波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

刘红

文章导航 > 沉积学报 > 2008 > 26(5): 833-843

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

引用本文:

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

LIU Hong. Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary[J]. Acta Sedimentologica Sinica, 2008, 26(5): 833-843.

Citation:

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

引用本文:

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

Citation:

波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

刘红

华东师范大学河口海岸学国家重点实验室上海 200062

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Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

LIU Hong

State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062

摘要

摘要: 通过对崇明东滩两个海滩剖面、表层沉积物和悬沙粒度以及同步水沙资料的分析，探讨波流共同作用下表层沉积物和地貌的分异规律。受波流共同作用的影响，表层沉积物中值粒径由破波带向两侧逐渐变细，分选由破波带向两侧逐渐变差，偏度由极正偏变为正偏，峭度由很窄尖变为宽平和中等峭度。由破波带向岸方向，流速逐渐减小，含沙量逐渐增加。悬沙和表层沉积物粒度特征的对比分析表明，潮间带上部的悬沙主要来源于破波带泥沙的再悬浮。破波带内泥沙以“波浪掀沙”引起的分选运移为主，而破波带两侧的泥沙以潮流对破波带水体的“平流输移”为主。以潮汐水位和高精度海滩剖面数据对崇明东滩微地貌类型按高程进行了新的划分。
- 长江口 /
- 崇明东滩 /
- 海滩剖面 /
- 破波带 /
- 微地貌
Abstract: Based on the data of two tidal flat profiles, surface sediment and suspended sediment grainsize, current velocity and suspended sediment concentration in the east Chongming tidal flat, the sediment and geomorphology differentiation of tidal flat profiles combined wave and current actions were analyzed. The results showed that the surface sediment D50 decreased gradually from the surf zone to the near shore and outer sea. The sorting of the surface sediment increased, and the skewness changed from very positive to positive, and the kurtosis changed from very leptokurtic to platykurtic and mesokurtic. The current velocity decreased and the suspended sediment concentration increased from the surf zone to the near shore. The comparative analysis of suspended and surfacial sediment grain size showed that the suspended sediment in the upper of intertidal zone mainly came from the sediment resuspension of the surf zone. The selective transport due to the sediment uplift by wave dominated the sediment transport in the surf zone, and the sediment horizontal transport by tidal current dominated the sediment transport in the near shore and outer sea beside the surf zone. The microgeomorphic units of east Chongming tidal flat were divided based on the discussion of the water level and accurate elevation recently.
- Changjiang Estuary /
- east Chongming tidal flat /
- tidal flat profiles /
- surf zone /
- microgeomorphic units

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[1]	倪和平, 毕磊, 郭玉龙, 何中发, 杨守业. 长江口沉积物化学相态分析及主泓变迁的指示 . 沉积学报, 2023, 41(1): 243-255. doi: 10.14027/j.issn.1000-0550.2021.084
[2]	金秉福, 党丽丽, 孔庆祥, 王孟瑶, 岳伟, 樊水淼. 黄河和长江沉积角闪石亲石元素地球化学特征对比与物源辨识 . 沉积学报, 2022, 40(1): 149-165. doi: 10.14027/j.issn.1000-0550.2020.098
[3]	逄悦, 范德江, 孙晓霞, 刘明, 杨作升. 长江口及邻近海域悬浮颗粒重晶石特征与成因探讨 . 沉积学报, 2016, 34(3): 523-530. doi: 10.14027/j.cnki.cjxb.2016.03.010
[4]	杨云平, 李义天, 孙昭华, 邓金运. 长江口邻近陆架表层沉积物变化特征及成因 . 沉积学报, 2014, 32(5): 863-872.
[5]	. 长江口泥质区沉积物颜色反射率指示的近百年来东亚季风变迁 . 沉积学报, 2013, 31(2): 331-339.
[6]	. 长江口盐沼硫酸盐还原菌的分布特征与环境机制 . 沉积学报, 2012, 30(6): 1088-1098.
[7]	. 海南高隆湾海滩生物碎屑分布及其对沉积物粒度特征的影响 . 沉积学报, 2012, 30(5): 891-899.
[8]	周开胜. 长江口北支有孔虫组合及其环境意义 . 沉积学报, 2009, 27(2): 334-342.
[9]	战庆. 长江口区晚新生代沉积物粒度特征和沉积地貌环境演变 . 沉积学报, 2009, 27(4): 674-683.
[10]	张瑞. 长江河口水下三角洲210Pb分布特征及其沉积速率 . 沉积学报, 2009, 27(4): 704-713.
[11]	王永红. 长江河口涨落潮槽沉积物特征及其动力响应 . 沉积学报, 2009, 27(3): 511-516.
[12]	齐红艳. 长江口及邻近海域表层沉积物pH、Eh分布及制约因素 . 沉积学报, 2008, 26(5): 820-827.
[13]	刘红. 长江口表层沉积物粒度时空分布特征 . 沉积学报, 2007, 25(3): 445-455.
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[15]	. 长江口崇明东滩沉积物间隙水中营养盐剖面及其数学模拟 . 沉积学报, 2006, 24(05): 722-732.
[16]	段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物²¹⁰Pb分布及沉积环境解释 . 沉积学报, 2005, 23(3): 514-522.
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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

