NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Distance weighted method of characteristics solution for solute transport in groundwater
dc.contributor.advisor | Reddell, Donald L. | |
dc.creator | Prathapar, Sanmugam Ahembaranathan | |
dc.date.accessioned | 2020-09-02T21:04:48Z | |
dc.date.available | 2020-09-02T21:04:48Z | |
dc.date.issued | 1986 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/DISSERTATIONS-23578 | |
dc.description | Typescript (photocopy). | en |
dc.description.abstract | Method of characteristics (MOC) solutions are widely employed in solute transport models of groundwater to estimate tracer concentration. The conventional approach to obtain average tracer concentration for the cell is to arithmetically average the tracer concentration of the moving points within the cell during a particular time step. This requires a large number of moving points and or small cell dimensions to yield satisfactory results. A weighted average using an 'area of influence' for each moving point to estimate the average cell tracer concentration has been proposed and proven effective for steady, uniform flow fields. However, the calculation of an 'area of influence' is difficult for unsteady, non uniform flow fields. Utilization of a 'distance based' weighting function to estimate the average tracer concentration of a cell is proposed in this study. Two inverse and two exponential distance based weighting functions were evaluated. All four weighting functions performed similarly. Hence a quasi error analysis was performed and the inverse weighting function which resulted in a minimal absolute error was chosen for further study. This weighting function performed better than, or as well as the traditional arithmetically averaged routine, depending on the nature of the problem studied. The effect of two forms of moving point introduction, a geometrically uniform pattern and a random pattern on estimation of average tracer concentration of a cell was studied. For uniform, steady flow fields, the geometrically uniform pattern of introducing moving points was found suitable. | en |
dc.format.extent | xi, 99 leaves | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | Agricultural Engineering | en |
dc.subject | Groundwater flow | en |
dc.subject | Mathematical models | en |
dc.subject | Groundwater | en |
dc.subject | Pollution | en |
dc.subject | Mathematical models | en |
dc.subject.lcsh | Groundwater | en |
dc.subject.lcsh | Pollution | en |
dc.subject.lcsh | Mathematical models | en |
dc.subject.lcsh | Groundwater flow | en |
dc.subject.lcsh | Mathematical models | en |
dc.title | Distance weighted method of characteristics solution for solute transport in groundwater | en |
dc.type | Thesis | en |
thesis.degree.grantor | Texas A&M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.name | Ph. D | en |
dc.contributor.committeeMember | Dornenico, Patrick A. | |
dc.contributor.committeeMember | McFarland, Marshall J. | |
dc.contributor.committeeMember | Newton, H. Joseph | |
dc.contributor.committeeMember | Richardson, Clarence W. | |
dc.type.genre | dissertations | en |
dc.type.material | text | en |
dc.format.digitalOrigin | reformatted digital | en |
dc.publisher.digital | Texas A&M University. Libraries | |
dc.identifier.oclc | 18041780 |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004) -
Water-Related Theses and Dissertations
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.