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NATIONAL WATER RESOURCE STRATEGY SOUTH AFRICA’S WATER SITUATION AND STRATEGIES TO BALANCE SUPPLY AND DEMAND BERG WMA

NATIONAL WATER RESOURCE STRATEGY SOUTH AFRICA’S WATER SITUATION AND STRATEGIES TO BALANCE SUPPLY AND DEMAND BERG WMA. WMA 19: Berg - Rainfall and Evaporation. WMA 19: Berg - Base Map. WMA 19: Berg - Land Use. WMA 19: Berg - Sectoral Water Requirements (2000). National. Berg WMA.

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NATIONAL WATER RESOURCE STRATEGY SOUTH AFRICA’S WATER SITUATION AND STRATEGIES TO BALANCE SUPPLY AND DEMAND BERG WMA

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  1. NATIONAL WATER RESOURCE STRATEGY SOUTH AFRICA’S WATER SITUATION AND STRATEGIES TO BALANCE SUPPLY AND DEMAND BERG WMA

  2. WMA 19: Berg - Rainfall and Evaporation

  3. WMA 19: Berg - Base Map

  4. WMA 19: Berg - Land Use

  5. WMA 19: Berg - Sectoral Water Requirements (2000)

  6. National Berg WMA Sectoral contributions to the economy (1997) 30 % 20 % Contribution 10 % 0 % Other Trade Mining Finance Transport Electricity Agriculture Community Government Construction Manufacturing

  7. WMA 19: Berg - Water Availability (2000)

  8. WMA 19: Berg - Water Reconciliation (2000)

  9. WMA 19: Berg - Population scenarios

  10. WMA 19: Berg - Water Reconciliation (future)

  11. WMA 19: BergGroundwater • About 6% of the total requirements for water in the WMA is estimated to be supplied from groundwater mainly for irrigation in the Cape Flats area and upper parts of the Berg River catchment • Largest urban use of groundwater is at Atlantis where artificial recharge of groundwater is practised • Close inter-dependence exists between groundwater and surface water in certain areas • Significant quantities of water believed to be abstractable from deep fractured rock aquifers of the Table Mountain Group geological formations

  12. WMA 19: Berg Water quality • Quality of surface water of a high standard in upstream reaches and mountainous areas • Tributary inflows to lower reaches of Berg River of high salinity - limits usability thereof • Water quality in estuary and lower tidal reaches of the river is of high salinity • Management of water quality in lower reaches of Berg River and the estuary of particular importance • Concern about potential pollution of sandy aquifers through infiltration of urban effluent • Quality of groundwater of a high standard in southern and south-eastern parts of the WMA - mineralisation problematic towards the north-west

  13. WMA 19: Berg Key issues • Necessity for need for augmentation of existing water supply - deficits already experienced in excess of what can be mitigated through water demand management • Projections of future growth in water requirements in Greater Cape Town area • beyond remaining undeveloped resource potential in WMA • will require additional transfer of water into WMA

  14. WMA 19: Berg Key issues (2) • The impacts of implementation of the Reserve on the current water balances as well as on the potential for future development in the water management area • Special attention needs to be given to management of water quality in the lower Berg River • Possible exploitation of the Table Mountain Group aquifers

  15. WMA 19: Berg Water resources under control of the Minister • Transfer of water from Breede WMA to Berg WMA • 172 million m³/a from Riviersonderend • 23 million m³/a, on average, from Palmiet River (maximum capacity of 50 million m³/a) • smaller transfers from Breede WMA(8 million m3/a)

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