Comparisons between Movement Speed of Main Types of Dunes:A Case Study of Desert Areas in Hexi Region of Gansu Province

• 作者: CHANG Zhaofeng DUAN Xiaofeng LI Ya SHI Xuegang WANG Qi ZHANG Dekui ZHANG Jinhu ZHU Shujuan
• 来源期刊: 景观研究：英文版
• 学科: 地球科学
• 年，卷（期）: 2016,（6）
• 页码范围: 36-40
• 页数: 5页
• 分类号: P931.3

摘要

In desert areas in Hexi region,11 barchan dunes,6 chains of barchan dunes,6 pyramid dunes,6 parabolic dunes and 6 accumulated sand-belts were chosen to study their movement speed based on images obtained by Google Earth in various periods.The results show that among the dunes,the movement of the barchan dunes was the fastest,followed by the chains of barchan dunes,and only the tops of the pyramid dunes swayed,while the parabolic dunes and accumulated sand-belts hardly moved forward.The higher the barchan dunes(or the chains of barchan dunes) were,the slower the movement was.On the contrary,the higher the pyramid dunes were,the faster the swing was.There was a positive correlation between the movement speed of the barchan dunes and the average wind speed of sandstorms.