塔克拉玛干别里库姆沙漠根管砾幕形态格局及其在荒漠化监测中的应用

陆生高等植物死亡后，在漫长的地质演化过程中形成植物根管，植物根管在外营力作用下风蚀成根管大颗粒，成片的根管大颗粒在沙漠中形成根管砾幕，这一新的风沙地貌类型广泛分布于塔克拉玛干别里库姆沙漠腹地。本研究以塔克拉玛干别里库姆沙漠为研究区，以根管砾幕为研究对象，运用风沙地貌学、自然地理学、地理信息空间分析和遥感影像分析方法，将野外考察采样和室内实验分析相结合、定性研究与定量分析相结合、理论分析与应用实践相结合，研究根管砾幕的形态特征、空间分布与区域风沙环境之间的关系，研究根管砾幕形成的物质基础和动力条件，通过综合对比探讨区域生态环境变化与根管砾幕的形成演化过程，结合区域土地荒漠化防治应用实践，研究根管砾幕在干旱区土地荒漠化治理与评价中的作用。目前，关于根管砾幕的相关文献非常少，故本研究的开展将补充我国干旱区根管砾幕的研究，其成果将对沙漠古环境演变及沙漠腹地的固沙研究意义重大。

Root canal gravel is a kind of wind-accumulated landform. In arid desert area, after the death of terrestrial higher plants, the root canals of plants were formed by in the long process of geological evolution. And the root canals of the plants were eroded by the wind and sand to form large particles on the surface of the desert. Then the large particles form a root canal gravel in the desert. This new type of aeolian landform is widely distributed in the Taklimakan Belikom Desert. However，the research on root canal gravel is nearly blank in the research field of wind-accumulated landform. So This project will focus on the root canal gravel of Belikum Desert in the West of the Taklimakan Desert and research mainly in two aspects。First，the project will research mainly on the form characteristics、spatial distribution、formation conditions and the relationship between environment and root canal gravel of Belikom Desert by the analysis method of Aeolian geomorphology、physical geography and remote sensing. Second, the research will study in the role of root canal gravel in arid region soil erosion and land desertification monitoring through the comparison of the regional ecological environment change and the development of root canal gravel. At present, it is barely to see the research studying about root canal gravel，so the research will complement the study of wind-accumulated landform.