Groundwater Solute Transport Modeling:Effects of Transport and Fate

In this paper, the solution of the advection-dispersion equation with different sorption values is used for the prediction of solute concentration in groundwater. Sorption process in the groundwater is complex, due to increasing the groundwater pollution the effect of different chemical transport plotted. The fate and sorption process of different chemical different degradation constant. We used the analytical solution to evaluate the transport phenomenon and analysis of the chemical dissolved in groundwater. The solute transport model simulated with the analytical solution and final result obtained using MATLAB software. The solution of a test problem based on the sequential degradation of the different chemical in the groundwater. This solution of equilibrium and rate of sorption dynamics of processes is imperative for accurate fate and transport modeling. The present study shows the effects of advection, dispersion/diffusion, and sorption equation on the saturated media of soil. MATLAB software used for analyzing the solution of groundwater and showing the different case taking care of saturated aquifer and with different void ratio of soil its shows that the soil parameter is also impotent parameter and its effect can see in plot between concertation vs time. The solute transport model simulated with the analytical solution and final result obtained using MATLAB software. The solution of a test problem based on the sequential degradation of the different chemical in the groundwater. This study compares the solute concentration with respect to distance and its different hydraulics conductivity of dense sad and lose.

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Analytical Solution for Solute Transport in Semi-Infinite Heterogeneous Porous Media

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.312-315.495 ◽

2011 ◽

Vol 312-315 ◽

pp. 495-499

Author(s):

B.Q. Deng ◽

Y.F. Qiu ◽

C.N. Kim

Keyword(s):

Porous Media ◽

Analytical Solution ◽

Solute Transport ◽

Integral Transform ◽

Integral Transforms ◽

Heterogeneous Porous Media ◽

One Dimensional ◽

Advection Dispersion ◽

Integral Transform Technique ◽

Linear Decay

Solute transport in porous media concerns advection, dispersion, sorption, and reaction. Since porous media is commonly heterogeneous, the properties of porous media are spatially and temporally variable. In this paper, one dimensional unsteady solute transport in semi-infinite heterogeneous porous media is investigated. Both linear and nonlinear decay is considered. Analytical solution is obtained for linear decay with spatially and temporally diffusion coefficient and velocity by using generalized integral transform technique. The inverse integral transforms are developed for the problems in semi-infinite space based on some weighted functions. Some examples are given to show the application of the method and analytical solutions.

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Toward a Comprehensive Model of Chemical Transport in Porous Media

MRS Proceedings ◽

10.1557/proc-15-481 ◽

1982 ◽

Vol 15 ◽

Cited By ~ 4

Author(s):

Constance W. Miller

Keyword(s):

Transport Model ◽

Surface Complexation ◽

Chemical Species ◽

Chemical Transport ◽

Sorption Process ◽

Mass Action ◽

Chemical Transport Model ◽

Algebraic Form ◽

Advection Dispersion ◽

Groundwater Systems

ABSTRACTA chemical transport model, CHEMTRN, that includes advection, dispersion/diffusion, complexation, sorption, precipitation or dissolution of solids, and the dissociation of water has been written. The transport, mass action and site constraint equations are written in a differential/algebraic form and solved simultaneously. The sorption process is modelled by either ion-exchange or surface complexation. The model has been used to investigate the applicability of a kD model for simulating the transport of chemical species in groundwater systems, to simulate precipitation/dissolution of minerals, and to consider the effect of surface complexation on sorption.

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Spatial Variability of Physical Parameters and Processes in Two Field Soils

Hydrology Research ◽

10.2166/nh.1991.0022 ◽

1991 ◽

Vol 22 (5) ◽

pp. 327-340 ◽

Cited By ~ 7

Author(s):

K. Høgh Jensen ◽

J. C. Refsgaard

Keyword(s):

Transport Model ◽

Flow Direction ◽

Measurement Data ◽

Flow Simulation ◽

Solute Concentration ◽

Conclusive Evidence ◽

Physical Parameters ◽

Effective Parameters ◽

The Mean ◽

Tracer Experiments

A numerical analysis of solute transport in two spatially heterogeneous fields is carried out assuming that the fields are composed of ensembles of one-dimensional non-interacting soil columns, each column representing a possible soil profile in statistical terms. The basis for the analysis is the flow simulation described in Part II (Jensen and Refsgaard, this issue), which serves as input to a transport model based on the convection-dispersion equation. The simulations of the average and variation in solute concentration in planes perpendicular to the flow direction are compared to measurements obtained from tracer experiments carried out at the two fields. Due to the limited amount of measurement data, it is difficult to draw conclusive evidence of the simulations, but reliable simulations are obtained of the mean behaviour within the two fields. The concept of equivalent soil properties is also tested for the transport problem in heterogeneous soils. Based on effective parameters for the retention and hydraulic conductivity functions it is possible to predict the mean transport in the two experimental fields.

