Whats New

In NRW, Water Leakage & Pressure Management

Quick Navigation to New Stuff on LeaksSuite

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As the free downloadable technical content is continually increasing, this “What’s New” webpage has been created to help both existing and new users to quickly identify and access key additions and changes to the website and other international initiatives. As from early 2016, the website content is being substantially extended to include papers and a comprehensive guidance note with multiple references on apparent losses (also known as commercial losses).

DateDescriptionLink
13 Oct
2017
NRW as % of SIV fails yet again to identify major NRW savings in Romania; possible motivations for users of this failed KPI are reviewed.NRW as % of SIV fails again
04 Oct
2017
Over 50 YouTube interviews in ASCE/EWRI Water Distribution Systems Analysis History Project include Allan Lambert and Kobus van Zyl. History Project
Allan Lambert
Kobus van Zyl
04 Oct
2017
LEAKSSuite Website use continues to grow by around 11% in 3 monthsWebstats July to Oct 2017
03 Oct
2017
Quarterly Summaries of website statistics have been moved from Blogs to the ‘About Us’ Section Webstats
03 Oct
2017
Cumulative Number of Users (Active and Returning), Page Views and Countries for a rolling 12 month period are now shown at the top of the ‘Welcome’ (Home) PageWelcome
24 Sep
2017
Realistic modelling of pressure-dependent leakage. Lambert, Fantozzi, Shepherd. CCWI2017 Post-Conference Workshop Presentation 2, 8 Sep 2017. Presentation 2017T
24 Sep
2017
Pressure: Leak Flow Rates Using FAVAD: An Improved Fast-Track Practitioner’s Approach. CCWI 2017 Computing and Control in the Water Industry, Sheffield Leak flow using fast track FAVAD
24 Sep
2017
The Secret Life of Leaks, or cheating on Toricelli. CCWI2017 Post-Conference Workshop Presentation 1Presentation 2017S, awaiting completion
24 Sep
2017
A Theory for Realistic Modelling of Leakage and Intrusion Flows through Leak Openings in Pipes. CCWI 2017 Computing and Control in the Water Industry, Sheffield Leakage and Intrusion flows theory
15 Sep
2017
Water Loss reduction USA - what's going on? 4 PPT's from Water Efficient 2017, Bath;
2017R State of the States – A Comparison of Approaches to Statewide Water Loss Programs.
2017Q The Water Loss Technical Assistance Program (TAP) The Approach & Impact of The Largest Water Audit Training and Validation Program.
2017P Self-Sustaining Validation: The Nation’s First Water Loss Audit Certification Program.
2017A The Brave New World of Apparent Water Loss: Automation & Machine Learning.
North American Water Loss Conference 2017 is at San Diego Dec 3-5
Presentation 2017R
Presentation 2017Q
Presentation 2017P
Presentation AppLoss 2017A
09 Sep
2017
To mark the 1st Newsletter of the IWA Intermittent Water Supply Specialist Group, 3 recent Presentations on IWS:
2017G Challenges in moving to 24/7 water supply in Aguas de Saltillo City, Mexico.
2017F Causes of water supply intermittency in Lusaka City in Zambia.
2017D IWS: 10 reasons why it should be avoided.
Presentation IWS 2017G
Presentation IWS 2017F
Presentation IWS 2017D

