AfriSam is proud of the significant role they are playing in the construction of the new Nellmapius Bridge overpass, which is part of the Gauteng Freeway Improvement Project (GFIP ) Package C between the Buccleuch and the Brakfontein interchanges on the N1.
Engineering is one of the critical scarce skills in South Africa, as has been proved by the research presented by Allyson Lawless in her Numbers and Needs publications. The situation is, however, not a South African issue only, but a global phenomenon. At the same time it needs to be emphasised that many more engineers are needed in the tertiary institutions to ensure a steady flow of enough adequately trained engineering graduates to meet the skills shortage in industry. However, many academics, and engineering graduates who would otherwise have considered an academic career, are opting for employment in industry, mainly due to the far better salaries on offer outside of academia.
The backbone of any economy lies in a secure and safe water supply, and protection of essential water resources. These requirements are amplified in a largely semi-arid country with a burgeoning economy that is also the economic hub of Africa. South Africa is fast approaching water scarcity, but dares not slacken the pace of economic development when there are still so many in desperate need of economic emancipation. Increasing water scarcity creates enormous challenges in equitably allocating this precious resource to competing sectors. Provision has to be made to sustain essential economic growth both for present and future generations, while at the same time securing basic human needs, meeting international obligations and protecting the resource and the fragile environment that it supports.
The scheme comprises an upper reservoir formed by the Bedford Dam, located in a tributary of the Wilge River, which feeds the Vaal River system, and a lower reservoir formed by the Bramhoek Dam, situated in a tributary of the Klip River that flows into KZN's Thukela River. The two dams, the main focus of this article, are connected by tunnels to a turbine hall.
Various options for the route of the pipeline were looked at from technical, geotechnical, risk, economic, land ownership and environmental points of view. The final route takes the new pipeline from a bulk supply line near Ferncliffe, a natural reserve adjacent to the DV Harris Water Treatment Works, through the Queen Elizabeth Park which is home to the headquarters of Ezemvelo KZN Wildlife, and across the newly established Victoria Country Club Estate, under the N3 highway as it snakes down Town Hill, from Hilton to Pietermaritzburg, and finally, along the Hilton mist-belt grassland biome up to the existing Clarendon Reservoir.
The development of water supply infrastructure is taking place on a very wide scale in South Africa. Large networks of bulk pipelines and reticulation networks are being constructed in many communities, some of which are being managed by district municipalities. One inevitable and important function that comes after the construction of these services is operations and maintenance (O&M). Water loss resulting mainly from poor operations and ill maintenance of the water supply systems cannot be overlooked.
''The issue of climate change and its impacts on water resources is not new, but planners are increasingly concerned about the possible negative impacts of climate change on the utilisable yields from dams and water resource systems,'' said Gerald de Jager, an associate of Jeffares & Green and a key member of the team which undertook the study.
The provision of sufficient potable water in Africa is becoming ever more challenging. And this is no more so than in the case of remote, scattered, or peri-urban communities that are often overlooked in terms of this essential provision.
This article examines some of the features of steel pipelines and of Flowtite glass reinforced plastic (GRP) pipelines that require particular engineering skills, or inspection and supervision of their manufacture and installation.
The Orlando Station upgrade project in Soweto is one of the critical links in the Gauteng public transport chain, particularly in view of the 2010 FIF A World Cup. Many soccer fans will make use of the station to visit the Orlando Soccer Stadium nearby during the tournament, and the station will continue to serve the need for public transport well after the event. The use of Elematic hollow core concrete slabs, supplied by Elematic South Africa (ESA), saved time and kept the project on track for its planned completion time.
Skills shortage drives South African water supply to the brink
Vela VKE assists with water and sanitation for rural schools
Modular Traffic Light System set to revolutionise traffic lights and reduce costs
Twelve-month implementation window for revised paving standard
Robor restructuring enhances service offering
Building site safety hampered by mountains of paperwork
Nelson Mandela Soccer Stadium waterproofed with a.b.e. products
Right on Target in Gauteng