2017—2020年江苏中部潮滩地貌的季节和年际演化

樊一阳; 彭雲; 王韫玮; 于谦

doi:10.16562/j.cnki.0256-1492.2023052101

2017—2020年江苏中部潮滩地貌的季节和年际演化

1.
南京大学地理与海洋科学学院，海岸与海岛开发教育部重点实验室，南京 210023

2.
南京师范大学海洋科学与工程学院，南京 210023

基金项目: 国家自然科学基金面上项目“牡蛎礁多尺度沉积动力过程与地貌演化”（42076172）；江苏省自然资源发展专项资金（海洋科技创新）项目“黄海湿地生态岸线调查与保护关键技术研究”（JSZRHYKJ202115）

详细信息

作者简介: 樊一阳（1996—），男，硕士研究生，海洋沉积动力学专业，E-mail：yiyangfan0510@gmail.com

通讯作者: 于谦（1982—），男，副教授，主要从事海洋沉积动力学研究，E-mail：qianyu.nju@gmail.com

中图分类号: P737.1

收稿日期: 2023-05-21

修回日期: 2023-09-01

录用日期: 2023-09-01

刊出日期: 2023-12-28

Seasonal and interannual evolution of geomorphology in middle Jiangsu tidal flat from 2017 to 2020

1.
Key Laboratory of Coast and Island Development of the Ministry of Education, School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China

2.
School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China

More Information

Corresponding author: YU Qian, qianyu.nju@gmail.com

Received Date: 21 May 2023

Revised Date: 01 September 2023

Accepted Date: 01 September 2023

Publish Date: 28 December 2023

摘要

摘要:
为了研究江苏中部潮滩地貌的季节性演化规律，分别在江苏沿岸大丰港南侧、大丰港北侧，以及射阳河口北侧选取了三条跨岸剖面。在2017年11月—2018年11月进行了多次地貌和表层沉积物的重复观测和采样分析，并对2017—2020年间3条剖面的年际变化进行了观测。结果显示，2017年11月—2018年11月，大丰港南侧潮滩在春秋两季较为稳定，冬夏两季侵蚀较为明显，全年表现较为稳定；大丰港北侧潮滩全年基本处于明显侵蚀状态；射阳河口附近潮滩全年出现轻微侵蚀，但整体较为稳定。在年际尺度下，2017—2018年，大丰港附近潮滩均出现整体侵蚀的现象，射阳河口潮滩则出现潮间带上部淤积、下部侵蚀的现象；2018—2019年，江苏中部潮滩潮间带高程均出现不同程度的上涨；2019—2020年，江苏中部潮滩均出现潮间带上部稳定或轻微侵蚀、下部明显侵蚀现象。对潮滩演化状态研究显示，江苏中部潮滩的季节性变化受多种因素影响，冬季波浪增强与夏季风暴频率增加均会导致江苏中部潮滩在当季出现侵蚀现象，沉积物供给减少会导致潮滩季节性冲淤趋势整体向侵蚀状态偏移；江苏潮滩北部的侵蚀/淤积区域分界点可能已经从射阳河口向南转移至大丰港南部区域；年际尺度下，江苏中部潮滩表现出较为一致的变化规律。
- 泥质潮滩 /
- 地貌变化 /
- 季节性变化 /
- 年际变化 /
- 冲淤分界点 /
- 江苏海岸
Abstract:
To investigate the seasonal evolution patterns of geomorphology in the middle Jiangsu tidal flat, three cross-shore profiles along the Jiangsu coast were selected: one on the south side of Dafeng Harbor, one on the north side of Dafeng Harbor, and another on the north side of the Sheyang River estuary. A series of repeated observations in geomorphology and surface sediments were conducted from November 2017 to November 2018, and the interannual variations of the three profiles were monitored from 2017 to 2020. Results reveal that the tidal flat on the south side of Dafeng Harbor exhibited relative stability in spring and autumn, but experienced more noticeable erosion in winter and summer, being overall stable throughout the year. In contrast, the tidal flat on the north side of Dafeng Harbor experienced evident erosion throughout the entire year, while the tidal flat near the Sheyang River estuary showed slight erosion year-round but remained relatively stable overall. From 2017 to 2020, the erosion and deposition changes in the three profiles exhibited a consistent trend. From 2017 to 2018, all tidal flats near Dafeng Harbor experienced overall erosion, while the tidal flat near the Sheyang River estuary showed siltation in the upper part of the intertidal zone and erosion in the lower part. In the following period from 2018 to 2019, varying degrees of siltation were observed in the middle Jiangsu tidal flat. From 2019 to 2020, all the tidal flats in the middle Jiangsu coast showed stabilization or slight erosion in the upper part of the intertidal zone and obvious erosion in the lower part of the intertidal zone. The analysis of the tidal flat evolution state reveals several key points. (1) The seasonal changes in the middle Jiangsu coast’s tidal flats are influenced by multiple factors. Winter wave intensification and increased storm frequency in summer contribute to seasonal erosion, while reduced sediment supply leads to an overall erosion trend. (2) The division point between erosion and deposition in the northern part of the Jiangsu tidal flat appears to have shifted southward from the Sheyang River estuary to the southern part of Dafeng Harbor. (3) The middle Jiangsu tidal flats exhibit a relatively consistent variation pattern on interannual scale.
- mud flat /
- morphodynamics /
- seasonal change /
- interannual change /
- erosion/ deposition dividing point /
- Jiangsu coast

HTML全文

图 1 江苏中部潮滩研究区域（a）及L2剖面（b）、L3剖面（c）、L5剖面（d）

Figure 1.

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图 2 L2剖面2017年11月—2018年11月高程变化结果

Figure 2.

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图 3 L2剖面2017年11月—2018年11月粒度参数变化结果

Figure 3.

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图 4 L3剖面2017年11月—2018年11月高程变化结果

Figure 4.

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图 5 L3剖面2017年11月—2018年11月粒度参数变化结果

Figure 5.

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图 6 L5剖面2017年11月—2018年11月高程变化结果

Figure 6.

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图 7 L5剖面2017年11月—2018年11月粒度参数变化结果

Figure 7.

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图 8 江苏中部潮滩2017—2020年高程变化结果

Figure 8.

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