中国沙漠 ›› 1987, Vol. 7 ›› Issue (3): 29-40.

• 论文 • 上一篇    下一篇


王颖, 朱大奎   

  1. 南京大学大地海洋科学系
  • 出版日期:1987-09-20 发布日期:1987-09-20

An Approach on the Formation Causes of Coastal Sand Dunes

Wang Ying, Zhu Dakui   

  1. Department of Geo and Ocean Science, Nanjing University
  • Online:1987-09-20 Published:1987-09-20

摘要: 本文以中国和西非二个典型沙丘海岸为例,说明海滨沙丘是海陆相互作用下形成的,特别是在冰期极地气候条件下,低海面时形成广大的岸外沙质浅滩,极地气旋风暴作用,促进海岸沙丘的形成发育。

Abstract: A sand dune coast, extended 45 km in the north part of the Luanhe River delta plain (39°25'-39°47'n) is biggest one in China, with the trend parallel to coastline, it's 1-4km wide.The average height of sand dunes is about 25m, the highest peak located near Qilihai in the middle section being 42m. sand materials consist of medium-fine sand with high roundness and heavy mineral assemblage is similar to the Luanhe River sediments. According to 14C dating, it is believed that the sand dune coast north of the Luanhe River delta was formed during the Holocene lower sea level under the influence of Arctic climate. Coastal Zone is a special area with the meteorologic and hydrologic factors which differ from both terrestrial and oceanic settings. It is also the area with strong interation between land and sea, and the sand dune coast might be an effeetive example showing the interaction. As sand dune coast develops, strong prevailing on land winds blow large amount of sand up from sea shore; medium tidal range and gentle coastal slope are also the basic factors to improve the developing of sand dunes. However, during cold phases of Holocene under the Arctic climate influence, it offers a better environment to satisfy all the factors for sand dune development.