The Interface Between Fresh and Salt Groundwater: A Numerical Study
نویسنده
چکیده
[Received 8 May 1987 and in revised form 23 May 1988] In this paper the two-dimensional flow of fresh and salt water through a homogeneous aquifer is considered. The two fluids are assumed to be separated by a sharp interface. They differ only in their specific weight. This difference induces a flow in the aquifer which in turn causes a motion of the interface. We present a mathematical formulation of this problem which consists of a Poisson equation for the stream function coupled to a time evolution equation for the moving interface. The equation for the stream function is solved by means of a finite-element method while a predictor-corrector method (the 5* p scheme) is used for the discretization of the equation for the interface.
منابع مشابه
Numerical Simulation and Estimation of the Transvers Macrodispersivity Coefficient of Aqueous Phase (Miscible) Contaminants of Salt Water in a Heterogeneous and Homogeneous Porous Media
Deterioration of groundwater resources in coastal regions due to the progression of saline water in aquifers in these regions is currently one of the important issues in providing water needs in these areas. In coastal regions, saline water enters the aquifer from below in shape of wedge. Due to the difference in the density between fresh and salty water, an interface zone forms between two flu...
متن کاملCompare the geo-electric and geo-electromagnetic methods in determining saltwater and fresh water interference in the aquifer West and East Babolsar
Groundwater is of the most reliable sources of water for agriculture and drinking. In coastal areas due to saltwater intrusion, determine the interface between fresh and salt water for residents of these areas is very important. In this study, the characteristics of coastal aquifers West and East Babolsar, using geoelectrical studies and geo-electromagnetic studied that these methods are of the...
متن کاملGroundwater flow and salt transport in a subterranean estuary 2 driven by intensified wave conditions
25 A numerical study, based on a density-dependent variably saturated groundwater flow model, 26 was conducted to investigate flow and salt transport in a near-shore aquifer under intensified 27 wave conditions caused by offshore storms. Temporally varying onshore hydraulic gradients due 28 to wave set-up were determined as the seaward boundary condition for the simulated aquifer. 29 The result...
متن کاملThe effects of cut-off walls on repulsing saltwater based on modeling of density-driven groundwater flow and salt transport
Abstract: A two-dimensional fully implicit finite difference model, which can be easily extended to three dimensions, is developed to study the effect of cut-off walls on saltwater intrusion into the aquifers. This model consists of a coupled system of two nonlinear partial differential equations which describe unsteady density-driven groundwater flow and solute transport. The numerica...
متن کاملFreshwater and Salt Water Interface Flow in GFLOW
In coastal areas groundwater quality may be degraded by intrusion of salt sea water into freshwater aquifers. The salinity of the groundwater changes its physical properties: an increase in salinity increases both the density and viscosity of the groundwater. These density differences are the primary driving force that allows salt water to move into the coastal aquifer, forming a salt water “we...
متن کامل