Experimental and numerical study of solute transport through saturated fractured porous aquifer
The evaluation of groundwater pollution in different subsurface media has always been a challenging task. The knowledge required for the conceptual basis for analysis is often insufficient. Site specific data are usually not available. In fractured formations further difficulties arise since contami...
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Memorial University of Newfoundland
1997
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ftmemorialuniv:oai:research.library.mun.ca:6621 2023-10-01T03:57:38+02:00 Experimental and numerical study of solute transport through saturated fractured porous aquifer Amoah, Nelson 1997 application/pdf https://research.library.mun.ca/6621/ https://research.library.mun.ca/6621/1/NelsonAmoah_1.pdf https://research.library.mun.ca/6621/3/NelsonAmoah_1.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/6621/1/NelsonAmoah_1.pdf https://research.library.mun.ca/6621/3/NelsonAmoah_1.pdf Amoah, Nelson <https://research.library.mun.ca/view/creator_az/Amoah=3ANelson=3A=3A.html> (1997) Experimental and numerical study of solute transport through saturated fractured porous aquifer. Doctoral (PhD) thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1997 ftmemorialuniv 2023-09-03T06:45:57Z The evaluation of groundwater pollution in different subsurface media has always been a challenging task. The knowledge required for the conceptual basis for analysis is often insufficient. Site specific data are usually not available. In fractured formations further difficulties arise since contaminant migration patterns are influenced in a complex way by the variability of fracture characteristics. In addition many numerical models have been found to be inefficient in handling the equations governing subsurface contaminant transport. This means that the investigator is confronted with several sources of uncertainties arising from both the input data and the numerical model itself. -- This thesis presents a field experiment and numerical study of solute transport through a saturated fractured aquifer located in St. John's, Newfoundland, Canada. The aquifer at the test site consists of a thin glacial till overlying a fractured bedrock. The investigation comprised two parts. The first part involved several months of groundwater level monitoring, in situ tests for hydraulic conductivity and study of the groundwater chemistry. High spatial variability of hydraulic conductivity in the bedrock aquifer was observed. The second part involved two natural gradient tracer tests. Experimental results indicate that there is limited hydraulic communication between the overlying till and the fractured bedrock. Tracer migration patterns in the bedrock suggest a dense network of highly interconnected fractures which cannot be represented on individual scale. Tracer migration in the bedrock showed no evidence of flow channeling. The concentration distribution has been represented by breakthrough curves. -- Knowledge from the field study has been used to develop an efficient numerical model for solute transport based on the advection-dispersion equation. The numerical model was based on the dual reciprocity boundary element method (DRBEM). A new approach in the application of this technique to a class of non-linear, ... Thesis Newfoundland Memorial University of Newfoundland: Research Repository Canada |
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Memorial University of Newfoundland: Research Repository |
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English |
description |
The evaluation of groundwater pollution in different subsurface media has always been a challenging task. The knowledge required for the conceptual basis for analysis is often insufficient. Site specific data are usually not available. In fractured formations further difficulties arise since contaminant migration patterns are influenced in a complex way by the variability of fracture characteristics. In addition many numerical models have been found to be inefficient in handling the equations governing subsurface contaminant transport. This means that the investigator is confronted with several sources of uncertainties arising from both the input data and the numerical model itself. -- This thesis presents a field experiment and numerical study of solute transport through a saturated fractured aquifer located in St. John's, Newfoundland, Canada. The aquifer at the test site consists of a thin glacial till overlying a fractured bedrock. The investigation comprised two parts. The first part involved several months of groundwater level monitoring, in situ tests for hydraulic conductivity and study of the groundwater chemistry. High spatial variability of hydraulic conductivity in the bedrock aquifer was observed. The second part involved two natural gradient tracer tests. Experimental results indicate that there is limited hydraulic communication between the overlying till and the fractured bedrock. Tracer migration patterns in the bedrock suggest a dense network of highly interconnected fractures which cannot be represented on individual scale. Tracer migration in the bedrock showed no evidence of flow channeling. The concentration distribution has been represented by breakthrough curves. -- Knowledge from the field study has been used to develop an efficient numerical model for solute transport based on the advection-dispersion equation. The numerical model was based on the dual reciprocity boundary element method (DRBEM). A new approach in the application of this technique to a class of non-linear, ... |
format |
Thesis |
author |
Amoah, Nelson |
spellingShingle |
Amoah, Nelson Experimental and numerical study of solute transport through saturated fractured porous aquifer |
author_facet |
Amoah, Nelson |
author_sort |
Amoah, Nelson |
title |
Experimental and numerical study of solute transport through saturated fractured porous aquifer |
title_short |
Experimental and numerical study of solute transport through saturated fractured porous aquifer |
title_full |
Experimental and numerical study of solute transport through saturated fractured porous aquifer |
title_fullStr |
Experimental and numerical study of solute transport through saturated fractured porous aquifer |
title_full_unstemmed |
Experimental and numerical study of solute transport through saturated fractured porous aquifer |
title_sort |
experimental and numerical study of solute transport through saturated fractured porous aquifer |
publisher |
Memorial University of Newfoundland |
publishDate |
1997 |
url |
https://research.library.mun.ca/6621/ https://research.library.mun.ca/6621/1/NelsonAmoah_1.pdf https://research.library.mun.ca/6621/3/NelsonAmoah_1.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/6621/1/NelsonAmoah_1.pdf https://research.library.mun.ca/6621/3/NelsonAmoah_1.pdf Amoah, Nelson <https://research.library.mun.ca/view/creator_az/Amoah=3ANelson=3A=3A.html> (1997) Experimental and numerical study of solute transport through saturated fractured porous aquifer. Doctoral (PhD) thesis, Memorial University of Newfoundland. |
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1778529506930196480 |