DHI 2016 ANNUAL CONFERENCE

Transcription

1 DHI 2016 ANNUAL CONFERENCE Managing Drought The Umgeni Water Experience 18 April 2016 Percy Sithole Water Resources Planning

2 Population Density

3 Current Water Resources Mearns Weir Spring Grove Dam Albert Falls Dam Nagle Dam Inanda Dam Mvoti (run-of-river) Midmar Dam Hazelmere Dam EJ Smith Dam Umzinto Dam Mhlabatshane Dam Mtwalume (run-of-river)

4 Future Water Resources Lower Thukela BWSS umkhomazi Water Project Hazelmere Dam Raising Lower umkhomazi BWSS / Desalination

5 Drought Impacts and Mitigation Measures

6 North Coast System Hazelmere Dam 30% capacity

7 Hazelmere System

8 Hazelmere Storage 2014/15/16

9 Interventions - uthongathi Transfer Scheme

10 Impact of water restrictions & pumping

11 Mgeni System Storage Projection

12 Spring Grove Dam

13 Midmar Dam

14 Mgeni System Storage

15 Mgeni System Storage

16 Interventions MMTS into Midmar Dam Midmar Dam Storage Pumping stopped 01 May Storage (mcm) Nov 2014 Dec 2014 Jan 2015 Feb 2015 Mar 2015 Apr 2015 May 2015 Jun 2015 Jul 2015 Aug 2015 Sep 2015 Oct 2015 Nov 2015 Dec 2015 Jan 2016 Feb 2016 Mar 2016 Apr 2016 % Pumping resumed 08 Oct 2015 FSL Dam % (Observed) Dam %+No Pumping scenario

17 Interventions Inanda Pumping to relieve Upper Mgeni Albert Falls & Nagle Storage Total Storage (mcm) Jul 2014 Aug 2014 Sep 2014 Oct 2014 Nov 2014 Dec 2014 Jan 2015 Feb 2015 Mar 2015 Apr 2015 May 2015 Jun 2015 Jul 2015 Aug 2015 Sep 2015 Oct 2015 Nov 2015 Dec 2015 Jan 2016 Feb 2016 Mar 2016 Apr 2016 Total Storage (%) FSL Albert Falls & Nagle % (Observed) % with No Pumping from Inanda

18 Each Water Services Authority has developed a Water Saving Plan which is being implemented Media awareness campaign aimed at the general public has been running over the past few months Daily water treatment plant production figures are distributed for all stakeholders to monitor if the required water savings are being achieved

19 Mgeni System Daily Monitoring of WTP Production

20 Middle South Coast System - Umzinto Dam

21 Middle South Coast System - EJ Smith Dam

22 E J Smith Dam Effects of Mpambanyoni Pumping

23 Ixopo System Ixopo Dam Borehole-0.4 Ml/d Ixopo Dam 2.2 Ml/d MITIGATION Ml/d pumped in - Enforced releases from above farm dams - Clearing of alien plants above dam

24 Progress North Coast System Drought Joint Operating Committee (JOC) set up in Oct 2014 Department of Water & Sanitation (DWS), Department of Cooperative Governance & Traditional Affairs (CoGTA), Umgeni Water (UW), ethekwini Metro & ilembe District Municipality (DM) DWS issued directives to all affected Water Services of regarding required 30% & 40% water saving in 2015 Mgeni System Drought JOC set up in December 2015 DWS, CoGTA, UW, ethekwini Metro, umgungundlovu DM, umsunduzi Local Municipality (LM), Ugu DM & Agricultural sector DWS issued directives to all affected Water Service Authorities regarding the required 15% water saving in December 2015 Restriction Notice published in the Government Gazette in March 2016 Harry Gwala (Ixopo) System Drought JOC set up in DWS, CoGTA, UW, Harry Gwala DM, ubuhlebezwe LM DWS issued directives to all affected Water Service Authorities regarding the required 25% & 50% water saving in 2015 South Coast System (Umzinto & EJ Smith dams) Drought JOC set up in 2015 DWS, CoGTA, UW, ethekwini Metro, Ugu DM DWS issued directives to all affected Water Service Authorities regarding the required 25% water saving in June 2015 Committee still intact but system is 100%

25 Conclusions Require to maintain 40% restrictions in Hazelmere System until Lower Thukela Bulk Water Scheme is commissioned in June 2016 Require Mgeni System immediate reduction in water consumption of: 15% for Domestic /Commercial/Industrial 50% for Agriculture, the sector is currently well organised and achieving their target saving Domestic/Industrial sector not achieving their target saving Urgent need for Water Service Authorities to expedite the implementation of their respective Water Saving Plans The implementation of daily water rationing (as has been implemented for Hazelmere) has had to be enforced as the required water savings are not achieved A reassessment of the water restriction level required for the Mgeni System will be undertaken in May 2016 Require to maintain 50% restrictions in ixopo System DWS request of 25% restrictions not (officially) lifted in South Coast System, full demand is supplied at the moment

26 THANK YOU