青海湖湖东高大流动沙山的形成机理及其演变趋势初探

来源 :2013年全国地貌与第四纪学术研讨会 | 被引量 : 0次 | 上传用户:gxfcs
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  土地沙漠化是青海湖周最严重的生态环境问题之一。该区沙漠化土地主要分布在湖西北的鸟岛、湖东北的沙岛以及湖东的克土、下巴台地区,主要以新月形流动沙丘、流动沙山和半流动沙丘为主。湖东及东北部连绵分布的高大流动沙山(高80 m~147 m),具有狭窄的脊线和减削的丘顶,其对湖东公路和湖东北岸青藏铁路的影响甚大,也关系到青海湖周的生态、经济、交通和旅游效益。根据地球系统科学和环境演变基本原理,通过野外调查、风向与风速定位观测、沙丘移动与输沙量观测、样品室内分析测试等手段,探讨沙山的形成机理及演变过程;通过对“快鸟”等高清卫片影像资料应用“S”技术,结合实地定点定位观测,研究流动沙山移动情况。通过研究自然与人为活动影响下沙山的分布、动态变化与驱动机制以及演变趋势,以期为防治和合理利用本区高大沙山提供技术支撑。
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