摘要
库姆塔格沙漠像一把扇子覆盖在了阿尔金山山前的倾斜平原上,沙丘类型复杂,而尤以羽毛状沙垄最为独特成为我国独有的沙丘形态。有关羽毛状沙垄形成发育机理研究,近几十年来进展甚微。通过野外观测、高精度航片解译和风洞模拟实验研究,结果表明:羽毛状沙垄形成条件是:①具有广大平坦倾斜的地面。②地表沙物质不甚丰富。③两组相近风向是其形成动力条件。④舌状沙丘是在新月形沙垄形成之后的次一级沙丘形态。二者组合成羽毛状沙垄。羽毛状沙垄形成过程可以归纳为下列图式:新月形沙丘→新月形沙垄→舌状沙丘→羽毛状沙垄。
Kumtag Desert, like a fan, covers on the inclined plain in front of Altun Mountain. There distributes many kinds of complex sand dunes, among which feather-shaped sand ridge is the unique sand form in China. The literatures on the formation and development mechanism of feather-shaped sand ridge are scarce in recent ten years. The authors has conducted field observation, aerial photograph interpretation and simulation experiment in wind tunnel, it was found out that the forming factors of feather-shaped sand ridge are as follows： ① extensive inclined plain, ② non-abundant sand materials on surface, ③ winds in two similar directions as dynamic condition, ④ tongue-liked sand dune is the sub-form of barchan sand ridge. Both tongue-liked sand dune and barchan sand ridge combine the feather-shaped sand ridge. The developing process of feather-shaped sand ridge can be summarized as the follow stages： barchan sand dune→barchan sand ridge-→tongue-liked sand dune→feather-shaped sand ridge.
出处
《中国沙漠》
CSCD
北大核心
2007年第3期349-355,共7页
Journal of Desert Research
基金
国家自然科学基金项目(40671021和4997013)资助
关键词
库木塔格沙漠
羽毛状沙丘
形成机理
Kumtag Desert
feather-shaped sand ridge
formation mechanism
