Modeling of Groundwater Flow and Contaminant Transport in Two-Dimensional Geometries in an Unconfined Aquifer

2014 ◽  
Vol 1010-1012 ◽  
pp. 1023-1027
Author(s):  
Fouad Dimane ◽  
Issam Hanafi ◽  
Abdelouahad El Himri ◽  
Khadija Haboubi ◽  
Francisco Mata Cabrera ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Steady State ◽  
Groundwater Flow ◽  
Contaminant Transport ◽  
Cross Section ◽  
Flow System ◽  
Unconfined Aquifer ◽  
Two Dimensional ◽  
Groundwater Flow System ◽  
Subsurface Fluid

Models of groundwater flow are widely used for a variety of purposes ranging from water supply studies to designing contaminant cleanup. In general, groundwater flow system can be divided into steady-state and transient. In the present work, we investigate the usefulness of finite element method in modelling of steady-state subsurface fluid flow and transient solute transport along a vertical cross section in an unconfined aquifer. Details are explained on numerical approximations leading to different numerical results. Extensions for pollutant transport are mentioned.

scholarly journals Parametrization of Contaminant Transport through an Anisotropic Unconfined Aquifer

1980 ◽  
Vol 11 (3-4) ◽  
pp. 187-208 ◽  
Author(s):  
A.G. Bobba ◽  
R.P. Bukata
Keyword(s):  
Steady State ◽  
Contaminant Transport ◽  
Deterministic Model ◽  
Velocity Ratio ◽  
Unconfined Aquifer ◽  
Chemical Adsorption ◽  
Adsorption Coefficient ◽  
Two Dimensional ◽  
Subsurface Transport

A duo two-dimensional deterministic model of contaminant transport through a homogeneous and anisotropic unconfined aquifer is developed. This model is then utilized to evaluate the effects of such hydrogeologic parameters as convection, dispersion, and chemical adsorption on the build-up, steady-state, and recovery phases of the subsurface contaminant transport. Figures are presented illustrating the dependence of the subsurface transport upon principal velocity ratios, dispersivity ratios, and the adsorption coefficient. The results clearly indicate a distinct dominance of the principal velocity ratio (i.e., degree of aquifer anisotropy) on the transport of subsurface contaminants.

The Numerical Analysis of Contaminant Migration from Sanitary Landfill Sites

1977 ◽  
Vol 12 (1) ◽  
pp. 233-255
Author(s):  
J.F. Sykes ◽  
A.J. Crutcher
Keyword(s):  
Contaminant Transport ◽  
Cross Section ◽  
Element Model ◽  
Sanitary Landfill ◽  
Saturated Porous Media ◽  
Two Dimensional ◽  
Contaminant Migration ◽  
Southern Ontario ◽  
Galerkin Finite Element ◽  
Chloride Concentrations

Abstract A two-dimensional Galerkin finite element model for flow and contaminant transport in variably saturated porous media is used to analyze the transport of chlorides from a sanitary landfill located in Southern Ontario. A representative cross-section is selected for the analysis. Predicted chloride concentrations are presented for the cross section at various horizon years.

scholarly journals Implications of Self-Potential Distribution for Groundwater Flow System in a Nonvolcanic Mountain Slope

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Tada-nori Goto ◽  
Kazuya Kondo ◽  
Rina Ito ◽  
Keisuke Esaki ◽  
Yasuo Oouchi ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
General Trend ◽  
Flow System ◽  
Ground Surface ◽  
Mountain Slope ◽  
Infiltration Process ◽  
Groundwater Flow System ◽  
Self Potential ◽  
Sp Anomaly ◽  
Fft Analysis

Self-potential (SP) measurements were conducted at Mt. Tsukuba, Japan, which is a nonvolcanic mountain, to infer groundwater flow system in the mountain. Survey routes were set around the northern slope, and the reliability of observed SP anomaly was checked by using SP values along parallel survey routes; the error was almost within 10 mV. The FFT analysis of the spatial SP distribution allows us a separation of raw data into two components with shorter and longer wavelength. In the shorter (altitudinal) wavelength than ∼200 meters, several positive SP peaks of more than 100 mV in magnitude are present, which indicate shallow perched water discharges along the slope. In the regional SP pattern of longer wavelength, there are two major perturbations from the general trend reflecting the topographic effect. By comparing the SP and hydrological data, the perturbation around the foothill is interpreted to be caused by heterogeneous infiltration at the ground surface. The perturbation around the summit is also interpreted to be caused by heterogeneous infiltration process, based on a simplified numerical modeling of SP. As a result, the SP pattern is well explained by groundwater flow and infiltration processes. Thus, SP data is thought to be very useful for understanding of groundwater flow system on a mountain scale.

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