Archive for entries before August 2017

DateDescriptionLink
12 Aug
2017
An overview approach to assessing leakage performance on a Country/Region/group basis, using ILI data sets already on the website ILI Overviews by Country
08 Aug
2017
2015 ILI data set for all ten Netherlands Water Utilities derived from publicly available data sets a high standardNetherlands ILI 2015
31 Jul
2017
Introduction of UARL adds welcome International and European context to more challenging leakage targets in Ofwat PR19 consultation. Ofwat PR19 endorses UARL
20 Jul
2017
Updated version of Merks et al Presentation "NRW as % of System Input Volume just doesn’t work!" at IWA Water Efficient 2017 Conference, Bath, UK 18-20 July 2017 Presentation 2017N
19 Jul
2017
A wide ranging international review of how droughts and successful teamwork initiatives have driven the successful development of practical water loss control tools since 1994.Presentation 2017M
19 Jul
2017
With current widespread use of advanced pressure management, the simplified assumption of a fixed N1 for pressure:leak flow relationship may no longer be valid. The paper defines the relationships and equations relating to Average Zone Pressure and the N1 exponent, using the full FAVAD Concept.Paper 2017L
Presentation 2017K
11 Jul
2017
The LeaksSuite philosophy "Fulfilling a Need" and how to find what you need on the website. IWA Water Efficient, Bath, UK 18-20 July 2017.Presentation 2017J
09 Jul
2017
LEAKSSuite Website use continues to grow: summaries for April to June 2017 and new initiativesLeaksSuite to June 2017
10 Jun
2017
Updates on applying the FAVAD Concept to Pressure:Leak Flow relationships: Info on Presentations June to Sep 2017 Pressure Leak Flow Relationships
01 Jun
2017
Open Access ASCE Technical Paper: Realistic Modeling of Leakage and Intrusion Flows through Leak Openings in Pipes. J.E van Zyl, A.O. Lambert, R. Collins,ASCE Journal of Hydraulic Engineering / Vol 143 Issue 9 - Sept 2017
27 May
2017
15 Italian NRW specialists register as supporters of Professionals abandon Percentages (Pap) Initiative following 3-day Masterclass for Italian Utilities in Ravenna. Now 124 PaP supporters in 53 entities in 22 countries.PaP Supporters
Previous Workshops
24 May
2017
Pressure transients – seeing is believing. View a media clip showing effect of pressure transients on above-ground mains, and access a reference paper. ‘Out of sight, out of mind’ isn’t a rational policy option for transients. Pressure Transient Awareness
16 May
2017
Registration now open for 1-day Workshop on latest Realistic Pressure:Leakage modelling in Water Pipes using FAVAD and N1 concepts, 8 Sep 2017 following CCWI Conference 5 to 7 Sep, at University of Sheffield. Workshop Leaders Prof Kobus van Zyl and Allan Lambert. Workshop 8 Sep 2017
15 May
2017
Merks et al: Presentation ‘NRW as a % of System Input Volume just doesn’t work!’ PI 2017 Conference of the IWA
benchmarking and performance assessment group in Vienna, Austria, May 15-17 2017.
Presentation 2017C
13 Apr
2017
Jan to March 2017 Overview shows new Workshops Section, and upcoming improved use of FAVAD. Our 20k users would now fill Anfield’s Spion Kop. LeaksSuite to March 2017
23 Mar
2017
Laneuville et al: Presentation ‘Water Loss Reduction: How Low Can We Go?’ Americana Réseau Environnement, Quebec AWWA Section. Montreal, March 2017Presentation 2017B
30 Jan
2017
Innovative pressure management scheme restores continuous supply with many additional benefits in eSikhaleni, Kwa-Zulu Natal, South AfricaPresentation IWS 2017B
23 Jan
2017
Water & Waste International readers vote Allan Lambert as a Top 25 Water Leader again in 2017; our thanks to all involved in LEAKSSuiteWeblink to blog
13 Jan
2017
End of Year LEAKSSuite website overview, now 17700 Users from 177 countries. Plus news of 2 new Info-Hub Initiatives for 2017Weblink to blog
06
Jan
2017
Charalambous B and Liemberger R. Dealing with the complex Interrelation of Intermittent Supply and Water Losses. Paper and Presentation at IWA World Congress, Brisbane, Australia, October 2016Paper IWS 2016R
Presentation IWS 2016S
29 Dec
2016
Numerous references showing why many professionals have abandoned using NRW & its components as %s of System Input Volume.Why Professionals abandon %s of System Input Volume
29 Dec
2016
A list of professionals who have supported abandoning use of NRW and its components as %s of System Input Volume Supporters of Initiative ‘Professionalsabandon Percentages of SIV (PaP)’
29 Dec
2016
You can voluntarily register your support for the LeaksSuite Initiative "Professionals Abandon NRW and its Components as %s of SIV"Register your support
29 Dec
2016
New Info-Hub for FREE papers and presentations on the management of Intermittent Water Supply (IWS) & Keynote paper by B. Charalambous.IWS Info Hub
Paper IWS 2016Z
10 Dec
2016
ILIs in 2014 from 7 Flemish public water Utilities in the Aquaflanders consultation group are the latest addition to Global ILIsAquaflanders Utility ILIs
07 Dec
2016
Masterclass for Aguas de Saltillo reviews latest approaches for dealing with intermittent supply in systems with roof storage tanks.Managing NRW – Roof Storage Tanks & Intermittent Supply
05 Nov
2016
Australian ILIs: updated 2014-15 data set of ILIs for 65 Water Service Providers. Source: Bureau of Meteorology National Performance ReportAustralian ILIs
29 Oct
2016
Portuguese ILIs 2013 data set of 9 Utilities extended to 14 Utilities by addition of 2015 data for 5 more Utilities: main source iPerdasPortuguese ILIs
20 Oct
2016
Leakage Management: Key Concepts and Policy Recommendations: EU Reference document Good Practices on Leakage Management WFD CIS WD PoM (Merks, Lambert, Trow).Water Ideas Conference, Bologna, 20-21 Oct 2016.Presentation 2016Q
20 Oct
2016
Regulation in water loss management and benchmarking to achieve efficiency: an International perspective: Fantozzi & Lambert. Water Ideas Conference, Bologna Oct 2016.Presentation 2016P
17 Oct
2016
Seminal 1994 article ‘Pressure Dependent Leakage’ by John May in World Water & Environmental Engineering, with permission of WEF (USA) Article 1994M
10 Oct
2016
LEAKSSuite: A Free Resource for improved practical assessment and management of Leakage, Pressure & Apparent Losses. Seminar, Exeter UniversityPresentation 2016N
02 Oct
2016
Quarterly Leakssuite website overview July to Sep 2016 continues to show strong growth, now 15,470 users from 175 countries.LeaksSuite Data to Sep-2016
15 Sep
2016
New Guidance Notes on Apparent Losses & Water Loss Reduction Planning (77 pages) with 9 separate Appendices and numerous references by Vermersch, Carteado, Rizzo, Johnson, Arregui & LambertGuidance Notes (App Loss)
01 Sep
2016
Improving international management of leakage – the hidden water resource. Presentation by Allan Lambert to 4th British Hydrological Society International Conference, Cranfield University, 30th Aug to 1st Sep 2016.Presentation 2016L

