Regionalization and Rehabilitation Countermeasures of Source Area of the Sand and Dust Endangering Beijing-Tianjin

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.