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中国沙漠 ›› 2021, Vol. 41 ›› Issue (6): 157-168.DOI: 10.7522/j.issn.1000-694X.2021.00098

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海南岛景心角海滩老鼠艻( Spinifex littoreus )灌丛沙堆沉积及形态特征

黄钦妮1(), 董治宝1(), 肖南2, 冯淼彦3, 石寰宇1, 陈国祥1, 白子怡1, 张欣1, 高冲1, 王晓枝1   

  1. 1. 陕西师范大学 地理科学与旅游学院,陕西 西安 710119
    2. 内蒙古师范大学 地理科学学院,内蒙古 呼和浩特 010022
    3. 岭南师范学院 地理系,广东 湛江 524048
  • 收稿日期:2021-07-05 修回日期:2021-08-05 出版日期:2021-11-20 发布日期:2021-12-17
  • 通讯作者: 董治宝
  • 作者简介:董治宝(E-mail: zbdong@snnu.edu.cn
    黄钦妮(1997—),女,广西钦州人,硕士研究生,研究方向为风沙地貌。E-mail: huangqinni@snnu.edu.cn
  • 基金资助:
    国家自然科学基金项目(41871008)

Sediments and morphology of coastal Spinifex littoreus nebkhas on Jingxinjiao beach of Hainan Island, China

Qinni Huang1(), Zhibao Dong1(), Nan Xiao2, Miaoyan Feng3, Huanyu Shi1, Guoxiang Chen1, Ziyi Bai1, Xin Zhang1, Chong Gao1, Xiaozhi Wang1   

  1. 1. School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China
    2. College of Geographical Science,Inner Mongolia Normal University,Hohhot 010022,China
    3. Department of Geography,Lingnan Normal University,Zhanjiang 524048,Guangdong,China
  • Received:2021-07-05 Revised:2021-08-05 Online:2021-11-20 Published:2021-12-17
  • Contact: Zhibao Dong

摘要:

灌丛沙堆是海岸带广泛发育的风积地貌,海南岛东北部海岸发育着典型的老鼠艻(Spinifex littoreus)灌丛沙堆。通过野外考察和室内实验,并结合气象数据对海南岛文昌海岸景心角海滩老鼠艻灌丛沙堆的形成动力条件、沉积物粒度、地球化学元素特征和形态进行系统分析。结果表明:稳定的向岸风以及开阔的沙质海滩是灌丛沙堆发育的基本条件;较低的风能环境和滩肩的“贝壳碎屑物带”是景心角灌丛沙堆规模较小的主要原因;景心角老鼠艻灌丛沙堆形态以锥型和蝌蚪型为主;与沙堆迎风坡相比,背风坡坡长对沙堆的长轴影响较大,而沙堆的长轴和迎风坡坡长则对沙堆高度的影响更突出;老鼠艻灌丛水平方向上的生长更能影响沙堆形态的发育。

关键词: 灌丛沙堆, 沉积特征, 形态, 老鼠艻(Spinifex littoreus), 海南岛

Abstract:

The coastal nebkhas is an eolian landform widely developed in the coastal areas, and there are many typical Spinifex littoreus nebkhas distributed along the northeastern coast of Hainan Province. Based on field study and laboratory experiments, combine with meteorological data, we systematically analyzed the morphology, dynamic conditions, grain size and geochemical element characteristics of S. littoreus nebkhas on Jingxinjiao beach of Hainan Island. The results show that stable onshore wind and wide sandy beach are the basic conditions for the development of nebkhas. The low wind energy environment and the " shell pavements " on the beach shoulder are the main reasons for the small scale of Jingxinjiao nebkhas. The S. littoreus nebkhas at Jingxinjiao is mainly like cone and tadpole. Compared with the windward slope of nebkhas, the leeward slope has a greater influence on the long axis of nebkhas. The length of the long axis and the windward slope have bigger effect on the height of nebkhas. The growth of S. littoreus nebkhas in the horizontal direction can affect the development of the morphology of nebkhas more.

Key words: nebkhas, sedimentary characteristics, morphology, Spinifex littoreus, Hainan Island

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