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CAPE TOWN WATER RESILIENCE
On behalf of Water and Sanitation Department September 2017
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Water Reticulation System
9,300km of sewer pipeline 11,000km of water pipeline 650,000 service connections 821 staff fixing leaks daily 800+ service requests daily We live in a society where water has and is the most precious resource one could ever be privileged enough to have access too. Not only access, but access to SAFE drinking water that is AFFORDABLE to use
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Comparative Water Use from WCWSS (2014/2015)
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Water consumption in Cape Town (2016 / 17)
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Population Growth and Water Use Efficiency
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Water Allocations and Actual Demand
Proposed COCT Augmentation Schemes Accelerated Programme (Additional 15 Mm3) Allocation from Berg River Dam (84 Mm3) Fully Financed by CCT 20 % Saving Mm3 Combined allocations from Voelvlei, Wemmershoek, Theewaterskloof and Steenbras Dams plus Palmiet Transfer (320 Mm3)
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City of CT dams - 20 year volume of water stored
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WCWSS Storage Record 75% 62% 45-50% 30% 15-20%
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Ccc
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Full Domestic and Business Water Tariffs (2017/18)
Tariff Step (KL) Level 1 (10%) Level 2 (20%) Level 3 (30%) Level 4 (40%) Step 1 (0 - 6) 4.56 Step 2 ( ) 17.75 Step 3 (10.5 – 20) 20.77 22.85 24.93 25.97 Step 4 (20 – 35) 30.76 37.22 41.53 43.69 Step 5 (35 – 50) 38.00 51.30 70.29 113.99 Step 6 > 50 50.12 111.38 238.59 302.24 Commercial & industrial tariffs 18.77 21.82 25.35 27.97
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Grind it Out Ramp it Up The New Normal Scenarios developed end of May
The drought is temporary in nature, and will break. There will inevitably be some amount of rain in the winter of 2017. Ramp it Up The 2017 winter rainfall will be substantially lower than the historical record. The drought continues for at least one more year. The New Normal Previous climate models cannot be relied upon. We are experiencing the harsh impacts of climate change. Over reliance on surface water is a risk.
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“New Normal” Water Resilience Programme
The days of plentiful water supply have past. Good rainfall years should be considered anomalous as opposed to drought years We must all adapt to water scarcity. This does not mean lower living standards or a diminished economy. The old “water scarcity” must become “enough water” The current situation presents an opportunity to build a new relationship with water. We must rethink our over-reliance on surface water and seek to build a Water Sensitive City Now is the time to build resilience. It is our collective responsibility We need to formulate a new relationship with risk as climate change adds significant uncertainty. Ultimately we need to make difficult choices for our future prosperity and seek a coalition of the best minds.
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Water Resilience Portfolio
Portfolio Response Water Resilience Portfolio Disaster Management Programme Emergency Programme Tactical Programme Strategic Programme Financial Strategy Programme Technical Strategy Programme Communication Strategy Programme Household and Business Adaptation Programme
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Future Water Outlook Key considerations:
Growing regional demand and competition for water Climate change requires diversification of water sources and improved water use efficiency Unit cost of water is likely to increase as more costly alternatives to surface water schemes are implemented Opportunity provided by current water crisis must be maximized to effect “quantum leap” change to the way water is resourced and utilized in CT. Drive towards Cape Town as a Water Sensitive City that: Optimises and integrates the management of all available water resources – surface, ground, wastewater and stormwater - to improve resilience Places high value on water and strives to increase water use efficiency through water sensitive urban design
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Recommendations for Business Sector
Conduct regular water audits to understand and reduce operational and supply chain water footprints. Set water efficiency targets and gain the support of suppliers, customers and staff. Build long term resilience and plan for climate change by implementing green building and water sensitive urban design guidelines as well as considering alternate water sources (rainwater harvesting, groundwater, treated effluent, etc) Prepare for the possibility of intermittent supply in 2017 and 2018 by ensuring sufficient onsite storage and effective operation of pumping systems. User Category Required Storage (Water Bylaw – excludes fire and air conditioning systems) Industrial 8 hours process water requirement Commercial 70 liters per 100 square meter gross area Hospitals, Clinics, Old Age Homes 250 liters per bed
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Water Bylaw stipulates water storage requirements
Section 52.1 (d) – minimum storage for purposes other than fire-fighting or air conditioning, Table 1 of Schedule 3
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Water Bylaw stipulates water storage requirements
Section 52.1 (e) - minimum storage for flushing toilets/ urinals in commercial and industrial premises, Table 2 of Schedule 3
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Support City posters to download for employees & guests– GreenCape for best practices and support. City Funding GreenCape’s work on Industrial Water Re-use and Design & Innovation City’s treated effluent available to large business users for operational use (cheaper than potable water). Contact City rebate on large consumers’ investment in significant improvement on quality or zero generation of effluent. Up to 30% of capital cost. Exploring establishing a fund for large water users to invest in improved catchment management - an extension of existing pilot in Atlantis. FORTHCOMING SOON: Energy, Water and Waste Forum for business. Water resilience event with supplier exhibition 19 October. Guideline for installation of alternative water systems being developed. Star rating tool for good water management practices (business operations) being updated
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Water Forum on 19 October at CTICC
DATE : Thursday 19 October 2017 TIME : 08h30 for 09h h00 Followed by light lunch & exhibition until 17h00 VENUE : Hall 1, CTICC, Cape Town.
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Useful pages on www.capetown.gov.za
Apply for supply of treated effluent City connect action page Commercial water restrictions explained Web info page Apply to sink a borehole or wellpoint or use an alternative source of water Register a borehole or wellpoint Water and sanitation education resources
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Non-potable water options for irrigation
Groundwater – boreholes, wellpoints and springs on property. With appropriate permissions. Register with City if under 10,000 liters per day and apply for water use licence from national Water & Sanitation Dept if more Greywater – complexity, including real health risks and long-term damage to the soil. Not recommended unless used very ‘conditionally’. Guidelines being developed Rainwater and stormwater- check quality, sufficient storage Treated effluent. Contact:
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Signage at the main entrance
VIRGIN ACTIVE – ‘BEST PRACTICE’ SIGNAGE FOR WATER SAVING AT THEIR GYMS IN CAPE TOWN Signage at the main entrance
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Reminder signage as you enter the shower room
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Reminder again right at the point where you use the water to shower
Reminder again right at the point where you use the water to shower. Positive thanks for saving message.
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