modelling and mapping of leakage how vital this is in nrw...

Modelling and Mapping of Leakage – How Vital this is in NRW reduction Programs? Dr.Uma Umakhanthan Water Industry Director, Bentley Systems - Australia

2 | WWW.BENTLEY.COM | © 2012 Bentley Systems, Incorporated


Agenda:

Future Water Industry Challenges for Water Utility Engineers

Modelling – Decision Making Tool to Manage the Water Systems more effectively.

Benefits of Hydraulic Models

Water Loss Management Thro Integrated Modelling Approach

Case Studies From the Region


About Bentley


About Bentley

Global Business:

• Nearly 3,000 colleagues in 45 countries

• $500 million in annual revenues

20 of the Top 20 in: General Building Transportation Power Manufacturing Water Sewer/Waste

19 of the Top 20 in: Industrial Process/Petroleum Telecommunications Hazardous Waste

47 of the Top 50 Designers in International

97 of the Top 100 Pure Design Firms

Bentley is the Global Leader in:

47 out of 50 U.S. State DOTs use Bentley

Road and Rail

Bridges

Water systems

Structural analysis

Process plant operations

Generative design

3-D city GIS

Construction simulation

Energy modeling

Infrastructure asset operations

Collaboration servers for project work-sharing

Bentley Subscribers are the

ENR Top Design Firms:

http://enr.construction.com/business_management/companies/2011/0420-TopDesignFirmsGlance-1.asp

Modelling an Overview


“Bentley’s Advanced Hydraulic

Modeling Tool is like a Bike

Seat

Thai Water Utility Engineers and

Planners can’t really go far

without it in better managing

their Water Systems”


Minimize Cost Capital investment, operations and maintenance.

Maximize Benefit Hydraulic performance & system reliability.

Benefits of Hydraulic Modeling

Engineers gain commanding knowledge of their Water, Wastewater &

Stormwater infrastructure, allowing them to take informed decisions.


Hydraulic Models – AN OVERVIEW

• Model = Software + Data

• Model = Approximation of real world

• Most work involves data collection/checking

• Use the best data available–It is never going to be 100% right -

Accept that and get on with it!!

• GIGO: Garbage In = Garbage Out

• Always check results to make sure they are reasonable

• Hydraulic Model now comes with Powerful optimization engines

based on Genetic Algorithm techniques

The Key Modelling Challenges for Future


• Non Revenue Water

• New Urban Growth Cnetres: People migrating (internal) towards urban centres / Population growth

• New Water Wastewater Infrastructure Developments through ADB, USAID, World Bank loans.

• Climate change / Drought / Water Savings

• Energy Savings / Carbon Emissions

• The requirement for real time decision making and SCADA Integrations

• The integration of centralised and decentralised

The Key Future Challenges for Utility Engineers

02 Vide0 Clips/Jakarta Struggles to Provide Clean Water to All.avi


• The ability to model future scenarios attributable to climate change, population growth, source options and asset condition to determine system capacity;

• The ability to factor in and model risk;

• The ability to model multiple outputs such as capacity, quality, energy, operating costs and security;

• In short to turn the networks into intelligent networks we need advanced and easy to use and learn modelling tools such as WaterGEMS and SewerGEMS.

This leads to Key Needs for

Modelling Applications in NRW reduction Programs.


• Comprehensive reference for practitioners and researchers

• Conventional techniques

• Advanced information technology

New Book: Water Loss Reduction

Leakage information management

Leakage hydraulics and modeling

Leakage hotspot detection via model calibration

Leakage detection by transient analysis

Online monitoring and detection

Pressure management by modeling

Intermittent supply management

Pipe condition assessment

Pipe renewal plan

http://www.bentley.com/en-US/Training/Products/Resources/Books/Water+Loss+Reduction





Leak

Flow

Leakage Fast Facts

• Leakage is pressurized flow

• High pressure results in high leakage

• Reduce system pressure as one of effective way to control leakages

• Good pressure management is needed

• Detecting leaks is the key to timely repair or replace leaky pipes

• Leaks are hard to find

Hidden underground

Large water distribution systems


Strategy: A Long-term Approach with Immediate [Near-term] Benefits

Implement IWA best practices

Current Annual

Real Loss Volume

Economic

Level Real Loss

Unavoidable

Real Loss

Replacing pipes with least

impact on customers

Speed and Quality

of Repairs

Detecting and fixing leaks

Replacing/installing meters (DMAs)

Active

Leakage Control P

ress

ure

Man

agem

ent

Managing assets for maximum return

Infr

astr

uctu

re

Man

agem

ent

Source: The “4 Component” diagram promoted by IWA’s Water Losses Task

Force (Thornton and Lambert, 2005)


