I like Gwede Mantashe - for entertainment purposes. I like him for his political rhetoric and talent for charm, camouflage and counterfeit intelligence. But sometimes his rudder abandons him. And the tongue is already a slippery place. At the ANC's NEC meeting at Luthuli House a few weeks ago, Mantashe flaunted the ANC's humility over the mandate to take South Africa forward. He affirmed that the ANC was the best organisation to lead the country forward. Mantashe was doing well up until this point.
Katanga Mining Limited operates a large-scale copper-cobalt mine complex in the Democratic Republic of the Congo (DRC) through two joint ventures, Kamoto Copper Company (KCC) and the DRC Copper and Cobalt Project. Th is mining operation has the potential of becoming Africa's largest copper producer and the world's largest cobalt producer.
Trevor Manuel, at the time still Minister in the Presidency, immediately grabbed delegates' attention when he opened the Congress in his inimitable forthright and down-to-earth manner. We trust that our readers will enjoy the following lightly edited version of his address
The annual theme for CMP 2013, held in Stellenbosch during June and July last year, was complementary to Trevor Manuel's keynote address, delivered at the Civilution Congress. It was logical that the discussion following his address would provide an excellent opportunity for exploring the findings of the CMP 2013. This proved to be very rewarding, as will be seen from this brief summary.
Many years ago it would have been the norm for children to follow in the footsteps of their parents. However, in the past 20 years this has changed dramatically, with children now actively choosing to follow different paths. One place which seems to buck this trend is Aurecon's water division, where three generations of the Blersch family have been working for the past 68 years.
If the media hype is anything to go by, the Kariba Dam is on the point of collapse and is about to wash away a chunk of southern African real estate along with hundreds of thousands of its inhabitants. At the other extreme some reports of the Zambezi River Authority (ZRA), jointly owned by Zambia and Zimbabwe, indicate that everything is under control. The truth lies somewhere in-between, but how close to which extreme?
In the summer of 1958/59, Nicol van der Walt worked as a trainee engineer during the construction of the Kariba Dam. He was assigned to the Gibb-Coyne-Sogei Consultants' engineer in charge of cement grout treatment of rock strata behind the concrete linings of underground structures and inlet tunnels to the power house.
The Department of Water Affairs (DWA) initiated a nationwide programme aiming to ensure that all South African towns and villages will have access to sufficient and sustainable water supplies well into the future. This complements a similar programme, started in 2005, for metropolitan areas and the large water supply systems. There has been a major emphasis over the past decade on addressing the backlogs in water supply infrastructure mainly in the informal suburbs of urban towns and in rural areas, with many rural water supply schemes commissioned. However, at least 34 million m3/a of water is lost in the Western Cape alone (excluding Cape Town and surrounds) between the abstraction at the water resource and the provision to the end-user. It is clear that Water Conservation and Water Demand Management (WC/WDM) measures should be implemented as a priority in most if not all municipalities.
Consideration of the feasibility of developing the water resource within the Koonap River Valley is not new. Records of investigations into development of the water resource within this area date back to the 1960s, driven by demands from farmers within the valley for greater reliability of irrigation water to develop agriculture. Boreholes located on the proposed Foxwood Dam site outside Adelaide date back to 1962, and a comprehensive agro-economic study was carried out in 1988. However, the proposed scheme never materialised due to insufficient commitment from farmers to develop the required land to make the scheme viable. Further studies of a large-scale dam development were carried out in the 1990s, prompted by renewed farmer interest in reliable irrigation water supply and concern over domestic water supply vulnerability during extended drought periods. However, no significant scheme has yet been developed.
Although the electrification of urban areas and some informal settlements in South Africa has been achieved during recent years, many rural areas still require intervention to provide a reliable and sustainable electricity supply. However, the national electricity grid, managed by Eskom, has for various reasons been experiencing problems, particularly since 2008. Further development of rural electrification is not a high priority at present, due to the shortage in generating capacity available to Eskom. The existing capacity needs to be managed to serve the current users connected to the national grid. However, the primary electricity infrastructure (i.e. coal-fired power stations, major supply lines and distribution of electricity within urban areas) is becoming rapidly insufficient and cannot sustain supply against the demand for electricity from existing (and future) users connected to the national grid.
Pumps are devices that impart energy to a fluid, thereby raising its hydraulic head. There are many different types of pumps. Centrifugal pumps are popular in piped water supply systems. In a water distribution system (WDS), they could be required in a number of situations.
Leaks on small-diameter distribution pipelines are the most common types of leaks that a utility encounters. However, locating and repairing leaks on large-diameter transmission pipelines is also important in maintaining safe and reliable service delivery. These leaks are often more sparse, and therefore more difficult to locate, which can lead to prolonged leakage and extensive water loss.
With the cost of delivering water increasing dramatically in recent years, water utilities need to get the most out of their existing assets, whether it is improving water quality, increasing capacity, extending the life of the asset or lowering energy consumption. Effective programme and portfolio management offers benefits to the planning, delivery and maintenance of water infrastructure. This article discusses the opportunities that owners may wish to consider to help them manage risk and optimise value for money in their investments.
During the following years civil engineers, hydrologists and mathematicians were unable to determine the cause of these anomalies. Now, here in South Africa, as well as in many other countries with dry climates, the demand already exceeds the available secure water supplies from many river systems.
Mining is one of the cornerstones of South Africa's economy and a major employer. However, mining has had significant impacts on the environment and water resources, particularly through Acid Mine Drainage (AMD).
South Africa is at a 'tipping point' in terms of what municipalities need to comply with, what needs to be achieved and what is appropriate and necessary to ensure an acceptable and reliable level of performance. This article looks at some aspects of the recently released report by the Water Research Commission (WRC), in partnership with the South African Local Government Association (SALGA), titled Drivers for Wastewater Technology Selection - Assessment of the Selection of Wastewater Treatment Technology by Municipalities in Relation to the Management Capability and Legislative Requirements by M van der Merwe-Botha and G Quilling.
The development of water and energy resources in Africa is generally well below international norms, and there is a huge development potential in this respect. South Africa is an exception in this respect, as a significant percentage of our national water resources has been developed. The SANCOLD website (www.sancold.org.za) contains a Register of South African Dams. From the size distribution of dams in South Africa in Table 1, it can be seen that 96% of dams are in the small- and medium-sized classes.
The recent launch of the FIDIC Users' Guide 3rd Edition couldn't be more timely. This edition of the world-renowned Brian Totterdill's FIDIC Users' Guide was revised comprehensively by Brian Barr of Brian Barr Consulting Services in the UK, and Leo Grutters, cofounder of GibConsult in Germany, who have more than 40 years' in-depth FIDIC experience. Both are members of the exclusive FIDIC President's List of Approved Dispute Adjudicators, of whom there are only 59 worldwide.