Archive for entries before September 2016

DateDescriptionLink
24 Aug
2016
Non-Revenue Water and Errors throughout the Data Acquisition Process (Vermersch and Caerteado). Appendix 5 of 2016 Guidance Notes on Apparent Losses and Water Loss Reduction Planning Guidance Notes AppLoss 2016L Paper AppLoss 2016K
24 Aug
2016
Customer Metering Inaccuracies (Arregui F). Appendix 3 of 2016 Guidance Notes on Apparent Losses and Water Loss Reduction Planning Guidance Notes AppLoss 2016L Paper AppLoss 2016J
06 Aug
2016
A Greek language version of the free EurWB&PICalcs Water Balance and KPI software has been created for the Hellenic Water Association EurWB&PICalcs in Greek
EurWB&PICalcs
28 Jul
2016
New entry to Concepts section: What is the Night Day Factor and why is it importantLink to NDF webpage
28 Jul
2016
Power point presentation explaining concepts and practical application of Average Zone Point (AZP) and Night Day Factor (NDF) Presentation 2016J
03 Jul
2016
Quarterly Leakssuite website overview April to June 2016 shows continued strong growth, now 13,400 users from 171 countriesData to June-2016
20 Jun
2016
Call for papers "Workshop on efficient management of losses, energy and demand in water distribution systems, 21 Oct 2016, Bologna, Italy"Water Ideas
26 May
2016
The practice of tracking changes in leakage as % of Distribution Input is shown to be flawed, using England/Wales data from a recent Report.Interpreting Leakage in England & Wales
23 May
2016
A simplified practical step-by-step approach to assessing random uncertainty in water balance calculations: getting started.Paper 2016H
12 May
2016
ILIs for 6 metered Utilities in New Zealand, together with other aspects of the Water New Zealand National Performance ReviewNew Zealand ILIs
06 May
2016
Outreach (AppLoss): updated versions of two Non-Revenue Water draft papers originally written in 2010 for Apparent Loss Guidelines. NRW & Unbilled Authorised Consumption by Michel Vermersch and Fatima Carteado (2016G). NRW and Large Water Meter Calibration (2016H) by Edgar JohnsonPaper AppLoss 2016G
Paper AppLoss 2016H
15 Apr
2016
Quarterly Leakssuite website overview Jan to March 2016 shows continued strong growth, now 11160 users from 168 countriesData to March-2016
15 Apr
2016
Pressure Management MasterClass in North Wales with participants from diverse backgrounds identifies potential practical advancesPressure Management MasterClass
30 Mar
2016
Overview information on 4th Edition of American Water Works Association M36 ‘Water Audits and Loss Control’ Programs, just published with links to free water audit softwareAWWA M36 updated
08 Mar
2016
Interview for Agua & Ambiente Journal/Water & Environment Magazine (Portugal) on the EU Reference document “Good Practices on Leakage Management” and its importance for Portugal. March 2016 Edition of Água&Ambiente" (Water&Environment) Magazine, PortugalPortuguese Article 2016F
English Article 2016E
24 Feb
2016
ILIs for 2014 from DANVA for 36 Danish Utilities are the best country data set so far on Global ILIs, and show the benefits of operating systems at relatively low pressures.Danish ILIs
14 Feb
2016
Outreach (AppLoss): updated versions of two comprehensive practical draft papers originally written by Fatima Carteado and Michel Vermersch in 2010 for Apparent Losses Guidelines.
Non-Revenue Water and Revenue Collection Ratio: Review, Assessment and Recommendations (2016A)
Apparent Water Losses generated by Unauthorised Consumption: Assessment and Corrective Actions (2016B)
AppLoss 2016A
AppLoss 2016B
14 Feb
2016
Outreach (AppLoss): Flores J, Diaz I: Accurate Assessment of under metering in Madrid Water Supply. Paper presented at 5th IWA Specialist Conference on Efficient Use and Management of Urban Water (Efficient 2009), Sydney, Australia, October 2009.AppLoss 2009T
02 Feb
2016
3 Presentations @ IWA Conference ‘Water Loss 2016’, Bangalore, 31 Jan to 3rd Feb 2016.
(2016B) Fulfilling a need: ‘Free to all’ Web-based Information on NRW, leakage and pressure management
