Browsing by Author "Asadi-Aghbolaghi, Mahdi"

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Groundwater response to tidal fluctuation in a sloping leaky aquifer system
(2012-10-01)
Asadi-Aghbolaghi, Mahdi
;
Chuang, Mo-Hsiung
;
Yeh, Hund-Der
;
環境工程研究所
;
Institute of Environmental Engineering
The effect of tidal fluctuation on groundwater flow is an important issue from many aspects in coastal areas. This paper develops a new analytical solution to describe the groundwater fluctuation in a sloping coastal aquifer system which comprises an upper unconfined aquifer, a lower confined aquifer, and an aquitard in between. The solution is allowed to investigate the effects of bottom slope and leakage as well as aquifer parameters on head fluctuations in both unconfined and confined aquifers. The research result indicates that the effect of the bottom angle on the groundwater fluctuation and time lag is significant in the unconfined aquifer and not negligible if the leakage in the confined aquifer is large. In addition, the joint effects of aquifer parameters and bottom angle on groundwater fluctuation and time lag are also discussed. (C) 2011 Elsevier Inc. All rights reserved.
Groundwater Response to Tidal Fluctuation in an Inhomogeneous Coastal Aquifer-Aquitard System
(2014-09-01)
Asadi-Aghbolaghi, Mahdi
;
Chuang, Mo-Hsiung
;
Yeh, Hund-Der
;
環境工程研究所
;
Institute of Environmental Engineering
This paper investigates tide-induced groundwater fluctuation and submarine groundwater discharge (SGD) in a leaky inhomogeneous coastal aquifer system with an upper unconfined aquifer, a lower confined aquifer, and an aquitard between them. The upper left aquifer is formed due to land reclamation. The SGD defined as the groundwater flow from land into the sea is controlled mainly by the hydraulic gradient between land and sea. An analytical expression is developed to discuss and assess the effect of inhomogeneity on the groundwater head fluctuation in the leaky aquifer system. Joint effects of aquifers\' parameters such as leakage and hydraulic diffusivity on the groundwater head fluctuation and SGD are investigated. The predicted results from the analytical expression indicate that the groundwater head fluctuation in both unconfined and confined aquifers is dependent on dimensionless leakages and increases with dimensionless hydraulic diffusivity.
Groundwater Response to Tidal Fluctuation in an Inhomogeneous Coastal Aquifer-Aquitard System
(2014-09-01)
Asadi-Aghbolaghi, Mahdi
;
Chuang, Mo-Hsiung
;
Yeh, Hund-Der
;
環境工程研究所
;
Institute of Environmental Engineering
This paper investigates tide-induced groundwater fluctuation and submarine groundwater discharge (SGD) in a leaky inhomogeneous coastal aquifer system with an upper unconfined aquifer, a lower confined aquifer, and an aquitard between them. The upper left aquifer is formed due to land reclamation. The SGD defined as the groundwater flow from land into the sea is controlled mainly by the hydraulic gradient between land and sea. An analytical expression is developed to discuss and assess the effect of inhomogeneity on the groundwater head fluctuation in the leaky aquifer system. Joint effects of aquifers' parameters such as leakage and hydraulic diffusivity on the groundwater head fluctuation and SGD are investigated. The predicted results from the analytical expression indicate that the groundwater head fluctuation in both unconfined and confined aquifers is dependent on dimensionless leakages and increases with dimensionless hydraulic diffusivity.