1. 11 ICLEI / NMBM DROUGHT / FLOODING WORKSHOP WATER & SANITATION B.J. Martin 25 September 2013

2. 22 CONTENTS 1.Climate Change 2.Water Supply System 3.Rainfall 4.Dam Storage 5.Water Consumption 6.Affects of Climate Change 7.Climate Change Mitigation 8.Conclusion

3. 33 When did climate change start? Fact: 1.NMBM has a drought every 4 years over at least the last 20 yrs! 2.Every drought is broken by a flood or heavy rainfall. 3.Any persistent rain appears to be causing flooding! 1. CLIMATE CHANGE

4. 44 2. WATER SUPPLY SYSTEM

5. 55 2. WATER SUPPLY SYSTEM cont.

7. 77 3. RAINFALL

8. 8

9. 9

10. 10 RAINFALL

11. 11 4.DAM STORAGE

12. 12 4.DAM STORAGE cont…

14. 14 5. WATER CONSUMPTION 8,6 %

15. 15 DEMAND VERSUS YIELD

16. 16 6. AFFECTS OF CLIMATE CHANGE  Drought / flood cycles occurs regularly.  Drought / flood future: No rain periods will be more prolonged! Rainfall period shorter & more intense! Will our water sources be sufficient? Affects of El Nino & La Nino!  Urbanisation creates greater impact on same water sources.  Housing Programme (80 000 units).  Economic growth

17. 17 7. CLIMATE CHANGE MITIGATION  Water Master Plan: NCLLS: water from different catchment (R770M) Recycling of wastewater (R1,5 Billion)  Industrial use  Indirect potable use WC/WDM (R57M pa)  NRW – leak detection etc.  Water Saving Awareness Campaign.  WC/WDM must be an ongoing programme. Groundwater (R150) Desalination (R1 Billion) New infrastructure to support development.

18. 18 7. CLIMATE CHANGE MITIGATION cont…  Sanitation Master Plan: Upgrading of 6 wastewater treatment works (R1.6 Billion):  Energy efficiency  Energy abstraction Rehabilitation of reticulation network:  Reduce ingress of stormwater  New infrastructure to support development Rehabilitation of pump stations.

19. 19 7. CLIMATE CHANGE MITIGATION cont…  Design intervention: Energy Efficiency:  Operational Efficiency.  Equipment efficiency. Water & Wastewater Treatment Process optimisation.  Water Services By Law:  House designs: Rain water harvesting  Township layout designs: Strom water mitigation

20. 20 8. CONCLUSIONS  Climate change affects:  Water availability  Future use of water  WC/WDM as a daily practice  Reuse of water  Water & Sanitation tariffs  Efficient use of electricity  Domestic & industrial consumption of services  Town planning

21. 21 Thank You “Keep it flowing in the pipe”