Criticality

Analysis

Pressure Dependent Demands

WaterGEMS/WaterCAD

Criticality

Analysis

DMA*

Management

Darwin

Calibrator

Pressure Dependent Demands

WaterGEMS/WaterCAD

Criticality

Analysis

Current Annual

Real Loss Volume

Economic

Level Real Loss

Unavoidable

Real Loss

Infr

astr

uct

ure

Man

agem

ent

Active

Leakage Control

Solution: Bentley’s Integrated Water Solution Covers the Full Range of Problems

Bentley solutions complement existing solutions

Asset Management

Bentley Water

Transient

Protection

HA

MM

ER

Pre

ssu

re

Man

agem

ent

Speed and Quality

of Repairs


Modeling Technology can Help

Set water loss target

Collect and manage assets and customer information

Assess current commercial loss

Establish DMAs

Locate leaks using detection devices

Construct hydraulic model

Calibrate model and leakage hotspots

Monitor flow/pressure

Repair leaks and rehabilitate pipes

Find metering & billing errors

Conduct pressure management

Correct metering & billing errors

Assess current leakage

Find illegal connections


Conventional Detection: Sweep-through

• Leak noise acoustic devices

– Listening stick

– Correlators

– Various acoustic loggers

– Many more…

• Step testing

• Effective for many systems

• Huge potential for improvement

18 | WWW.BENTLEY.COM


Model-based Leak Detection: Locate-Pinpoint

• Model Calibration by Darwin Calibrator – Calibrate hydraulic model using field data (flows and pressures) and/or night fire flow testing

data

– Locate leakage hotspots throughout a distribution system

• Device-based methods – Acoustic methods (sounding sticks and loggers)

– Pinpoint exact leaks around the hotspots as located

19 | WWW.BENTLEY.COM

Field personnel can focus on area(s)

detected by Darwin Calibrator

Locate leaks Pinpoint leaks


Active Leakage Control Using WaterCAD/WaterGEMS

DARWIN CALIBRATOR

• Innovative and unique approach, using Genetic Algorithm optimization technology

• Predicts the location and size of water losses (both real and apparent)

Field personnel can focus on area(s)

detected by Darwin Calibrator

IWA-award winning optimization technology


Proof: Award-Winning Technology

“ We consider the leakage-detection optimization model developed in collaboration with

Bentley to be a valuable and important tool in reducing leakage and achieving the

annual targets that UUW agreed to with the U.K.’s water-industry regulator, OFWAT. A

particular advantage of this technique is its ability to identify hard-to-find leaks.” David Turtle

Leakage and Demand Strategy Manager, United Utilities Water, U.K.

“ WaterGEMS leakage detection optimization model, used in Water Loss Workshop held in

January 28-30, 2008, in Marbella, Spain, is excellent. I am impressed with this

innovation.”

Christos Lordanou

Mechanical Engineer, Waterboard of Nicosia, Cyprus

(Bentley and United Utilities receiving IWA award for leakage-detection

optimization model developed for WaterGEMS’ Darwin Calibrator)

Visit www.bentley.com/waterloss08 for complete case studies and white papers.

“ This innovation [Darwin Calibrator] resolves

a long-standing leakage problem, provides a new tool for leakage detection and finds a

new way to use network

models efficiently.”

Mark Wheeler

Atkins Water & Environment, U.K.


Hydraulic Modeling in GIS


Criticality Analysis


• Identifies worst pipes

• Based on weighted average of aspect scores

• Highest score indicates problems

Pipe Renewal Planner


Critical Pipes

High Break

Rate

Critical /

Fire Flow


Results presentation


Recoding Field Pressures

• Leakage can happen anywhere while limited loggers can be installed

• [Efficiency] Where to place? -> Detect as much as possible leakage event

• [Cost] How many to place? -> Require as few as possible


Good or Bad? – Pressure Measurements

• Evaluate position by measuring how many leakage events it can detect – Simulate leakage events and measure pressure response

– Pressure change is large enough → Detected

• Detected – Missed - 0

• Goal: measurements cover the maximum number of likely leakage events


Unknown Valves’ Challenges

• Valve change flow and pressure – Opened, Closed or Partially Obstructed

• Cause pressure drop at high flow scenarios – Peak demand, fire fighting, and emergence operations

• Challenges – Identify which valves are closed or partially closed from large

number of them


Flows/Pressures

Time

Valve Identification Implementation

• Extend Darwin Calibrator with valve identification method

– Specify a limited number of unknown valves

– Locate most likely unknown valves and optimize the status/setting (using Minor Loss Coefficient – MLC as indicator)

Case Studies


“Brisbane Water’s implementation of

Bentley’s WaterCAD/WaterGEMS

water modeling software was an

unqualified success. The software

enabled the organisation to, in a

short space of time, transition to a

situation whereby fire-fighting

analysis is routinely carried out by

all modelors, across a wider range

of applications, with answers often

being available in minutes.”

Brisbane Water

Geospatial Water

Resource Management

Maintaining fire fighting

capacity while managing

pressure to reduce leakage


Brisbane Water - ROI Statement

“Brisbane Water’s implementation of Bentley’s WaterGEMS water modeling solution was an unqualified success. It immediately addressed the needs of two key projects and met our aim of maintaining reliable water supplies under the ongoing drought, while helping to ensure community fire safety.”

