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

11

ICLEI / NMBM

DROUGHT / FLOODING WORKSHOP

WATER & SANITATION

B.J. Martin

25 September 2013

22

CONTENTS

1. Climate Change2. Water Supply System3. Rainfall 4. Dam Storage5. Water Consumption6. Affects of Climate Change 7. Climate Change Mitigation8. Conclusion

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

44

2. WATER SUPPLY SYSTEM

55

2. WATER SUPPLY SYSTEM cont.

77

3. RAINFALL

8

9

1010

RAINFALL

1111

4. DAM STORAGE

1212

4. DAM STORAGE cont…

1414

5. WATER CONSUMPTION

8,6 %

1515

DEMAND VERSUS YIELD

1616

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

1717

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.

1818

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.

1919

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

2020

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

2121

Thank You

“Keep it flowing in the pipe”