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Economic Impact of Acid Mine Drainage

Economic Impact of Acid Mine Drainage . Richard Holden Trans-Caledon Tunnel Authority. Chaos Theory. “Does the Flap of a Butterfly's Wings in Brazil set off a Tornado in Texas”? Does a dam failure in the Gamtoos Valley affect water supply in Phalaborwa?. The Heart of Southern Africa.

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Economic Impact of Acid Mine Drainage

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  1. Economic Impact of Acid Mine Drainage Richard Holden Trans-Caledon Tunnel Authority

  2. Chaos Theory • “Does the Flap of a Butterfly's Wings in Brazil set off a Tornado in Texas”? • Does a dam failure in the Gamtoos Valley affect water supply in Phalaborwa?

  3. The Heart of Southern Africa

  4. Water Resource v Economic Development

  5. Mining Areas

  6. NORTH SOUTH Opencast Pit Wonderfontein Spruit #8 Shaft DECANT R24 NE Shaft 1650 Dolomite aquifer potentiometric surface 1600 Riet Spruit Elevation (m amsl) N14 1550 1550 Proposed ECL 1530 m amsl Fractured rock aquifer intersected by flooded mine workings 1500 Elevation (m amsl) 1500 Fractured rock aquifer intersected by faults 1450 1450 Dolomite aquifer (COH WHS) 4 11 12 km 3 5 9 10 6 7 8 0 1 2 Western Basin Cross Section Showing Groundwater flow Water Level Water runs under the road Krugersdorp Game Reserve Cradle of Humankind

  7. Untreated AMD

  8. Neutralisation

  9. Salt Load

  10. Impact

  11. RUSTENBURG Vaal Barrage Vaal Dam Bloemhof Dam Proposed Jana Dam Proposed Mielietuin Dam Katse Proposed Polihali Dam Mohale Vaal/Orange River System 12

  12. World Bank Study • The Impact of Drought on Sub-Saharan African Economies • 1992 – 1995 Drought in Vaal River System • 49,000 agricultural jobs • 20,000 formal sector jobs

  13. Reconciliation Scenario Polihali Dam Yield High Water Requirement Scenario with Water Conservation and Demand Management Yield reduction due to dilution wastages Short-term excess yield Yield increases due to desalination of mine water System Yield First transfer from LHWP Phase II

  14. Comparison with other Schemes

  15. Financial Impact

  16. How Valuable is Water? • How much per m3? • ± R21,000 /m3 • What is the value of water that goes into 1 m3 of Coke? • ± R34 /m3 • What is the effect of no water on the Agriculture, food and beverage industry, mines, hotels etc.?

  17. Thank you Questions … TCTA Richard Holden Business Analyst e-mail: rholden@tcta.co.za Telephone: (012) 683 1200 Website: http://www.tcta.co.za

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