| 渤海湾连片开发对湾内水沙通量的影响研究 |
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| 引用本文： | 罗克志,陶建峰.渤海湾连片开发对湾内水沙通量的影响研究[J].海洋通报,2022(2). |
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| 作者姓名： | 罗克志 陶建峰 |
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| 作者单位： | 河海大学 港口海岸与近海工程学院， 江苏 南京 210098 |
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| 基金项目： | 国家重点研发计划 (2018YFC0407501)； 国家自然科学基金 (52071129) |
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| 摘 要： | 渤海湾内海岸的连续开发导致岸线 、海床发生较大变化， 同时影响着湾内的水沙通量。根据不同时期的遥感影像、 实测地形和水文泥沙资料， 统计分析了渤海湾岸线 、面积和海床冲淤变化， 构建了渤海潮流泥沙数学模型， 模拟了 1984 年、 2006 年和 2015 年三个时期的水沙分布， 探究了海岸连续开发对水沙分布和通量引起的累积效应。结果表明： 渤海湾岸线和 海湾面积变化主要发生于 2005 年后， 与 1984 年相比， 2020 年的岸线长度增长超过 185%，海湾面积减少近 19%；曹妃甸港 区南侧海域冲刷基本在 2 m 等深线以内， 而近岸和港池水域基本呈现淤积状态， 淤积幅度在 2 m 以内； 海湾的连续开发利用 使得湾内分潮波振幅增大 、传播速度减缓， 近岸海域的余流变化较为明显，南部较北部海域更甚；西北湾顶 0.2 kg/m3 悬沙 分布区域不断缩小， 西南近岸 0. 15 kg/m3 悬沙分布区域向中部海域推进； 悬沙通量变化与潮流通量并不完全一致， 呈外海增 加、近岸整体降低的变化特征， 湾内向外海输移泥沙的能力减弱。
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| 关 键 词： | 渤海湾 连片开发 岸线变化 潮通量 泥沙通量 |
| 收稿时间： | 2021/8/9 0:00:00 |
| 修稿时间： | 2021/11/8 0:00:00 |
study on the impacts of contiguous development of Bohai Bay on the tidal current and suspended sediment fluxes |
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| LU Kezhi,TA Jianfeng.study on the impacts of contiguous development of Bohai Bay on the tidal current and suspended sediment fluxes[J].Marine Science Bulletin,2022(2). |
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| Authors: | LU Kezhi TA Jianfeng |
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| Institution: | College of Harbor. Coastal and 0ffshore Engineering. Hohai University. Nanjing. 210098. China |
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| Abstract: | The continuous development of the inner coast of Bohai Bay has caused major changes in the coastline and seabed. affected the tidal current and suspended sediment fluxes in the bay. Based on remote sensing images. measured topography. and hydrological and sediment data in different periods. the shoreline. area. and seabed erosion and deposition changes of the Bohai Bay were analyzed. The mathematical model of tidal current and sediment in the Bohai sea is developed to simulate the water and sediment distribution in 1984. 2006 and 2015. exploring the cumulative effect of continuous coastal development on tidal current and suspended sediment fluxes. The results show that the changes in the coastline and bay area of Bohai Bay mainly occurred after 2005. Compared with 1984. the coastline length increased by more than 185% and the bay area decreased by nearly 19% in 2020. The south side of Caofeidian port area is basically eroded within 2 m. while the coastal waters and harbor basins show siltation within 2m. The continuous development and utilization of the bay makes the amplitude of tidal wave in the bay increase and the propagation speed slow down. The residual current in the coastal waters changes more obviously than offshore areas. especially in the south than in the north. The 0.2 kg/m3 suspended sediment distribution area at the top of the northwest bay is shrinking. and the 0.15 kg/m suspended3 sediment distribution area near the southwest coast is advancing to the central sea area. The changes of the suspended sediment fluxes are not consistent with the tidal current fluxes. showing an increase in the open sea and an overall decrease in the nearshore. and the ability of the bay to transport sediment out into the sea is weakened. |
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| Keywords: | Bohai Bay: contiguous development: shoreline change: tidal flux: suspended sediment fluxes |
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