ETHEKWINI WATER AND SANITATION

MILE NRW PRESENTATION 2014

JULY 2014

Contents

Quick EWS Stats Data from other Metros (MBI) EWS Status Quo Challenges Strategic Objectives IWA Best Practice Benefits of Monitoring Summary

• 3,6 million people

• 646 000 properties

• Supply 887 Ml/day of water from 9 Treatment Works

• Treat 500 Ml/d of Waste Water

• 263 Water Reservoirs

• 27 Waste Water Treatment Works

• 7 000 km of sewer mains

• 12 000km of water mains

• 480 000 water connections

• Combined annual expenditure of R6.1bn (2014/15)

• Municipal budget R34bn (2014/15)

eThekwini Municipality Quick Statistics

NRW Data from other utilities (June 2013)

System/TownNumber of

Connections

NRW by

VolumeILI

SIV

(kl/day)

eThekwini 477 849 37,3% 7,4 881 082

Msunduzi 79 032 46,6% 6,2 177 206

Ugu 47 210 30,8% 4,6 105 810

iLembe 32 437 62,3% 5,7 62 330

uMkhanyakude 47 432 81,0% 5,0 46 354

City of uMhlathuze 41 243 31,7% 6,9 110 037

South African Average 36,8%

African Average 39,0%

eThekwini Sales and Purchases

150000

200000

250000

300000

350000

400000

450000

500000

550000

600000

12000000

14000000

16000000

18000000

20000000

22000000

24000000

26000000

28000000

30000000

32000000

May-04 Apr-05 Mar-06 Feb-07 Jan-08 Dec-08 Nov-09 Oct-10 Sep-11 Aug-12 Jul-13 Jun-14

Nu

mb

er

of

Co

nn

ect

ion

s

Mo

nth

ly V

olu

me

s (k

l)

eThekwini Water and SanitationMonthly Volumes and Connections May 2004 to June 2014

eThekwini Water Sales Total SIV - Monthly

Total number of connections 12 per. Mov. Avg. (eThekwini Water Sales)

12 per. Mov. Avg. (Total SIV - Monthly)

Water Exported Billed Water

m3/day Exported

± x % Billed m3/day

Own Authorised ± x % Revenue

Sources Consumption Billed Metered Water

m3/day m3/day Consumption m3/day

± x % ± x % m3/day ± x %

Authorised ± x %

Consumption Billed Unmetered

m3/day Consumption

± x % m3/day

± x %

Unbilled Metered

Consumption

Unbilled Authorised m3/day

System Water Consumption ± x %

Input Supplied m3/day Unbilled Unmetered

m3/day m3/day ± x % Consumption

± x % ± x % m3/day

Imported ± x % Non-revenue

Water Unauthorised Water

m3/day Apparent Consumption m3/day

± x % Losses m3/day ± x %

Water m3/day Metering

Losses ± x % Inaccuracies

m3/day m3/day

± x % Mains Leaks

Real m3/day

Losses Reservoir Overflows

m3/day

m3/day Service connection

± x % Leaks

m3/day

IWA Water Balance

Challenges

• Tampering, vandalism and theft is a growing concern as infrastructure is damaged and looted

• Age of Infrastructure • Loss of Institutional Knowledge • Illegal and Unmetered connections • Budget • Social and Political Will

Umgeni River Bridge – The Before Picture

Umgeni River Bridge – Tuesday 10 June 2014

NRW Strategic Plan Objectives THE HISTORY

NRW by volume for 2008/2009 – 38.9% (ILI 8.8) NRW by volume for 2009/2010 – 37.5% (ILI 8.4) NRW by Volume for 2010/2011 – 33.2% (ILI 6.8) NRW by Volume for 2011/2012 – 35.4% (ILI 7.2) NRW by Volume for 2012/2013 – 37.3% (ILI 7.4) NRW by Volume for 2013/2014 – 39.8% (ILI 8.2)

