A numerical study of the influence of sediment compaction caused by groundwater pumping on contaminant transport

2021 ◽  
Vol 14 (8) ◽  
Author(s):  
Qingshan Ma ◽  
Howard K.W.F ◽  
Junyuan Jia
Keyword(s):  
Contaminant Transport ◽  
Numerical Study ◽  
Groundwater Pumping ◽  
Sediment Compaction

Fluid Flow, Heat and Contaminant Transport in a Ventilated Enclosure due to the Presence of Thermosolutal Body

2017 ◽  
Author(s):  
Neha Gupta ◽  
Ameeya Nayak
Keyword(s):  
Mass Transfer ◽  
Fluid Flow ◽  
Contaminant Transport ◽  
Richardson Number ◽  
Numerical Study ◽  
Vertical Wall ◽  
Air Distribution ◽  
The Core ◽  
Flow Heat ◽  
Higher Temperature

A numerical study is performed for the fluid flow, heat and mass transfer in a ventilated enclosure where a thermally and solutally activated square block is placed for heat and solute exchanges. The block is maintained with higher temperature and concentration than that of inlet flow and the walls are impermeable and adiabatic to heat and solute. Cold fluid is entered through a slot of left vertical wall and flushes out at the different slots of opposite wall to study the mixed air distribution due to the thermosolutal source present in the core of the enclosure. The dynamic, thermal and solutal transport phenomena are computationally visualized through the streamlines, isotherms and iso-concentration lines. The efficient cooling activities are studied by changing the locations of inlet and outlet ports with the variation of Richardson number (Ri) and Reynolds number (Re) for a fixed Prandtl number (Pr = 0.71).

scholarly journals Impact of Pumping Rate on Contaminant Transport in Groundwater—A Numerical Study

Hydrology ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 103
Author(s):  
Hossein Ahmadi ◽  
Fouad Kilanehei ◽  
Mohammad Nazari-Sharabian
Keyword(s):  
Groundwater Flow ◽  
Travel Time ◽  
Contaminant Transport ◽  
Numerical Study ◽  
Numerical Technique ◽  
Three Dimensional ◽  
Aquifer Vulnerability ◽  
Well Water ◽  
Pumping Rate ◽  
Pump Flow Rate

Public supply wells are commonly considered one of the most significant sources of freshwater on Earth. Therefore, potential well water contamination can conceivably be regarded as a crucial issue that is closely correlated with both environmental protection and water demand. In the present study, a three-dimensional numerical model is developed to simulate unsteady and spatially varying groundwater flow, along with contaminant migration. Besides, the proposed model is capable of investigating well water quality by the change of the wells’ pumping rates. The developed model uses a finite-volume time splitting numerical technique to solve governing groundwater flow and soluble contaminant transport equations. Comparison of the numerical simulation results with analytical solutions, as well as experimental and field data, clearly demonstrates the satisfactory performance of the present model. The fundamental aim of the study is to evaluate the effect of pumping rate and its variations on pollution migration through saturated porous media. To meet this purpose, contaminant concentrations and contaminants’ travel time were studied under different pump flow rate conditions. The modeling results revealed that choosing an optimum range for the pumping rate increases contaminant travel time and reduces aquifer vulnerability.

scholarly journals 3-D Simulations of Groundwater Utilization in an Urban Catchment of Berlin, Germany

2018 ◽  
Vol 45 ◽  
pp. 177-184 ◽  
Author(s):  
Nasrin Haacke ◽  
Maximilian Frick ◽  
Magdalena Scheck-Wenderoth ◽  
Michael Schneider ◽  
Mauro Cacace
Keyword(s):  
Contaminant Transport ◽  
Numerical Models ◽  
Regional Scale ◽  
Hydraulic Head ◽  
Groundwater Pumping ◽  
Urban Catchment ◽  
Groundwater Circulation ◽  
Hydraulic Head Distribution ◽  
Variable Production ◽  
Model Approach

Abstract. The objective of this study is to analyze the influence of groundwater pumping on predicted groundwater circulation below the urban center of Berlin, Germany, by 3-D numerical models. Of particular interest are hydraulic head distributions, the related shallow-deep groundwater interactions and their scale dependency within an anthropogenically overprinted environment. For this purpose, two model scenarios are investigated. In the first model realization (Model 1), the effects of groundwater pumping are implemented by imposing a fixed, though spatially variable, hydraulic head distribution over the whole model area, therefore implicitly taking into account the effects of pumping activities. In the second model realization (Model 2), these effects are considered in an explicit manner by imposing variable production rates in locations where pumping activities are ongoing. The results of this study show, that both models predict similar hydraulic head distributions on the regional scale (i.e. urban wide). Locally, differences in the extent, volume and depth of emerging depression cones can be observed. This is manifested in differences in predicted fluid flow patterns supporting or refuting the possibility of contaminant transport in an area of importance for groundwater production (Lower Havel). Herein, the second model approach outlines the necessity of implementing wells as an active parameter to reproduce observed fluid pathways.

scholarly journals Numerical Study of Contaminant Transport in Fractured Porous Rock with Distance Dependent Dispersivity

2016 ◽  
Vol 5 (2) ◽  
pp. 46-57
Author(s):  
Pramod Kumar Sharma ◽  
Sourabh Kakani ◽  
Sanjay Kumar Shukla
Keyword(s):  
Contaminant Transport ◽  
Numerical Study ◽  
Porous Rock
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