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中国沙漠 ›› 2020, Vol. 40 ›› Issue (6): 43-52.DOI: 10.7522/j.issn.1000-694X.2020.00068

• • 上一篇    下一篇

北部湾海岸现代风沙与海滩沙粒度特征对比

司月君1(), 李保生2,3(), 李志文4, 王丰年5, 牛东风6, 杜恕环7   

  1. 1.南宁师范大学 地理科学与规划学院/北部湾环境演变与资源利用教育部重点实验室,广西 南宁 530001
    2.中国科学院地球环境研究所 黄土与第四纪地质国家重点实验室,陕西 西安 710061
    3.华南师范大学 地理科学学院,广东 广州 510631
    4.东华理工大学 地球科学学院,江西 南昌 330013
    5.惠州学院 地理与旅游学院,广东 惠州 516007
    6.岭南师范学院 物理科学与技术学院,广东 湛江 524048
    7.中国科学院南海海洋研究所 边缘海与大洋地质重点实验室,广东 广州 510301
  • 收稿日期:2020-05-15 修回日期:2020-06-16 出版日期:2020-12-09 发布日期:2020-12-09
  • 通讯作者: 李保生
  • 作者简介:李保生(E-mail: libsh@scnu.edu.cn
    司月君(1983—),女,山西高平人,博士,讲师,研究方向为地貌与第四纪地质。E-mail: 830811moon@163.com
  • 基金资助:
    广西自然科学基金项目(2017GXNSFBA198126);南宁师范大学博士科研启动项目(0819-2014L08)

A comparative analysis of grain size characteristics of modern aeolian sand and beach sand from the coast of Beibu Gulf in China

Yuejun Si1(), Baosheng Li2,3(), Zhiwen Li4, Fengnian Wang5, Dongfeng Niu6, Shuhuan Du7   

  1. 1.School of Geography and Planning /Ministry of Education Key Laboratory of Beibu Gulf Environment Change and Resources Use,Nanning Normal University,Nanning 530001,China
    2.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China
    3.School of Geography,South China Normal University,Guangzhou 510631,China
    4.School of Earth Sciences,East China University of Technology,Nanchang 330013,China
    5.School of Geography and Tourism,Huizhou University,Huizhou 516007,Guangdong,China
    6.School of Physics Science & Technology,Lingnan Normal University,Zhanjiang 524048,Guangdong,China
    7.Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China
  • Received:2020-05-15 Revised:2020-06-16 Online:2020-12-09 Published:2020-12-09
  • Contact: Baosheng Li

摘要:

对分布在北部湾海岸——广西北海、钦州、防城港与海南西部棋子湾的88个现代风沙和95个海滩沙样品进行了粒度分析与对比。结果表明:北部湾海岸风沙与海滩沙均以细沙、中沙为主,二者在风沙中的平均含量分别为68.55%和28.61%,在海滩沙中则分别为50.57%和40.11%;海岸风沙和海滩沙的平均粒径分别为2.26 Φ和2.11 Φ,分选系数分别为0.48 Φ和0.62 Φ,偏度分别为0.00和0.04,峰态分别为0.96和1.21,海岸风沙比海滩沙略细、分选更好、偏度趋于对称、峰态趋于中等;二者粒度概率累积曲线均以跃移组分为主,海滩沙中含少量推移和悬移组分。海滩沙与风沙的粒度特征还呈现明显的区域性差异,底质以中沙为主的北海、棋子湾海滩沙与其上发育的风沙在粒度结构参数散点图上区分度更高。

关键词: 现代风沙, 海滩沙, 粒度特征, 北部湾海岸

Abstract:

Based the comparative analysis of grain size properties of 88 modern aeolian sand samples and 95 beach sand samples from Beihai, Qinzhou, Fangchenggang in Guangxi and Qiziwan in western Hainan along the Beibu Gulf, it suggests that both coast aeolian sand and beach sand mainly consist of fine sand and medium sand, and their average contents account for 68.55% and 28.61% in aeolian sand, and 50.57% and 40.11% in beach sand, respectively. In terms of grain size parameter, the mean grain size of coastal aeolian sand and beach sand is 2.26 Φ and 2.11 Φ, the sorting coefficient is 0.48 Φ and 0.62 Φ, the skewness is 0.00 and 0.04, and the kurtosis is 0.96 and 1.21, respectively. Compared with the beach sand, the aeolian sand is slightly finer, sorted better, skewness tends to be symmetrical, and kurtosis tends to be moderate. Both grain size probability cumulative curves are dominated by the jumping component, and the beach sand contains a small amount of moving and suspended components. The grain size characteristics of beach sand and aeolian sand also display obvious regional differences. The scatter of grain size structure parameter is distinguishable between the beach sand in Beihai and Qiziwan that is mainly the medium sand, and its overlying developed coastal aeolian sand.

Key words: modern aeolian sand, beach sand, grain size characteristics, Beibu Gulf coast

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