Year

2012/13 2013/14 2014/15 2015/16 2016/17 2017/18 2018/19

Connections 477849 480833 497521 513934 530894 548387 570161

System Input Volume (kl/day) 881082 887547 897864 908532 919559 930952 942720

Billed Metered Consumption

(kl/day) 552407 577000 602000 627000 653000 680000 707000

NRW % 37,3% 35,0% 33,0% 31,0% 29,0% 27,0% 25,0%

THE TARGETS…

NRW Strategic Plan Objectives THE TARGETS

400000

500000

600000

700000

800000

900000

1000000

1100000

1200000

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Eq

uiv

ale

nt

Ave

rage

Dai

ly D

em

and

(kl

/day

)

EWS NRW 12-Year ProjectionsWith and Without NRW Reduction Intervention

SIV - No Intervention BMC - No Intervention SIV - With Intervention BMC - With Intervention SIV - Ideal Funding

Phase 1a “System Assessment” • System knowledge • Identify problems • Quantify problems

• Identify cost-effective intervention

• Prioritize intervention

Phase 1b “System Optimisation”

• Maximize Operational Efficiency • Maximize Financial Efficiency

Minimize Losses Real Loss Control:

• Review of Service Supply

Standards • Infrastructure Improvements

• Optimal Zoning • Pressure Management

(fixed outlet optimisation) • Leak Detection and Repair

Apparent Loss Control:

• Meter Testing & Calibration

• Illegal Connections

Maximize Billed Consumption:

• Database population

accuracy • All occupied properties

have connections • Illegal connections • Customer category

• Cost recovery

“80/20”

Phase 2 “Future Intervention” • Real Loss Reduction

• Apparent Loss Reduction

Phase 3 “Sustainability”

• Preventative Maintenance • Active leak detection

• Water Balances • Reporting

Sewer Tariff impact

200000

210000

220000

230000

240000

250000

260000

Jul-

08

Sep

-08

No

v-0

8

Jan

-09

Mar

-09

May

-09

Jul-

09

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-09

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v-0

9

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-10

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v-1

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-11

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v-1

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-12

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-12

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v-1

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-13

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-13

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v-1

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Jan

-14

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-14

Ave

rage

Dai

ly C

on

sum

pti

on

(kl

/day

)

eThekwini Water and SanitationAverage Daily ICI Consumption

July 2008 to June 2014

Total Non-Domestic

12 per. Mov. Avg. (Total Non-Domestic)

July 2010 - Sewer User charge intoduced

25 Ml/day sales decrease

IWA Best Practice to reduce Apparent / Commercial Losses

Current Annual Volume of Apparent

Losses

Economic Level of Apparent Losses

Unavoidable Annual

Apparent Losses

Policy and Enforcement

Water Accounting

ControlsD

ata Han

dlin

g C

on

trols

Cu

stom

er

Mete

r M

anage

me

nt

• Checking 187 Metro Housing projects for houses without connections

• Change out programme for ICI meters (19817) • Metering of all sprinkler and fire connections • Metering of all water into informal settlements • Pilot programme to meter houses in “blue” areas • Ensure Top 200 meters < 5 years old • Change out programme for domestic meters

older than 20 years (25 000 pa) • Repeated checking of 12000 properties where

connections were previously removed • Amnesty Programme commenced in 2010 and

prosecutions now taking place to tackle illegal connections

• 75 Custody Transfer Points upgrade and monitoring– Bulk water purchase from Umgeni Water. Top 12 sites account for 99% of volume purchased – R4m / day

Apparent / Commercial Losses

Current Annual Volume of Apparent

Losses

Economic Level of Apparent Losses

Unavoidable Annual

Apparent Losses

Policy and Enforcement

Water Accounting

Controls

Data H

and

ling

Co

ntro

ls

Cu

stom

er

Mete

r M

anage

me

nt

IWA Best Practice to Reduce Real Losses

Current Annual Volume of Real

Losses

Economic Level of Real Losses

Unavoidable Annual Real

Losses

Speed and Quality of

Repairs

Active Leakage Control

Pip

elin

e M

aterials

Man

agem

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t

Pre

ssure

M

anage

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SIV Reduction – Real Losses Rezoning to new pressure standard

Advanced pressure management

Active PRV Maintenance

GSM based failure detection devices on

pressure reducing valves (100)

Advanced active leak detection on contract

Improve speed and quality of repairs.

61 people recently employed for a 12 month project for leak detection

Prevent reservoir overflows and improve reservoir integrity.