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Influence of Chemical Osmosis on Solute Transport and Fluid Velocity in Clay Soils

Open Chemistry ◽

10.1515/chem-2020-0026 ◽

2020 ◽

Vol 18 (1) ◽

pp. 232-238

Author(s):

Zhihong Zhang ◽

Gailei Tian ◽

Lin Han

Keyword(s):

Solute Transport ◽

Transport Model ◽

Fluid Velocity ◽

Diffusion Mechanism ◽

Clay Material ◽

Chemical Osmosis ◽

Advection Diffusion Equation ◽

Test Study ◽

Proposed Model ◽

Membrane Effect

AbstractSolute transport through the clay liner is a significant process in many waste landfills or unmanaged landfills. At present, researchers mainly focus on the test study about semi-membrane property of clay material, however, the influence of chemical osmosis caused by membrane effect on solute transport and fluid velocity is insufficient. In this investigation, based on the classical advection-diffusion equation, a one-dimensional solute transport model for low-permeable clay material has been proposed, in which the coupled fluid velocity related with hydraulic gradient and concentration gradient is introduced, and the semi-membrane effect is embodied in the diffusion mechanism. The influence of chemical osmosis on fluid velocity and solute transport has been analyzed using COMSOL Multiphysics software. The simulated results show that chemical osmosis has a significant retarded action on fluid velocity and pollutant transport. The proposed model can effectively reveal the change in process of coupled fluid velocity under dual gradient and solute transport, which can provide a theoretical guidance for similar fluid movement in engineering.

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Development of fuzzy differential quadrature numerical method and its application for uncertainty quantification of solute transport model

Life Cycle Reliability and Safety Engineering ◽

10.1007/s41872-017-0036-2 ◽

2017 ◽

Vol 6 (4) ◽

pp. 249-256 ◽

Cited By ~ 1

Author(s):

D. Datta ◽

T. K. Pal

Keyword(s):

Solute Transport ◽

Uncertainty Quantification ◽

Numerical Method ◽

Transport Model ◽

Differential Quadrature

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Migration of Solutes in Unsaturated, Fractured Rock at Yucca Mountain: Measurements, Mechanisms, and Models

MRS Proceedings ◽

10.1557/proc-412-707 ◽

1995 ◽

Vol 412 ◽

Cited By ~ 1

Author(s):

A. V. Wolfsberg ◽

B. A. Robinson ◽

J. T. Fabryka-Martin

Keyword(s):

Solute Transport ◽

Transport Model ◽

Alternative Hypothesis ◽

Fractured Rock ◽

Yucca Mountain ◽

Nuclear Waste Repository ◽

Transport Studies ◽

And Performance ◽

High Level ◽

A Site

AbstractCharacterization and performance assessment (PA) studies for the potential high-level nuclear waste repository at Yucca Mountain require an understanding of migration mechanisms and pathways of radioactive solutes. Measurements of 36C1 in samples extracted from boreholes at the site are being used in conjunction with recent infiltration estimates to calibrate a site-scale flow and solute transport model. This exercise using the flow and solute transport model, FEHM, involves testing different model formulations and two different hypotheses to explain the occurrence of elevated 36Cl in the Calico Hills unit (CHn) which indicates younger water than in the overlying Topopah Spring unit (TSw). One hypothesis suggests fast vertical transport from the surface via fractures in the TSw to the CHn. An alternative hypothesis is that the elevated 36C1 concentrations reflect rapid horizontal flow in the CHn or at the interface between the CHn and the TSw with the source being vertical percolation under spatially isolated regions of high infiltration or at outcrops of those units. Arguments in favor of and against the hypotheses are described in conjunction with the site-scale transport studies.

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