“We estimate that we will save about half a million dollars in planning and design overheads in the long term. In optimized capital works, we expect to save tens of millions of dollars”


Providing Sustainable Water Supply

Manila Water Company Inc.

Innovation in Water ,Wastewater and Stormwater Network


MWC – Antipolo City Water System ROI

• Model creation time – reduced from 2-3 months to 2-4 weeks

• Breakages – reduced from 6 breaks/mo to 0-2 breaks/mo; leakage rates reduced by 6.3 mld for savings of US $75k

• Improved pump operations – OPEX reduced by US $7k per month

• Water availability – improved from 18 to 24 hours

• Socio-economic

– connection costs US $45 compared to US $186

– Truck delivery US $3.70/m3 vs US $0.32/m3 via TPSB

– Reduction of diarrhea and cholera outbreaks


Global Water Award – Water Efficiency project of the Year


Crisis Management of Water Supply in Developing Countries

MAHARASHTRA JEEVAN PRADHIKARAN


MJP, Badlapur City 24x7 - ROI

• Non-revenue water reduced – 430 ML/yr, $75k

• Intermittency improved: – 7 wards out of 34 transformed to 24x7

– 2 wards increased to 18 hrs from 3 hrs

– 7 wards increased to 7 hrs from 3 hrs

• Water quality improved

• Revenue collection increased from 71% to 96%

• Consumer complaints reduced from 55 to 5 per day

• Reduced need to store water generated excellent customer satisfaction

.


“ The installation of surge protection apparatus such as PRVs and SAVs at

strategic locations identified from the network model (HAMMER)

decreased the incidents of water interruption due to pipe breakages from

an average of 6 breakages per month to 0-2 breakages per month. This

resulted in a decrease in

leakages of 6.3 mld.”

Christine Aubrey Nocum

Network Systems Manager

Manila Water Company, Philippines

Proof: Sustaining Society with Improved Water Supplies

Visit www.bentley.com/waterloss08 for complete case studies and white papers.

“ Transformation of intermittent system to 24x7 system (using

WaterGEMS) reduced Non Revenue Water (427 million liters water

additionally available annually).”

Dr. Sanjay Dahasahasra

Member Secretary

Maharashtra Jeevan Pradhikaran, India

Parameter From To

Revenue 91% 96%

Losses 29% 23%

Staff/1000

connections 13.73 10

Complaints /

1000 connections 55 5

Annual O&M

expense / 1000

connections

Rs. 34.55 Lakhs Rs. 29 Lakhs

LPCD 171 135 (Only for areas where UG tanks are not leaking)

Improved performance


United Utilities Water & Atkins Return on Investment

Model-based leakage detection:

• 10 m3/hr leakage from 10 DMA

• Savings of 15.4 ML/day

• 3.4% of total leakage across UUW serviced regions


“ With an integration between

WaterCAD and our GIS solution

we reduced network model

creation time in 70%.”

2007 Category: Attaining Return on Innovation

SABESP–COMPANHIA

DE SANEAMENTO BA

2008 Solution Category: Innovation in Water Resources

Usage of WaterCAD To Improve

Operation Performance of the

Water Mains System at Sao Paulo


• Advanced Modelling tools offer powerful tools for WLR

• Locate-pinpoint is more efficient that sweep-through alone

• Advanced modeling is complimentary to the detection devices

• Pressure logger placement streamline the field pressure collection

• Identifying unknown valves further improves the model-based leakage detection

• Facilitate and improve water loss management in general

• The latest advanced hydraulic modelling tools greatly help reduce the CAPEX and OPEX cost

Conclusions


WaterCAD/GEMS V8i Description

“WaterGEMS is a comprehensive and easy to use water distribution modeling solution. WaterGEMS comes equipped with everything you need in a flexible multi-platform environment.”


• Steady State Analysis

• Extended Period Simulation (EPS)

• Model Creation: – ModelBuilder

– LoadBuilder

– Trex

• Optimization – Darwin Calibrator

– Darwin Designer

– Darwin Scheduler

– Leak Detection

WaterCAD/GEMS V8i

Features


• Criticality Analysis

• Conventional & Unidirectional Flushing

• Fire Flow Analysis

• Water Quality

– Tank Mixing Analysis

– Water Age Analysis

– Constituent Concentration Analysis

– Source Tracing

• Variable Speed Pumping

• Pressure Zone Manager

• Pressure Dependent Demands

• SCADA Connect

WaterCAD/GEMS V8i : Features


What does WaterGEMS V8i do?

• Hydraulics

• Master planning

• Subdivisions design

• Fire flow analysis

• Water quality

• Source tracking

• Piped Irrigation

• Criticality/reliability

• Pump selection

• Tank sizing/location

• Operational studies

• Emergency planning

• Energy studies

• Pressure zones

• Control adjustments

• Flushing

• Leakage

• Rehabilitation

• Operator training

• SCADA linkage

Thank you! More information: www.bentley.com/waterloss

Email: [email protected]

http://www.bentley.com/waterloss

modelling and mapping of leakage how vital this is in nrw...

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