布古里沙漠边缘的沙丘崩塌和移动的研究

项目名称： 布古里沙漠边缘的沙丘崩塌和移动的研究

项目编号： No.11464022

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 周向玲

作者单位： 喀什大学

项目金额： 58万元

中文摘要： 沙漠向绿洲迁移，沙漠边缘的沙丘每年向绿洲平均移动约10米，沙丘背风坡的崩塌是造成的沙丘移动重要因素之一。沙丘是由沙粒颗粒物质构成的复杂体系，对沙丘颗粒体系的崩塌和移动规律的研究，不仅是物理学发展的一个重要部分，也是在沙漠的防治和绿化，改善生态环境上具有很重要应用价值。本项目拟结合野外实地观测、实验室实验和理论模拟计算，对布古里沙漠边缘的沙丘崩塌和移动进行研究。实地测量在有风沙流时沙丘的崩塌与风速、地貌环境的关系和移动的相关数据，在实验室研究沙堆崩塌的影响因素与沙粒粒径、堆积前期因素和堆积角等因素的关系，并结合理论模拟计算，得出沙丘移动的物理动力学机理。从而对颗粒物质沙丘的崩塌和移动的动力学规律有个较深的认识，力求给出能比较系统描述塔克拉玛干沙漠边缘的沙丘移动的主要的方法和关键参数，丰富风沙物理理论体系。

中文关键词： 颗粒物质；沙丘；崩塌；动力学模型

英文摘要： The desert migrate continually, about 10 meters oasis turn out to be desert every year. The collapse of leeward dunes is one of the important factors caused sand dunes moving. Dunes, consisted by sand particulate matters, is a complex system. Study collapse and movement law of dunes particle system is not only an important part of the development of physics, but also has a very significant value in the prevention and greening of the desert, improving the ecological environment. Combining field observations, laboratory experiments and theoretical simulation, the project intends to research on the sand dunes collapse and mobile on the edge of the Buguli Desert. In the field，we measure the dune sand collapse related data, such as wind speed, geomorphological environment and moving distance of dunes. In the lab, we study what effects sand particle size, sand accumulation antecedent factors and angle of repose have on the dune sand collapse. And then combined with theoretical simulations calculation, we obtained dunes move physical dynamics mechanism. Finally experimental compared, we can have a deeper understanding of the collapses of the particulate matter and dunes movement law. We strive to come up with a mainly method，which can systematic describe sand dune movement and the kinetic parameters of the sand dune movement. So that the theoretical system of the sandstorm physics research will be enriched.

英文关键词： particulate matter;dunes;collapas;dynamics