Now showing items 1-10 of 47
Treating high nitrate groundwater using surfactant modified zeolite in fixed bed column
(Taylor and Francis, 2011-05-02)
High levels of nitrate in South African groundwater used for drinking purposes are a cause of concern due to the possible human health risks associated with consuming nitrate contaminated water. In this study, nitrate ...
Preface to the special issue on the tercentenary of the Laplace–Runge–Lenz vector
Integrating quality and cost of surface raw water : upper and middle Vaal water management areas South Africa
(IWA Publishing, 2010)
The user-pays principle encourages use of a water tariff structure that incorporates pollution and/or depletion of a water resource because that water represents a capital resource base. Development of a tool that models ...
Violence at the end of the rainbow
(Taylor and Francis, 2013-02-26)
South Africa presents contradictory images—that of a miracle of reconcilia- tion, the Rainbow Nation, and that of societal decay, evidenced by the police shooting of thirty-six mineworkers at Marikana in 2012. It is ...
On first integrals of second-order ordinary differential equations
Here we discuss first integrals of a particular representation associated with second-order ordinary differential equations. The linearization problem is a particular case of the equivalence problem together with a number ...
Making a case for systems thinking approach to integrated water resources management (IWRM)
(Academic Journals, 2010-04-22)
While definite benefits could be gained from integrating the management of natural and human systems, taking into account the effects of human activities on the environment, the task of operationalising and implementing ...
One-dimensional finite difference approach for sedimentation process in sand filled reservoirs
(Academic Journals, 2011-04-04)
There have been continuing efforts to decrease silt deposits due to interstitial blockage in sand-filled reservoirs. However, estimating weir height to allow for deposition of required grain sizes is difficult. This paper ...
Towards a more sustainable surface raw water tariff structure in the Vaal basin : a situational analysis
(Academic Journals, 2011-04-18)
With an increasingly urbanised population, further study was necessary to determine if water could be used more efficiently by applying efficient tariff structures in combination with decision support tools in the form of ...
Sand water storage : unconventional methods to freshwater augmentation in isolated rural communities of South Africa
(Academic Journals, 2010-10-20)
South Africa water resources are scarce in global terms with mean annual rainfall of about half world average of 860 mm a year. On the other hand, current economy development with resulting contamination of available water ...
The Development of a Language Learning Object Repository (LLOR) for second language teachers in KwaZulu-Natal, South Africa
(International Association of Technology, Education and Development, 2012)
A Language Learning Object Repository (LLOR) was developed in an attempt to respond to the challenge of increasing costs of printed educational resources, the lack of which results in generally poor performances by second ...