In the municipal context, water and sewer infrastructures consist of pipes, pump stations, reservoirs, water care works and wastewater treatment plants. Planning in this sector involves checking the sizes and capacities of the existing infrastructure, followed by the preparation of a master plan which defines the placement and sizing of improvements and additions to the existing system to meet the requirements of the future system after the expected developments have taken place.
The Berg Water Project comprises the 65 m high Berg River Dam and the Supplement Scheme situated 12 km downstream that will pump water back into the dam during the winter months. The outlet works of the Berg River Dam were designed to release both the low flow reserve and the high flow reserve with provision for a peak release of 160 m3/s. This is the first dam in South Africa with provision for both low and high flow reserve releases and these will be implemented for the first time during the winter of 2008. This article briefly describes the release tool which has been developed to assist the operators of the Berg River Dam to make the reserve releases
One of the key projects identified was the construction of a dam on the upper reaches of the Berg River. DWAF initiated the environmental impact assessment (EIA) process and the EIA report was produced for decision-making in 1996. The Department of Environmental Affairs and Tourism (DEAT) issued the record of decision (ROD) in 1999. The ROD stipulated that the dam should be designed so as to ensure flows for the ecological reserve.
The need for the study was driven by the fact that a number of towns in the study area were experiencing serious periodic water shortages, mainly because of substantial growth in urban water usage; high ecological reserve requirements associated with the ecologically important coastal rivers; insufficient yield of the existing water sources; and inadequate capacity of the bulk water supply infrastructure.
The aim of the feasibility study was to verify the technical, environmental, social, economic and financial viability of raising Clanwilliam Dam. The study also aimed to determine the optimal height for such raising, if found to be viable.
The Vaal River Eastern Subsystem Augmentation Project (VRESAP), also known as the Vaal Pipeline Project, is being implemented to meet the growing water demands of Eskom and Sasol in the Mpumalanga Highveld region. The scheme will transfer water via a 121 km pipeline from the Vaal Dam near Vaal Marina to the Knoppiesfontein diversion structure which discharges into either the Trichardtsfontein or Bosjesspruit dams near Secunda. VRESAP will augment the yield of the Vaal River Eastern Subsystem (VRESS) by 160 million m3 per year.
The main objectives of the conference are to provide a forum for water distribution professionals to interact and share knowledge, stimulate scientific collaboration, encourage and foster debate on new ways to supply and manage drinking water systems, and bring together researchers and practitioners from developing and developed countries.
The urgency to repair these reservoirs was further compounded by a need to transfer ownership of the reservoirs from the Local Water Committees (LWC), supported by Umgeni Water to the newly appointed Water Services Authority (WSA) and Water Services Provider (WSP), Ilembe District Municipality.
The Amathole District Municipality, which appointed Stemele Bosch Africa (SBA), to design and implement this water supply scheme, originally anticipated this project would provide potable water to about 35 000 people living in the immediate area.
Upgrading and reconstructing the former FNB stadium to create the new Soccer City involved a great deal of geotechnical work due to the difficult ground conditions encountered there. Ground Engineering (GEL), a division of Grinaker-LTA, has currently installed foundation piling for the stands and the integrated roof structure, as well as lateral support for three access tunnels and a parkade - all with a contract value of approximately R100 million.
The wider portions of the Roodepoort and Randburg areas within Johannesburg Water's (JW) area of service have been supplied by water from the Rand Water's Meredale System, and specifically through direct feeds from the 1 000 mm diameter F34 pipeline linked to the Waterval Reservoir Sub-system. At the termination of the F34 pipeline, Rand Water owns a vacant site where the three main Rand Water meters supplying Randburg (JW's Boschkop, Honeydew and Randpark Ridge zones - BHR) are situated.
Cape Town Container Terminal's R4,2 billion expansion programme is moving full steam ahead since commencing mid-January 2008, despite early delays from the strong 'Cape Doctor' wind which hampered the terminal's productivity earlier this year.