The Kunene River Scheme Introduction Water Demand Water Infrastructure Dams and Associated the Kunene River Scheme

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The Kunene River Scheme Introduction Water Demand Water Infrastructure Dams and Associated the Kunene River Scheme About Tutorial Glossary Documents Images Maps Google Earth Please provide feedback! Click for details Resource Management You are here: Home>Resource Management >Water Infrastructure >Dams and Associated Infrastructure >The Kunene River Scheme Introduction Water Demand Water Infrastructure Dams and Associated The Kunene River Scheme Infrastructure The Kunene River Scheme In theThird Water Use Agreement of 1969 the Governments of Portugal and South Infrastructure for Africa outlined the first phase of their joint development of the water resources of the Hydropower in Angola Kunene River. The agreement outlined a plan to manage the river as an integrated Infrastructure for Water system enabling the development of a hydropower project at Ruacana. This resulted in Supply the construction of three major structures on the river in the 1970s comprising the Water Security Kunene River Scheme, in addition to the already existing Weir and Power Plant at Water Storage & Flow Matala . These three structures, built on the Upper,Middle andLower Kunene , were to Explore the sub- basins of the Control function as an integrated system, ensuring regular flow conditions for constant Kunene River Bulk Transfer Schemes electricity generation. The three structures are the Gove dam, the incomplete Calueque Groundwater Services & weir (which also facilitates drinking water supply to the northern parts of Namibia as Infrastructure well as water supply to irrigation projects) and the Ruacana weir and hydropower Irrigation Infrastructure plant 170 km upstream of the proposed Baynes Site (ERM 2009). Operation and Maintenance of The elements of the Kunene River Scheme are: Infrastructure Rehabilitation and Future The Gove Dam Development Wastewater Infrastructure Located in the upper reaches of the catchment, 120 km south of Huambo, the Gove The Value of Water dam was the first component of the Kunene River Scheme to be completed in 1975, Video Interviews about the Resource Monitoring and thus facilitated the construction of the weirs at Calueque and Ruacana. The integrated and transboundary Research & Development reservoir behind the dam has a storage capacity of around 2 570 Mm³ although the management of the Kunene References dam was seriously damaged during the war. The average annual flow of the river at River basin Gove is about 1 600 Mm³ / year. View information on the dams and weirs of the Kunene Basin Examine the virtual water trade and water footprints of SADC Outlet at the Gove dam. countries Source: Vogel 2010 ( click to enlarge ) The primary design function of the Gove dam was to: Accommodate flood waters during the rainy season and thus regulate the Flow along the entire Kunene throughout the year to enable optimal power generation downstream at the Ruacana power station. In addition to this, the Gove dam was also intended to: Generate hydroelectric power for local consumption, particularly for the Explore how hydroelectric dams provinces of Huambo and Bié. An installed capacity of 60 MW will finally be work Generate hydroelectric power for local consumption, particularly for the Explore how hydroelectric dams provinces of Huambo and Bié. An installed capacity of 60 MW will finally be work available from February 2011; and send a general website store water and supply irrigation needs along the middle Kunene River in comment Angola. report a specific The war in Angola prevented the Gove dam from being used to regulate the flow of comment about this the Kunene as planned, and the structure was damaged in two attacks, with the second page attack in 1990 causing particular damage. The Gove dam and associated infrastructure is currently under Rehabilitation to guarantee it functions as foreseen. A regulated flow in the Kunene will not only benefit the Ruacana power station but also useful for example for the planned power stations at Jamba Ia Mina and Jamba Ia Oma. Calueque Dam The dam at Calueque lies at the lower end of the Middle Kunene around 540 km downstream from the Gove dam. Work on the dam started in 1972 and was 70 % complete when work was abandoned in 1976 due to the war although it is partially functional, serving to store considerably less than the original design volume of 475 Mm³. In 1988 the weir was severely damaged during an attack. The Calueque dam was designed with two main functions in mind: To provide further regulation of the flow of the Kunene and enable optimal electricity generation downstream at Ruacana; and To store water for bulk transfer for human and animal requirements and for irrigation in northern Namibia In addition to this, the dam serves to store water for domestic water supply and local development in Angola. The existing agreement between the governments of Angola and Namibia allows for a maximum abstraction rate of 6 m³ / s for uses in northern Namibia in this Bulk Transfer Scheme . The Calueque dam is currently being repaired in order to fully function as foreseen, with an extension in its function planned with the addition of hydroelectric generators. The Calueque weir, with damage from the war still visible. Source: Vogel 2006 ( click to enlarge ) Ruacana Diversion Weir The Ruacana diversion weir is some 40 km downstream from the Calueque weir in the Lower Kunene. The weir was completed in 1978 but only came into use in January 1980 when the sluice gates were closed for the first time. The main objective of the Ruacana diversion weir is: to provide a constant head of water in the river and divert water through an 8m diameter pipe for hydroelectric power generation for Namibia. Whilst the weir and inlet structures for the hydropower plant are in Angola, the power plant itself is in Namibia. The plant has a capacity of 240 MW, with three 80 MW turbines installed, and is Namibia’s main source of power generation. NamPower are planning to increase production capacity by adding a fourth turbine. The Ruacana hydropower plant is NamPower’s main source or power generation, despite the fact that Ruacana's contribution to Namibia's electrical energy demands The Ruacana hydropower plant is NamPower’s main source or power generation, despite the fact that Ruacana's contribution to Namibia's electrical energy demands varies from year to year - in 1991 Ruacana contributed 69 %, while in 1997 this had dropped to 31 % due to run of river conditions. Overview of the Ruacana Falls with electrical relay station. Source: Government of Namibia 2007 ( click to enlarge ) Schematic of the Ruacana hydroelectric scheme. Source: Government of Namibia 2007 ( click to enlarge ) Due to the war the Kunene River Scheme has yet to function in the planned integrated manner. The flow of the river has so far been poorly regulated by the Gove dam and Calueque weir, meaning power generation at Ruacana has been open to huge seasonal fluctuations, with spills during the wet season and very little generation during drought spells, as well as annual fluctuations. However, the Work Currently Underway at both Gove and Calueque will ensure that the entire Ruacana scheme finally functions as foreseen. Next: Infrastructure for Hydropower in Angola .
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