收稿日期: 2010-06-10
修回日期: 2010-09-28
网络出版日期: 2011-09-08
基金资助
国家自然科学基金项目(40761023); 华东师范大学河口海岸学国家重点实验室科研项目(2010RCDW03)
Deposition characteristics of beach profile in strong-tidal environment − A case
study of Yintan, Guangxi during spring
1. Key Laboratory of Beibu Gulf Environmental Evolution and Resources Utilization, Guangxi Teachers Education University, Ministry of Education, Nanning 530001, China; 2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China; 3. Second Institute of Oceanography, SOA, Hangzhou 310012, China
Received date: 2010-06-10
Revised date: 2010-09-28
Online published: 2011-09-08
海滩地貌动力状态是海滩过程和陆海相互作用研究中的重要内容, 但目前国内对北部湾强潮环境下的砂质
海滩地貌与沉积的研究相对较少。 对 2010 年 3 月采集的北海银滩剖面高程与沉积物变化的资料进行分析, 探讨此
类海滩响应外在驱动力作用的地貌动力状态特征, 结果表明: 1)北海银滩地貌结构简单, 地貌状态属于消散型类
型。2)银滩沉积物类型为砂, 并以细砂、中砂为主, 沉积物分选性较好; 此外, 沉积物中砂的百分含量和中值粒径
自陆向海逐渐减小, 而极细砂的百分含量则逐渐增加。3)北海银滩横向剖面沉积物可区分为后滨、滩面和内滨 3
个沉积单元。后滨沉积物在风的作用下以跃移质为主; 滩面沉积物因波浪形成的冲流作用而具有双向运动的性质;
内滨沉积物主要受控于波浪和潮流的联合驱动作用而以跃移质组分为主。
黄鹄 ,戴志军 ,施伟勇 ,盛凯 . 强潮环境下的海滩剖面沉积特征——以春季广西北海银滩为例[J]. 热带海洋学报, 2011 , 30(4) : 71 -76 . DOI: 10.11978/j.issn.1009-5470.2011.04.071
Beach morphodynamic state is one of the important contents to understand beach processes and land-ocean interac-
tion. Few studies on geomorphology and deposit for sandy beaches in response to strong-tidal action in China have ever been
conducted. Based on the measured profile change and associated depositions of Yintan Beach in March, 2010, deposition cha-
racteristics of strong-tidal beach profile in response to externally-driven actions were analyzed. The results show that: 1) It is
of simple geomorphologic composition for Yintan Beach, and its geomorphologic state is attributed to one of the dissipated
types. 2) Deposition of Yintan Beach is a kind of sand with main compositions of fine sand and medium sand. The sorting of
depositions is relatively well. In addition, the percentage of both medium sand and the median size in deposition gradually
decreased from land to sea, and the percentage of the super-fine sand in depositions from land to sea gradually increased. 3)
Depositions along the transverse profile for Yintan Beach can be divided into three types: backshore cell, beachface, and in-
shore part. Sediments in the backshore part consist of mainly saltation load under the control of wind action. Sediments in the
beachface are of bilateral movement resulted from swash actions driven by broken waves. However, sediments in the inshore
part consist of mainly siltation load with the determination of combination of tidal current and wave.
Key words： sediment; beach profile; macro-tidal environment; Yintan Beach; Guangxi
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