沿海含水层水力屏障抵御海水入侵的有效性评价——以莫纳格含水层为例

IF 4.9 Q2 ENGINEERING, ENVIRONMENTAL

Groundwater for Sustainable Development Pub Date : 2025-05-02 DOI:10.1016/j.gsd.2025.101451

Faten Jarraya-Horriche , Wolfgang Bogacki , Lobna Triki

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引用次数: 0

摘要

海水入侵（SWI）是沿海含水层常见的威胁。本文介绍了Mornag沿海含水层SWI现状的研究结果，以及利用注水井人工补给地下水的水力屏障设计，以保护含水层免受进一步的SWI。使用FEFLOW开发的三维区域地下水流动模型和两个垂直二维密度相关的质量输运模型相结合，研究了不同的变化。实地调查和模型模拟证实，目前海水已经进入含水层，达到了大约1米的距离。与距离海岸线3公里的自然位置相比，距离海洋约1公里。如果不实施水力屏障和持续的地下水过度开采，3克/升的等盐盐将在大约25年内达到屏障的计划位置。预测模型仿真结果表明，所分析的所有操作变量均能控制当前位置的盐水锋。控制SWI所需的年平均注入量约为每年600 - 700万立方米。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Assessment of the effectiveness of a hydraulic barrier against seawater intrusion in a coastal aquifer – the case study of Mornag aquifer

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Assessment of the effectiveness of a hydraulic barrier against seawater intrusion in a coastal aquifer – the case study of Mornag aquifer

Seawater intrusion (SWI) is a common threat in costal aquifers. This paper presents results of a study on the present situation of SWI in the Mornag coastal aquifer and the design of a hydraulic barrier by artificial groundwater recharge using injection wells to protect the aquifer from further SWI. A combination of a 3D regional groundwater flow model and two vertical 2D density-dependent mass-transport models, both developed with FEFLOW, is used to study different variants.

Field investigations as well as model simulations confirm that currently seawater has already advanced into the aquifer to a distance of approx. 3 km from the coastline compared to the natural position at about 1 km from the sea. Without implementation of the hydraulic barrier and an ongoing groundwater overexploitation, the 3 g/l isohaline will reach the planned location of the barrier in about 25 years. According to the predictive model simulations, all analyzed operation variants can control the saline front at the current position. The required average annual injection volume to control SWI is about 6–7 million cubic meters per year.

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来源期刊

Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development

CiteScore

11.50

自引率

10.20%

发文量

152

期刊介绍： Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.