滨海含水层氯苯多相迁移数值模拟

doi:10.3799/dqkx.2026.128

滨海含水层氯苯多相迁移数值模拟

doi: 10.3799/dqkx.2026.128

1. 中国海洋大学环境科学与工程学院, 山东青岛, 266100;
2. 生态环境部土壤与农业农村生态环境监管技术中心, 北京, 100012

基金项目:

国家自然科学基金优秀青年科学基金项目（42422207）

详细信息

作者简介:
郑天元（1988-），男，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

通讯作者:
郑天元，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

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出版历程
- 收稿日期: 2026-01-30
- 网络出版日期: 2026-05-13

Numerical Simulation of Chlorobenzene Multiphase Migration in a Coastal Aquifer

1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;
2. Technical Center for Soil, Agriculture and Rural Ecology and Environmental, Ministry of Ecology and Environmental, Beijing 100012, China

摘要

摘要: 为揭示海水入侵所驱动的变密度流场对重质非水相液体（DNAPL）多相运移路径与相间质量交换的调控机制，本研究以氯苯为例构建变密度流-多相流-溶质运移耦合数值模型，系统模拟其入渗、再分布及溶解羽演化过程。研究结果表明：（1） NAPL相氯苯在重力主导下垂直入渗并在隔水底板形成非对称污染池；（2）咸水楔显著改变溶解相氯苯的运移路径，密度梯度驱动其沿咸淡水界面爬升，并在咸淡水过渡带积聚，且排海通量峰值较无海水入侵情景降低62%；（3）渗透系数K的增大加速NAPL相和溶解相氯苯向海洋边界迁移，同时强化溶解相在咸淡水过渡带的累积。本研究阐明了咸淡水过渡带对DNAPL迁移的截留机制，证实该区域是滨海地下水环境风险评估中不可忽视的长期次生污染源。
- 滨海含水层 /
- 海水入侵 /
- DNAPL /
- 氯苯 /
- 多相流数值模拟
Abstract: To reveal the regulatory mechanism of the variable-density flow field induced by seawater intrusion on the multiphase migration pathways and interphase mass exchange of dense non-aqueous phase liquids (DNAPL), this study developed a coupled variable-density flow, multiphase flow, and solute transport numerical model using chlorobenzene as an example, systematically simulating its infiltration, redistribution, and dissolved plume evolution. The results indicate that: (1) The NAPL-phase chlorobenzene vertically infiltrates under gravity-dominated conditions, forming an asymmetric contaminant pool above the aquitard; (2) The saltwater wedge significantly alters the migration pathway of dissolved-phase chlorobenzene, with density gradients driving its upward movement along the freshwater-saltwater interface and accumulation in the mixing zone, while the peak discharge flux to the sea decreased by 62% compared to the scenario without seawater intrusion; (3) An increase in hydraulic conductivity (K) accelerates the migration of both NAPL-phase and dissolved-phase chlorobenzene toward the marine boundary, while enhancing the accumulation of the dissolved phase within the mixing zone. This study elucidates the retention mechanism of the mixing zone for DNAPL migration and confirms that this zone represents a non-negligible long-term secondary pollution source in coastal groundwater environmental risk assessments.
- Coastal aquifer /
- Seawater intrusion /
- DNAPL /
- Chlorobenzene /
- Multiphase flow numerical simulation

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参考文献(43)

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滨海含水层氯苯多相迁移数值模拟

doi: 10.3799/dqkx.2026.128

作者简介:
郑天元（1988-），男，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

通讯作者:
郑天元，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

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Numerical Simulation of Chlorobenzene Multiphase Migration in a Coastal Aquifer

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目录

留言板

滨海含水层氯苯多相迁移数值模拟

doi: 10.3799/dqkx.2026.128

作者简介: 郑天元（1988-），男，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

通讯作者: 郑天元，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

计量

出版历程

Numerical Simulation of Chlorobenzene Multiphase Migration in a Coastal Aquifer

计量

出版历程

目录

作者简介:
郑天元（1988-），男，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281

通讯作者:
郑天元，教授，研究方向为地下水渗流模拟。ORCID:0000-0002-8948-064X，E-mail：zhengtianyuan@ouc.edu.cn，Tel:18563980281