Author:Mabhali, Luyolo AB; Sacks, N; Pityana, Sisa LDate:Mar 2012Laser surface alloying of aluminium AA1200 was performed with a 4kW Nd:YAG laser and the impact resistance of the alloys was investigated. The alloying powders were a mixture of Ni, Ti and SiC in different proportions. Surfaces reinforced ...Read more
Author:Blight, JJ; Gush, Mark B; Le Maitre, David C; Jewitt, GPWDate:Sep 2005Disruption of the hydrological regime caused by afforestation is well documented. Several sets of experimental catchments were set up in South Africa between 1935 and 1980 specifically to quantify such impacts. Data emanating from these ...Read more
Author:Le Maitre, David C; Görgens, A; Howard, G; Walker, NDate:Oct 2019A key motivation for managing invasive alien plant (IAP) species is their impacts on streamflows, which, for the wetter half of South Africa, are about 970 m3·ha-1·a-1 or 1 444 mill. m3·a-1 (2.9% of naturalised mean annual runoff), comparable ...Read more
Author:Kusangaya, S; Warburton, ML; Archer, Emma RM; Jewitt, GPWDate:Oct 2013The Intergovernmental Panel on Climate Change concluded that there is consensus that the increase of atmospheric greenhouse gases will result in climate change which will cause the sea level to rise, increased frequency of extreme climatic ...Read more
Author:Tozuka, T; Abiodun, BJ; Engelbrecht, FADate:Mar 2013This study examines southern African summer rainfall and tropical temperate troughs (TTTs) simulated with three versions of an atmospheric general circulation model differing only in the convection scheme. All three versions provide realistic ...Read more
Author:Mambo, JDate:Mar 2012AIDS mortality, its linkages as a determinant and consequence of food security and its impact on natural resource utilisation by mainly rural populations, has not been well researched, especially their effects on rural livelihoods. Determining ...Read more
Author:Le Maitre, David C; Gush, Mark B; Dzikiti, SebinasiDate:May 2015There have been many studies of the diverse impacts of invasions by alien plants but few have assessed impacts on water resources. We reviewed the information on the impacts of invasions on surface runoff and groundwater resources at stand ...Read more
Author:Chamier, J; Schachtschneider, K; Le Maitre, David C; Ashton, PJ; Van Wilgen, BWDate:Apr 2012We review the current state of knowledge of quantified impacts of invasive alien plants on water quality, with a focus on South Africa. In South Africa, over 200 introduced plant species are regarded as invasive. Many of these species are ...Read more
Author:Kgaphola, Motsoko J; Ramoelo, A; Odindi, J; Mwenge Kahinda, Jean-Marc; Seetal, Ashwin RDate:Oct 2021Interaction between biophysical variables and socioeconomic conditions are far more complex and affect land cover and quality. These are aggravated by global climate change and climate variability in semi-arid regions. Therefore, the study ...Read more
Author:Arabi, Sumaiya; Nahman, AntonDate:May 2020In addition to its direct impacts on marine ecology and biota, marine plastic debris can affect the delivery of ecosystem services, with resulting impacts on human well-being, society and the economy. It is important to quantify these impacts ...Read more
Author:Truter, JC; Van Wyk, JH; Oberholster, Paul J; Botha, AMDate:Feb 2014Acid mine drainage (AMD) is a global environmental concern due to detrimental impacts on river ecosystems. Little is however known regarding the biological impacts of neutralized AMD on aquatic vertebrates despite excessive discharge into ...Read more
Author:Oelofse, Suzanna HH; Mouton, CDate:Oct 2014The waste sector has been identified as a sector which can contribute towards South Africa’s economic growth and the creation of green jobs. Policies and regulations are often identified as a potential limiting factor for growth in the waste ...Read more
Author:Muswema, Aubrey P; Chetty, P; Okem, P; Oelofse, Suzanna HHDate:Oct 2018This case study is an overview investigating the interaction between severe weather incidents and solid waste management. The study seeks to understand how extreme weather events affect the implementation of the waste hierarchy (an approach ...Read more
Author:Muthige, Mavhungu S; Engelbrecht, Francois ADate:Oct 2016Regional climate models (RCMs) provide finer-scale simulations than those of Global climate models (GCMs), whilst being forced by the output of the host GCMs. In this study, we examine the influence of various strengths of spectral nudging ...Read more
Author:Cousins, CCDate:2000This research was done so as to understand key issues in the stakeholder consultation process undertaken as a component of the process of forest certification under the Forest Stewardship Council FSC), and to understand the nature of the ...Read more