窟野河流域河岸沙丘地貌格局及变化

风水交互作用是黄土高原北部风蚀水蚀交错带特殊的侵蚀营力，并致该区土壤侵蚀强度加重。以毛乌素沙地窟野河流域作为研究区，基于影像解译及数理统计方法，研究河道与沙丘交互地貌过程。结果表明：（1）窟野河“三河夹沙”区沙地以河流为中心呈现出对称条带状格局分布，距离河流，依次呈现出流动沙丘、固定半固定沙丘、丘陵沟壑区的空间格局；（2）典型河段河道与沙丘空间格局呈现出河道穿越流动沙丘、河道两侧斑块状沙丘镶嵌分布、两河交汇处流动沙丘分布等3种格局；（3）河道弯曲系数与河道两侧沙丘活动性的变化之间呈现出一定的对应关系。

Landscape Pattern and Variation of Riverine Sand Dunes in the Kunye River Basin,China

Aeolian-fluvial interaction is a particular erosion process in the region of the Northern Loess Plateau where wind-water soil erosion is significant. Taking the "sandy river delta surrounded by 3 rivers" at the upstream of Kuye River as the study area, this research adopt remote-sensing image analysis and mathematical statistics methods to study the interactive landform process between the river and the dune. The main conclusions are as follows:(1) "Sandy river delta surrounded by 3 rivers" of the Kuye River show a circular pattern centered on the river. The distances from the rivers are in turn showing the space of mobile dunes, fixed semi-fixed sand dunes and hilly gully regions. (2) The spatial pattern of rivers and dunes in typical river reaches shows three types in which the river passes through dunes, the mosaic distribution of patchy sand dunes on both sides of the river, and the distribution of moving sand dunes at the junction of two rivers. (3) There is a corresponding relationship between the bending coefficient of the river and the changes of the dune activity on both sides of the river.