人工岛建设对海口湾沉积特征与泥沙运移的影响

肖哲宇; 戚洪帅; 蔡锋; 刘根; 赵绍华; 朱君; 雷刚; 尹航

doi:10.12284/hyxb2022001

人工岛建设对海口湾沉积特征与泥沙运移的影响

doi: 10.12284/hyxb2022001

肖哲宇^1,,
戚洪帅^{1, 2, ,},
蔡锋^{1, 2},
刘根¹,
赵绍华^{1, 2},
朱君^{1, 2},
雷刚^{1, 2},
尹航¹

1.
自然资源部第三海洋研究所，福建厦门 361005
2.
福建省海洋生态保护与修复重点实验室，福建厦门 361005

基金项目: 国家自然科学基金（41930538）。

详细信息

作者简介:
肖哲宇（1997-），男，湖北省荆州市人，主要从事海洋地质方面的研究。E-mail：roger_xzy@126.com

通讯作者:
戚洪帅（1980-），男，山东省日照市人,研究员，主要从事海岸动力地貌研究。E-mail：qihongshuai@tio.org.cn

中图分类号: P736.21
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出版历程
- 收稿日期: 2020-10-07
- 修回日期: 2021-02-17
- 刊出日期: 2022-03-18

The impact of artificial island construction on sedimentary characteristics and sediment transport in the Haikou Bay

Xiao Zheyu^1
,,
Qi Hongshuai^{1, 2
, ,},
Cai Feng^{1, 2},
Liu Gen¹,
Zhao Shaohua^{1, 2},
Zhu Jun^{1, 2},
Lei Gang^{1, 2},
Yin Hang¹

1.
Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
2.
Fujian Provincial Key Laboratory of Marine Ecological Conservation and Restoration, Xiamen 361005, China

摘要

摘要: 近年来，人工岛被广泛应用于沿海地区的填海造陆工程以快速获得优质土地，但大面积的人工岛建设会对近岸海底沉积物的分布模式及输运过程产生重要影响。为认识人工岛建设后沉积物变化与运移特征，本文以南海明珠人工岛对海口湾的影响为例，根据人工岛建设前后分别在海口湾近岸采集的底质表层沉积物分析了沉积物特征变化，结合沉积动力分析及粒径趋势分析等方法，讨论了人工岛建设对海口湾表层沉积物性质及运移的影响。研究结果表明，在人工岛建设后，湾内表层沉积物细粒组分增加、粒径减小、分选变差；人工岛修建造成的海口湾沉积动力条件减弱是湾内沉积物变细、泥沙运移方向改变的重要原因。
- 人工岛 /
- 表层沉积物 /
- 粒径趋势分析 /
- 沉积特征 /
- 海口湾
Abstract: In recent years, artificial islands have been widely constructed in coastal areas to quickly obtain high-quality land resources. However, the construction of artificial islands may exert substantial effects on the distribution patterns and transport processes of offshore seabed sediments. To understand the changes and transport characteristics of sediments after the construction of artificial islands, this article focuses on the impact of Nanhaimingzhu (NHMZ) artificial island on the properties and distribution of offshore seabed sediments in the Haikou Bay. With surface sediments sampled respectively in the offshore of the Haikou Bay before and after the construction of NHMZ artificial island, the changes in sediment characteristics were analyzed. The impact of NHMZ artificial island on the surface sediments properties and transport trend in the Haikou Bay was discussed with sedimentary dynamic and grain size trends analysis. The results showed that the surface sediment properties changed significantly after the construction of NHMZ artificial island, with the fine-grained sediment composition increased, grain size decreased and the sorting worsen. It was found that the weakening of sedimentary dynamic conditions in the Haikou Bay caused by NHMZ artificial island was an important factor for the changes in seabed surface sediments grain size and the trend of sediment transport.
- artificial island /
- surface sediment /
- grain size trends analysis /
- sedimentary characteristics /
- Haikou Bay

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图 1 南海明珠人工岛及研究区位置

Fig. 1 Location of study area and Nanhaimingzhu artificial island

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图 2 2009年（a）和2019年（b）海口湾采样站位

Fig. 2 Sample stations in the Haikou Bay in 2009 (a) and 2019 (b)

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图 3 人工岛建设前(a)和建设后(b)表层沉积物类型

Fig. 3 Surface sediment types before the construction (a) and after the construction (b) of artificial island

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图 4 表层沉积物各组分含量变化

Fig. 4 Contents changes of surface sediment components

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图 5 表层沉积物粒度参数变化

a、b. 人工岛建设前后平均粒径；c、d. 人工岛建设前后分选系数

Fig. 5 Grain size parameters changes of surface sediment

a, b. Average grain size before and after the construction of artificial island; c, d. sorting coefficient before and after the construction of artificial island

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图 6 人工岛建设前后表层沉积物粒径频率分布曲线

a. 两次采样位置接近的站位；b. 采样重合区域内所有站位

Fig. 6 Frequency distribution curves of surface sediment grain size before and after the construction of artificial island

a. Two nearby stations in twice samplings; b. all stations in coincidence area in twice samplings

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图 7 表层沉积物Flemming三角图

Fig. 7 Flemming’s ternary diagram of surface sediment sample stations

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图 8 海口湾表层沉积物运移趋势

a. 人工岛建设前；b. 人工岛建设后；箭头代表沉积物运移的趋势方向

Fig. 8 Trend of surface sediment transport in the Haikou Bay

a. Before the construction; b. after the construction; arrows represents the direction of trend of sediment transport

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图 9 人工岛建设后涨潮流（a）和落潮流（b）流速变化模拟（据文献[38] 修改）

Fig. 9 Numerical simulation result of flood current (a) and ebb current (b) speed after the construction of artificial island (modified from reference [38])

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图 10 人工岛建设前后水深变化及波影区岸线变化

a. 水深变化；b. 岸线变化，采用2010年、2019年地形

Fig. 10 Changes of water depth and shoreline in shadow zone before and after the construction of artificial island

a. Water depth variation; b. shoreline variation from topographic data in 2010 and 2019

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