不同气候带的河道与沙丘分布格局及其类型划分

发布时间：2018-03-12 08:44

本文选题：河道　切入点：沙丘　出处：《中国沙漠》2017年05期 　论文类型：期刊论文

【摘要】：风水交互作用是干旱区常见的地貌现象和重要的地表过程,干旱区河流通过提供物源和场所控制沙漠分布的格局,沙漠分布与风沙活动制约河道发育和泥沙输移,在不同时空尺度表现不一,但关于二者交互作用的分类处于探索阶段,尚未形成分类体系,尤其在地貌格局分类上多为定性描述。因此,自西向东选择位于3个气候带的中国西部克里雅河、中部毛不拉格孔兑以及东部西拉木伦河,利用遥感影像解译获取河道与沙丘信息,探讨近源沙丘的分布与河型之间的组合关系。结果表明:河型、河流流向与风向之间的关系、水文以及距离河道的远近影响河道与沙丘组合的地貌格局;在河道—沙丘尺度上,划分为弯曲河道—对称式边滩沙丘、顺直河道—边滩沙丘、分汊河道—心滩式沙丘、网状河道—格状镶嵌式沙丘4种类型。
[Abstract]:Geomorphological interaction is a common geomorphological phenomenon and an important surface process in arid areas. Rivers in arid areas control the pattern of desert distribution by providing material sources and places, and desert distribution and wind-blown sand activities restrict river development and sediment transport. But the classification of the interaction between them is still in the exploratory stage, and the classification system has not been formed, especially in the classification of geomorphological pattern. From west to east, the Creya River in western China, the Maobolagkontwe River in the central part of China and the West Lamuron River in the east of China are selected. Remote sensing images are used to obtain the information of the channel and sand dunes. The combined relationship between the distribution of near-source dune and river type is discussed. The results show that: the relationship between river type, river flow direction and wind direction, hydrology and distance from river channel affect the geomorphological pattern of channel and sand dune assemblage, and on the scale of river and sand dune, It can be divided into four types: curved channel-symmetrical beach dune, straight river-beach dune, braided channel-core beach dune, reticular channel-lattice inlaid sand dune.
【作者单位】：陕西师范大学地理科学与旅游学院;北京师范大学减灾与应急管理研究院/地表过程与资源生态国家重点实验室;
【基金】：国家重大科学研究计划项目(2013CB956001) 国家自然科学基金项目(41171003) 中央高校基本科研业务费项目(GK201703047)
【分类号】：P931.3;TV147

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