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Modelling the contaminant attenuation capacity of sandy soils in the vadose zone
Dissertation (Ph. D. Agric.) -- University of Stellenbosch, 1997.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613988788895744 |
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| access_status_str | Open Access |
| author | Eigenhuis, Bernhard |
| author2 | Gorgens, A. H. M. |
| author_browse | Eigenhuis, Bernhard Gorgens, A. H. M. |
| author_facet | Gorgens, A. H. M. Eigenhuis, Bernhard |
| author_sort | Eigenhuis, Bernhard |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Dissertation (Ph. D. Agric.) -- University of Stellenbosch, 1997. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/55587 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:44:53.996Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/55587 Modelling the contaminant attenuation capacity of sandy soils in the vadose zone Eigenhuis, Bernhard Gorgens, A. H. M. Moolman, J. H. Stellenbosch University. Faculty of AgriSciences. Dept. of Soil Science. Soil pollution -- Mathematical models Sandy soils Zone of aeration Groundwater -- Pollution -- Mathematical models Dissertations -- Agriculture Dissertation (Ph. D. Agric.) -- University of Stellenbosch, 1997. Soil and especially groundwater pollution are becoming serious environmental issues. In South Africa the increasing need for safe drinking water, as well as water for agricultural and industrial purposes, necessitates further development of groundwater resources. Once contaminated, groundwater is far more difficult to rehabilitate than surface water. The contaminant attenuation capacity of soil is an important factor in the choice of the most suitable terrain for the disposal of, for example, municipal or industrial waste. This attenuation capacity influences the degree of environmental pollution of both groundwater and soils and can be estimated using numerical models. Such models provide an efficient and economical method of evaluating suitable terrains in terms of attenuation capacity. This modelling project formed part of a larger Water Research Commission project, initiated to produce groundwater vulnerability maps for South Africa. The first phase of the project consisted of identifying and evaluating a numerical model that would be capable of successfully simulating the movement of water and solutes in the vadose zone. A holistic approach was followed to identify the parameters influencing attenuation capacity. The available numerical models were compared in terms of their accommodation of physical, chemical, biological and climatic parameters, as well as additional selection criteria. The first phase was completed by performing a sensitivity analysis on the selected model CHAIN 2D. The most important parameters influencing the attenuation of solutes in soils were found to be soil moisture retention, saturated hydraulic conductivity, climate, soil bulk density and the adsorption isotherm distribution coefficient. In addition the software package MODEL2D was developed to assist the user in compiling the input files for CHAIN 2D and to rearrange the resulting simulation data for use in the SURFER graphical presentation software package, as well as for the GIS-INFO geographical information system. The ETO program was developed to calculate evaporation data from climatic data, where needed. Doctoral 2012-08-27T11:37:07Z 2012-08-27T11:37:07Z 1997 Thesis http://hdl.handle.net/10019.1/55587 en Stellenbosch University 228 pages : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Soil pollution -- Mathematical models Sandy soils Zone of aeration Groundwater -- Pollution -- Mathematical models Dissertations -- Agriculture Eigenhuis, Bernhard Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title | Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title_full | Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title_fullStr | Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title_full_unstemmed | Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title_short | Modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| title_sort | modelling the contaminant attenuation capacity of sandy soils in the vadose zone |
| topic | Soil pollution -- Mathematical models Sandy soils Zone of aeration Groundwater -- Pollution -- Mathematical models Dissertations -- Agriculture |
| url | http://hdl.handle.net/10019.1/55587 |
| work_keys_str_mv | AT eigenhuisbernhard modellingthecontaminantattenuationcapacityofsandysoilsinthevadosezone |