豫北黄河古道区风沙地貌特征

通过航片判读和实地考察,分析了豫北黄河古道区沙地分布特征,从形态成因角度对风沙地貌形态类型进行了划分。中生代以来华北平原隆起与凹陷呈NNE向相间分布的构造特点,对沙地形成与分布格局具有控制作用。风蚀地貌类型单一,形态简单,风积类型较为多样。风积地貌高度一般不超过10m。沙地及风沙地貌形成是典型风水两相作用之结果。由于生物气候条件和沙源状况的限制,风沙地貌发育规模具有一定的局限性。

THE CHARACTERISTICS OF AEOLIAN SANDY LANDFORM IN ANCIENT YELLOW RIVER COURSE AREA AT NORTHERN HENAN PROVINCE

By aerial photograph interpretation and field expedition, the sandy land distributing regularity in ancient Yellow River course area at Northern Henan province was analysed and the sub types of aeolian sandy landform have been divided from shape genesis angle. Controlled by the geological structure of rise and depression inter distributing in NNE direction, the types of wind erosion landform exist no difference, while that of wind deposition are various. In the development of aeolian sandy landform, wind and water functions take place alternatively. The scale of aeolian sandy landform development was limited by the bio climatic condition and sand source. The heights of wind doposition landform are no more than 10 m in general.