Now showing items 11-20 of 37
Site characterisation of LNAPL-contaminated fractured-rock aquifer
(University of the Free State, 2009-08)
Site characterisation aims to obtain fundamental data needed to describe the subsurface flow pathways and distribution of contaminants. The study describes the application of various geohydrological techniques as complimentary ...
The description of physico-chemical processes in coal mine spoils and associated production of acid mine drainage
(University of the Free State, 2007-05)
English: In the first part of this study the typical physico-chemical processes involved in Acid Mine Drainage (AMD) generation were discussed. This included a detailed description of mineralogical reactions, oxygen migration ...
Aquifer parameter estimation in fractured-rock aquifers using a combination of hydraulic and tracer tests
(University of the Free State, 2002-08)
English: Water resources in South Africa are already being stressed and the country is slowly becoming a water-scarce country. This presents a challenge to all water resource managers to ensure that the basic water needs ...
Managing the impact of irrigation on the Tosca-Molopo groundwater resource
(University of the Free State, 2005-05)
From 1990 to 2000 rapid development of irrigation from groundwater resources in dolomite aquifers took place in the Tosca Molopo area. This abstraction lead to water levels declining 10 to 20m regionally and up to 60m ...
Estimation of the preliminary groundwater reserve using numerical models
(University of the Free State, 2000-06)
English: The Water Act requires the determination of the Groundwater Reserve to secure the basic human needs and to protect the environment (aquatic ecosystems in terms of the Act). In other words, it is necessary to ...
Tracing water and nitrate movement through soils with bromide
(University of the Free State, 2003-01)
English: The pollution of surface and subsurface water is a serious problem worldwide. To clean up a once polluted groundwater source is very difficult and costly, if not impossible. Almost all the sources responsible ...
The groundwater flow regime of the Kombat Aquifer, Namibia
(University of the Free State, 2009-11-27)
The Kombat Aquifer, as investigated in this study, comprises the dolomite of the upper and lower Otavi Group, encompassing a radius of about 10 km around Kombat Mine. Groundwater flow controls, structural influence, and ...
A critical review of recharge estimation methods used in Southern Africa
(University of the Free State, 2003-12)
English: A new stable isotope-based technique, the Modified Amount Effect (MAE) Method, was developed during this investigation. This technique provides insight into episodic recharge processes by estimating the proportion ...
Manual on pumping test analysis in fractured rock aquifers
(University of the Free State, 2000-11)
English: With the depletion of surface water resources in South Africa the utilisation of groundwater as the only potable water resource for communities in some rural areas is quickly becoming a reality. Failure of this ...
Site characterisation for LNAPLs investigation using electrical resistivity tomography (ERT) survey
(University of the Free State, 2009-11)