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Numerical assessment of seawater intrusion in the Tripoli region, Libya

Numerical assessment of seawater intrusion in the Tripoli region, Libya Libya has experienced progressive seawater intrusion in the coastal aquifers since 1930s because of its ever increasing water demand from underground water resources. Tripoli City and its hinterland are located in the coastal region of the Gefara Plain, where the agricultural activity entirely depends on rainfall and groundwater. In recent years, the risk of seawater intrusion is continuously threatening coastal parts of the Gefara Plain that form one of the economically most significant area in the country. Hydrogeochemistry of the aquifer system was studied and a numerical assessment of the problem has been accomplished applying a two-stage finite element simulation algorithm. First, an areal, two-dimensional model was formulated in order to perform a steady-state calibration for the physical parameters, and boundary conditions of the hydrodynamic system. In the second stage, the mechanism of the seawater intrusion was analyzed using a cross-sectional finite element model. Simulation runs have been accomplished to study location of the interface and its temporal migration. The groundwater resource in the Tripoli region has been progressively contaminated by seawater intrusion. Simulation results indicate that the proposed scheme successfully simulates the intrusion mechanism. The seawater/freshwater interface would migrate landward leading to a very critical problem if the present groundwater production policy continues operating in the area. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Geology Springer Journals

Numerical assessment of seawater intrusion in the Tripoli region, Libya

Environmental Geology , Volume 40 (9) – Aug 13, 2001

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Publisher
Springer Journals
Copyright
Copyright © 2001 by Springer-Verlag
Subject
Earth Sciences; Geology
ISSN
0943-0105
eISSN
1432-0495
DOI
10.1007/s002540100317
Publisher site
See Article on Publisher Site

Abstract

Libya has experienced progressive seawater intrusion in the coastal aquifers since 1930s because of its ever increasing water demand from underground water resources. Tripoli City and its hinterland are located in the coastal region of the Gefara Plain, where the agricultural activity entirely depends on rainfall and groundwater. In recent years, the risk of seawater intrusion is continuously threatening coastal parts of the Gefara Plain that form one of the economically most significant area in the country. Hydrogeochemistry of the aquifer system was studied and a numerical assessment of the problem has been accomplished applying a two-stage finite element simulation algorithm. First, an areal, two-dimensional model was formulated in order to perform a steady-state calibration for the physical parameters, and boundary conditions of the hydrodynamic system. In the second stage, the mechanism of the seawater intrusion was analyzed using a cross-sectional finite element model. Simulation runs have been accomplished to study location of the interface and its temporal migration. The groundwater resource in the Tripoli region has been progressively contaminated by seawater intrusion. Simulation results indicate that the proposed scheme successfully simulates the intrusion mechanism. The seawater/freshwater interface would migrate landward leading to a very critical problem if the present groundwater production policy continues operating in the area.

Journal

Environmental GeologySpringer Journals

Published: Aug 13, 2001

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