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热带海洋学报

• • 上一篇    

广海湾新堆填陆域地下水海水入侵机制及协同响应研究

王华, 韦桂秋, 卢楚谦, 刘景钦
  

  1. 自然资源部南海生态中心，广东 广州, 510301


  • 收稿日期:2025-11-18 修回日期:2025-12-27 接受日期:2026-01-09
  • 通讯作者: 韦桂秋
  • 基金资助:

    广东省科技计划项目(2021B1212110001)；国家自然科学基金项目(42076129)

Mechanism and Synergistic Response of Seawater Intrusion in Groundwater of New Reclaimed Land in Guanghai Bay

WANG Hua, WEI Guiqiu, LU Chuqian, LIU Jingqin   

  1. South China Sea Ecology Centre，MNR， Guangzhou, 510301, China

  • Received:2025-11-18 Revised:2025-12-27 Accepted:2026-01-09
  • Supported by:

    the Science and Technology Planning Project of Guangdong Province (2021B1212110001); the National Natural Science Foundation of China ( 42076129)

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摘要： 近年来，随着沿海地区填海造地规模的不断扩大，海水入侵已成为沿海地区可持续发展的重要生态风险。本研究以粤港澳大湾区广海湾东部新堆填陆域为研究对象，基于2016年4月至2020年1月的监测数据，分析了近岸海水、地表水和地下水的物理化学指标，系统探讨了填海工程对地下水海水入侵的影响机制及其时空变化特征。研究发现：(1)填海区内的监测井J0未发生海水入侵，而J1、J2和J3分别表现出不同程度的海水入侵，其中J3的入侵程度最为严重；(2)地下水TDS和水位的变化具有显著的时间依赖性，非汛期(10月至次年3月)海水入侵现象尤为严重；(3)填海区内的地下水与周边水体的协同响应呈现出复杂的时滞效应，J3的盐度和水位时滞标准差均最大，响应具有异质性；(4)潮汐顶托作用和降雨分布不均是影响海水入侵的主要驱动因素。研究结果为填海工程的环境风险评估、海水入侵防治措施的制定以及区域生态环境保护提供了科学依据。

关键词: 填海工程, 地下水, 海水入侵, 协同响应, 时滞效应, 广海湾

Abstract: In recent years, with the continuous expansion of reclamation projects in coastal areas, seawater intrusion has become a significant ecological risk for sustainable development in coastal regions. This study focused on the eastern Guanghai Bay, an area within the Guangdong-Hong Kong-Macao Greater Bay Area, and analyzed the physicochemical indicators of nearshore seawater, surface water, and groundwater based on monitoring data from April 2016 to January 2020. The study systematically investigated the impact mechanism of reclamation projects on seawater intrusion in groundwater and its temporal and spatial variations. The findings revealed: (1) The monitoring wells in the reclamation area, J1, J2, and J3, exhibited varying degrees of seawater intrusion, with J3 showing the most severe intrusion, while J0 experienced no intrusion; (2) The variations in groundwater TDS and water level demonstrated significant time dependency, with seawater intrusion being particularly severe during the non-flood season (October to March of the following year); (3) The synergistic response between groundwater and surrounding water bodies exhibited complex lagging effects, with the standard deviation of both salinity and water level lags being the highest for J3, indicating heterogeneous responsiveness; (4) Tidal upwelling and uneven distribution of precipitation were identified as the primary drivers of seawater intrusion. The results provide scientific support for environmental risk assessment of reclamation projects, the development of seawater intrusion prevention measures, and regional ecological environmental protection.

Key words: Reclamation Project, Groundwater, Seawater Intrusion, Synergistic Response, Lagging Effect, Guanghai Bay