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Water Reconciliation Strategy Study for the Large Bulk Water Supply Systems: Greater Bloemfontein Area vi
TABLE OF CONTENTS
Page No
1. BACKGROUND ..................................................................................................... 1
1.1 SCOPE OF THE PROJECT .......................................................................................................... 1
1.2 STUDY AREA ................................................................................................................................ 1
2. CURRENT INFRASTRUCTURE ............................................................................ 3
2.1 THE GREATER BLOEMFONTEIN AREA WATER SUPPLY SYSTEM ......................................... 3
2.1.1 The Caledon – Bloemfontein Transfer ............................................................................ 3
2.1.2 The Maselspoort Scheme ............................................................................................... 3
2.1.3 The Novo Transfer Scheme ............................................................................................ 5
2.2 POTABLE WATER BULK INFRASTRUCTURE ............................................................................ 5
2.3 MAJOR WASTEWATER TREATMENT WORKS .......................................................................... 5
3. AVAILABLE SUPPLY ............................................................................................ 6
3.1 SURFACE WATER ........................................................................................................................ 6
3.1.1 Caledon River Sub-catchment ........................................................................................ 6
3.1.2 Modder River Sub-catchment ......................................................................................... 6
3.1.3 Riet River Sub-catchment ............................................................................................... 7
3.1.4 Upper Orange River ....................................................................................................... 7
3.1.5 Lesotho ........................................................................................................................ 7
3.2 GROUNDWATER .......................................................................................................................... 7
3.3 SUMMARY OF WATER RESOURCES SERVING THE GREATER
BLOEMFONTEIN AREA ................................................................................................................ 7
4. WATER REQUIREMENTS................................................................................... 10
4.1 EXISTING REQUIREMENTS ...................................................................................................... 10
4.1.1 Urban Water Requirements of the Greater Bloemfontein Area ..................................... 10
4.1.2 Breakdown of Urban Consumption ............................................................................... 12
4.1.3 Agricultural Water Requirements .................................................................................. 13
4.2 FUTURE WATER REQUIREMENT ............................................................................................. 15
4.2.1 Understanding growth in Water Requirements ............................................................. 15
4.2.2 Population Growth Rates .............................................................................................. 15
4.2.3 Economic Growth Rates ............................................................................................... 16
4.2.4 Future Water Requirement Scenarios .......................................................................... 16
4.2.5 Agricultural Water Requirements .................................................................................. 18
5. WATER BALANCE .............................................................................................. 19
5.1 THE ORANGE RIVER SYSTEM ................................................................................................. 19
5.2 THE GREATER BLOEMFONTEIN AREA ................................................................................... 20
6. ISSUES WHICH COULD IMPACT ON THE RECONCILIATION OF SUPPLY
AND REQUIREMENT .......................................................................................... 21
7. INTERVENTIONS SELECTED FOR PRELIMINARY EVALUATION ................. 22
7.1 PROCESS ................................................................................................................................... 22
7.2 OBJECTIVES OF THE PRELIMINARY SCREENING WORKSHOP ........................................... 22
7.3 SCREENING WORKSHOP STARTER DOCUMENT .................................................................. 22
Interventions Report June 2012