‘improving quality of life and enhancing sustainable economic development’

‘Improving Quality of Life and Enhancing Sustainable Economic Development’

SEWERAGE AND BULK WATER CAPACITY IN MSUNDUZI

ADDRESSING THE WATER CHALLENGE WITHIN UMGENI WATER’S

SUPPLY AREA

06 May 2015Investment Conference 2015


PRESENTATION CONTENT

Wastewater Infrastructure

Water Demand

Water Resource Infrastructure

Long-term plans to balance Supply and Demand


Wastewater Infrastructure


DARVILL WASTEWATER WORKS

Originally constructed in 1956

Serves the City of Pietermaritzburg

Owned and operated by Umgeni Water

Designed average dry weather flow of 65 Ml/day

Effluent mix: 90% domestic & 10% industrial

Inflow during last wet season reached 150 Ml/day!

Currently discharging approx. 60 Ml/day treated effluent into the

Msunduzi River



This WWW has a current biological treatment capacity of 65 Mℓ/day. Current average daily inflow (Oct 2007 to Oct 2014) is approximately 81 Mℓ/day which is more than the plant’s capacity.

The Darvill WWW serves the Msunduzi Municipality.



The graph also indicates the spike in flow in the summer seasons when there is ingress of stormwater into the sewer system.


DARVIL UPGRADE

This WWW is currently being upgraded to a biological treatment capacity of 100 Mℓ/day.


Water Demand


Population Distribution

Source: CoGTA 2009

Harry Gwala

Umgungundlovu

Ugu

eThekwini

iLembe

Msunduzi


Households with water access below RDP levels :

WATER SERVICE BACKLOG ERADICATION

Source: Census 2011

WSA Below RDP Above RDP Total HH % below RDP

eThekwini 70 777 885 935 956 712 7%

Msunduzi 12 709 151 284 163 993 8%

uMgungundlovu 23 894 84 780 108 674 22%

iLembe 48 533 109 159 157 692 31%

Ugu 61 213 118 231 179 444 34%

Harry Gwala 51 897 60 384 112 281 46%

TOTAL: 269 023 1 409 773 1 678 796 16%


NON REVENUE WATER

Source: DWS 2014

% Non Revenue Water in 2013/2014 vs 2018/2019

WITH and WITHOUT intervention


NON REVENUE WATER

Source: DWS 2014

• Total Non Revenue Water for 2013/14 600 Ml/day

• Total Non Revenue Water for 2018/19 WITHOUT intervention 691 Ml/day

• Total Non Revenue Water for 2018/19 WITH intervention 418 Ml/day

• Total Capital Cost of Intervention R946 million

• Total Operating Cost of Intervention R286 million

• Responsibility for implementation: Water Service Authorities

• Support provided by DWS


Water Resource Infrastructure


Mearns Weir

Spring Grove Dam

Nagle Dam

Inanda Dam

Hazelmere DamMidmar Dam

Albert Falls Dam

Mhlabatshane Dam

Umzinto Dam

EJ Smith Dam

CURRENT WATER RESOURCES

Mtwalume (run-of-river)

Mvoti (run-of-river)

Resource River

Stochastic Yield (Ml/day)

Demand (Ml/day)

1:50 1:100

Mgeni System (including MMTS-2B) uMngeni & Mooi 1118 1081 1130

Mvoti (run-of-river) uMvoti 9 Not Available 18

Hazelmere Dam uMdloti 55 51 55

Nungwane Dam Nungwane 10 9 10

E.J. Smith Dam Mzimayi 5 3 4

Umzinto Dam uMuziwezinto 9 6 12

Mtwalume (run-of-river) uMtwalume 5 3 10

Mhlabatshane Dam Mhlabatshane 5 4 0.5

CURRENT WATER RESOURCE AVAILABILITY


Long Terms plans to balance Supply and Demand


WATER RESOURCE DEVELOPMENT

Mgeni Water Balance

Source: Department of Water & Sanitation, June 2014

SHORTFALL


Resource RiverCapacity

(million m3)Yield

(Ml/day)1:100

uMkhomazi Water Project Phase 1 (Smithfield Dam) uMkhomazi 226 602

uMkhomazi Water Project Phase 2 (Impendle Dam) uMkhomazi 270 1227

East Coast Desalination Plant – North -- -- 150

EWS Reuse Plants (Northern & KwaMashu) -- -- 110

PROPOSED WATER RESOURCE AUGMENTATION


PROPOSED WATER RESOURCE DEVELOPMENTS

uMkhomazi Water Project


PROJECT CAPITAL COSTS

ProjectCapacity (Ml/day)

Capital Cost(R)

Responsibility

uMkhomazi Water Project Phase 1 (Smithfield Dam) 602 17 billion DWS Raw Water (R13.1 billion)

UW Potable (R3.7 billion)

East Coast Desalination Plant – North

150 3.5 billion UW

Reuse Plants (Northern & KwaMashu)

110 2.5 billion eThekwini Metro


DEVELOPMENTAL BULK WATER SUPPLY INFRASTRUCTURE

uMshwathi BWSS

Greater Mpofana BWSS

Maphumulo BWSS

Richmond Pipeline

Greater Eston BWSS

Mhlabatshane BWSS

Southern Ndwedwe

Mzimkhulu BWSS

Impendle BWSS


SUMMARY

• Large augmentation schemes are necessary to sustain the projected demand over the long term

• It is primarily the responsibility of DWS and Umgeni Water to implement these schemes

• Total Municipal Non-Revenue Water in Umgeni Water’s supply area is currently 43% Savings in Non Revenue Water could defer implementation of large augmentation schemes

• Building large capital schemes are major undertakings that require significant lead times and funds to implement

• There will be a direct impact on the water tariff to consumers either via the CUC or UW tariff


Thank You

‘improving quality of life and enhancing sustainable economic development’

Documents

water challenge

water access

bulk water capacity

plants capacity

darvill www

umgeni waters supply

current average daily

cost of interventionr286