关键词: 神府东胜煤田, 土地沙漠化, 成因分析, 历史演变, 发展趋势, 防治对策

Abstract: Based on the field investigation, mapping depending on the time-lapse remote sensing images, sand sampling and analysis, short-term surveying and measuring of the windblown sand, wind tunnel simulating of different soils and calculation, this dissertation dealt with desertification of the Shenfu-dongsheng coal field, which lies in the southeast Ordos plateau. The results show that the desertified lands are 37990.21km², about 72.9% of the total research area. Both natural and anthropic factors causing desertification are analyzed.According to strata records and C dating, 10³ yrs quasiz-cyclic evolution of dry and wet climate changes since 10480 a.B.P are found. The luxuriant steppe stages were 10480, 8000, 7000-7500, 6000-6500, 5000-5500, 3500-4000, 2000-2500, and 1000-1500 a.B.P respectively when the dunes were stabilized in large scale. 290, 130, 50, 35, 14, 7 and 3yrs, quasi-cyclic of dry and wet changes are also found by cyclic graph and energy spectrum analysis. Periodic desiccation have been combining the irrational anthropic activities to cause land desertification. Intensity of wind erosion would increase by 3.5-15 times in the first construction period if the intervention of coal mine developing were not brought under control.