刘红

华东师范大学河口海岸学国家重点实验室上海 200062

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2008-10-10

关键词:

长江口 /

崇明东滩 /

海滩剖面 /

破波带 /

微地貌

摘要: 通过对崇明东滩两个海滩剖面、表层沉积物和悬沙粒度以及同步水沙资料的分析，探讨波流共同作用下表层沉积物和地貌的分异规律。受波流共同作用的影响，表层沉积物中值粒径由破波带向两侧逐渐变细，分选由破波带向两侧逐渐变差，偏度由极正偏变为正偏，峭度由很窄尖变为宽平和中等峭度。由破波带向岸方向，流速逐渐减小，含沙量逐渐增加。悬沙和表层沉积物粒度特征的对比分析表明，潮间带上部的悬沙主要来源于破波带泥沙的再悬浮。破波带内泥沙以“波浪掀沙”引起的分选运移为主，而破波带两侧的泥沙以潮流对破波带水体的“平流输移”为主。以潮汐水位和高精度海滩剖面数据对崇明东滩微地貌类型按高程进行了新的划分。

English Abstract

Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

LIU Hong

State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2008-10-10

Keywords:

Abstract: Based on the data of two tidal flat profiles, surface sediment and suspended sediment grainsize, current velocity and suspended sediment concentration in the east Chongming tidal flat, the sediment and geomorphology differentiation of tidal flat profiles combined wave and current actions were analyzed. The results showed that the surface sediment D50 decreased gradually from the surf zone to the near shore and outer sea. The sorting of the surface sediment increased, and the skewness changed from very positive to positive, and the kurtosis changed from very leptokurtic to platykurtic and mesokurtic. The current velocity decreased and the suspended sediment concentration increased from the surf zone to the near shore. The comparative analysis of suspended and surfacial sediment grain size showed that the suspended sediment in the upper of intertidal zone mainly came from the sediment resuspension of the surf zone. The selective transport due to the sediment uplift by wave dominated the sediment transport in the surf zone, and the sediment horizontal transport by tidal current dominated the sediment transport in the near shore and outer sea beside the surf zone. The microgeomorphic units of east Chongming tidal flat were divided based on the discussion of the water level and accurate elevation recently.

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

引用本文:

刘红. 波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例[J]. 沉积学报, 2008, 26(5): 833-843.

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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

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Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

华东师范大学河口海岸学国家重点实验室上海 200062

English Abstract

Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062

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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

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Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

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波流共同作用下潮滩剖面沉积物和地貌分异规律——以长江口崇明东滩为例

华东师范大学 河口海岸学国家重点实验室 上海 200062

English Abstract

Sediment and Geomorphology Differentiation of Tidal Flat Profiles  Combined Wave and Current Actions:a case of the east  Chongming tidal flat, Changjiang Estuary

State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062

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华东师范大学河口海岸学国家重点实验室上海 200062