Current Annual Volume of Real

Losses

Economic Level of Real Losses

Unavoidable Annual Real

Losses

Speed and Quality of

Repairs

Active Leakage Control

Pip

elin

e M

aterials

Man

agem

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t

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ssure

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DV3022 Representative Results from PRV Optimisation

Before Profile After Profile D/S Before D/S After

Reduction in Qadd = 494m3orApproximately R49 285 per month

Daily Volume Before: 2163.88 m3

Daily Volume After: 1669.52 m3

Pressure Management Example

Leak Detection Example

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/29Fl

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rate

(kl/

hr)

Logging Period (05/01/2010 - 04/08/2010)

Umlazi 1 Real Loss Reduction

Flow Profile Monitoring

Theoretical Average Zone Pressure : 57m Theoretical Average Zone : 56m

5 PRV Settings Optimised

FEB/MARCH/APR/MAY = 1425 leaks found & repaired

FEB/MARCH/APR/MAY/JUNE = 1740 leaks found & repaired

FEB/MARCH/APR/MAYJUNE/JULY = 2007 leaks found & repaired

631.48kl/day 470.65kl/day 327.83kl/day 509.33kl/day 334.56kl/da

FEB/MARCH/APR/MAY/JUNE/JULY/AUG = 2440 leaks found & repaired

50mm 117 breaks/100KM

75mm 72 breaks/100KM

100mm 58 breaks/100KM

150mm 34 breaks/100KM

200mm 17 breaks/100KM

250mm 16 breaks/100KM

Whole system distribution main BF

Burst frequency per diameter

Statistics 2006

to 2010

Main

leaks

Service

Leaks UARL UARL BFI BFI

Year 100Km Per 1000 Mains/100

Services

/1000 Mains Services

2006 80 56 13 3 6,1 18,7

2007 89 52 13 3 6,8 17,4

2008 94 54 13 3 7,2 18,0

2009 96 61 13 3 7,4 20,4

2010 99 58 13 3 7,6 19,5

Average 91,7 56,4 13,0 3,0 7,1 18,8

Burst Frequency Analysis

• Pressure was increased to the CBD numerous pipe bursts resulted

Northern Aqueduct Failure

Durban CBD – Data and Lessons

FLOW DATA

Normal daily flow 28,7 Ml/day

Peak increased flow 10 Ml/day

Time to find and repair all leaks 9 days

Total water lost 52,3 Ml

Approximate cost of water lost R261 585

LESSONS LEARNED

The value of a monitoring and alarm system

The aging water mains are fragile and very susceptible to pressure increases. Fortunately, the reverse is also true.

Team Work makes the Dream Work

New approaches to the risks associated with vandalism/theft on strategic assets need to be found and implemented

NRW Capital Budgets

Project

Number 2014/15 2015/16 2016/17

Water loss X3289 R 65 000 000 R 55 000 000 R 65 000 000

Reservoir and district meters X5189 R 4 500 000 R 5 000 000 R 5 000 000

Prv Installation X5906 R 40 000 000 R 40 000 000 R 45 000 000

Advanced Control on Prv's X6216 R 4 500 000 R 4 500 000 R 4 500 000

Custody Transfer Meter Upgrade X6217 R 900 000 R 1 000 000 R 1 000 000

Domestic meters - Installation X4628 R 15 000 000 R 9 000 000 R 15 000 000

Blue Area Project (Flow limiter

upgrades) X6302 R 15 000 000 R 15 000 000 R 25 000 000

Bulk sales meters X4254 R 5 000 000 R 5 000 000 R 31 700 000

Total R 149 900 000 R 134 500 000 R 192 200 000

Water Meters (Material) R 9 000 000 R 10 000 000 R 10 000 000

Replacement of Water Pipes X4889 R 30 000 000 R 30 000 000 R 30 000 000

Summary The EWS programme has suffered a

number of setbacks of the last 3 years – you cannot slow down!

NRW is a complex challenge for us and all utilities

Unless improvement to social behavior is obtained targets will not be reached

NRW must be tackled on many fronts

Increased capex and opex is required for interventions

Monitoring the system has great benefit

Departments must not operate in “silos” and be mindful of impact of interventions

Thank you