(2016C) EU Reference document Good Practices on Leakage Management
(2016D) Leakage Performance Indicators ‘Fit for Purpose‘
Presentation 2016B
Presentation 2016C
Presentation 2016D
25 Jan
2016
Water and Wastewater International readers vote Allan Lambert, founder of the ‘free to all’ LeaksSuite website, as 8th out of 25 International Water Leaders Industry Leaders
WWi’s Top 25 Leaders
22 Jan
2016
Croatian ILIs 2005 to 2014, and Croatian language versions of EU document and EurWB&PICalcs softwareCroatian ILIs
22 Jan
2016
Update of latest published ILIs from Australia Australian ILIs
22 Jan
2016
Outreach (App Loss): Paper by Dr. Lajos Hovany "Proving the Conditions for Domestic Water consumption Measurement by Water Meter" (2013)AppLoss 2013G
22 Jan
2016
Outreach (App Loss): Paper by Dr. Lajos Hovany "Error in Water Meter Measuring Due to Shorter Flow and Consumption Shorter Than the Time the Meter was Calibrated"AppLoss 2012X
08 Jan
2016
Outreach (App Loss): 8 papers and presentations by Francisco Arregui and joint authors on Water Meter accuracy, performance and management, 2005 to 2015. Key Factors affecting Meter Accuracy (2005); Quantification of Meter Errors of Domestic Users (2007); Tools for improving decision making in water meter management (2009); Calculating the optimum level of apparent losses due to water meter inaccuracies(2010); An Integrated Approach to Large Customer Water Meters Management (2012); Systematic methodology to estimate apparent losses due to water meter inaccuracies (2012); Analysis of Domestic Water Meters Field Performance (2014); Analysis of residential single jet meter accuracy degradation rate (2015)AppLoss 2005F
AppLoss 2007S
AppLoss 2009K
AppLoss 2010Q
AppLoss 2012C
AppLoss 2012R
AppLoss 2014F
AppLoss 2015D
08 Jan
2016
Outreach (App Loss): 2 papers by Marco Fantozzi and joint authors at the IWA WaterLoss 2009 Conference in Cape Town. Investigation into under-registration of customer meters in Palermo (Italy) and the effect of introducing Unmeasured Flow Reducers; Reduction of customer meters under-registration by optimal economic replacement based on meter accuracy testing programme and Unmeasured Flow Reducershttp://www.studiomarcofantozzi.it/?p=536
http://www.studiomarcofantozzi.it/?p=539
08 Jan
2016
Outreach (App Loss): Ferreol E, How to measure and reduce the water meters' park inefficiency. IWA Special Conference ‘Leakage 2005′, Halifax, Canada2005AppLoss 2005 E
08 Jan
2016
Blog: Overview of Inaugural North American Water Loss Conference, Dec 2015, Atlanta, Georgia, with links to free downloads of over 60 presentations.North America Water Loss
05 Jan
2016
Trow S. Latest Thinking on Leakage Management: Presentation at CIWEM Drinking Water Quality Update Conference, London, UK on 18th November 2014.Presentation 2015N
05 Jan
2016
Blog on LeaksSuite Website Overview of progress from 2013 to December 2015, with recent and imminent initiatives. Now over 9000 Users from 167 countries.Data to Dec-2015
09 Dec
2015
Two presentations at North American Water Loss Conference, Atlanta, Georgia, Dec 2015: Improved leakage management by European water utilities to safeguard Europe’s Water Resources (Merks/Lambert/Trow) and Benchmarking Water Loss Performance: The Death of Unaccounted Water (Jernigan/Lambert)Presentation 2015P
Presentation 2015Q
16 Nov
2015
A new Info-Hub Webpage ‘KPIs Fit for Purpose’ lists all LEAKSSuite weblinks on progress since 1999 in Leakage KPIs, for easier access by Website UsersKPIs Fit for Purpose
15 Nov
2015
Blog on LeaksSuite Website Outreach – Progress since 2013 to September 2015, and recent and imminent initiativesleakssuite.com Data to Sep-2015
22 Oct
2015
A data set of ILIs from 33 Canadian Utilities calculated by trusted sources for the period 2003 to 2014Canadian ILIs
19 Oct
2015
Anchidin et al ‘Case Study Regarding the Pre-Localisation of Water Losses within Water Distribution Networks with the Help of Noise Loggers’ IWA Bucharest, June 2015Paper 2015 M Presentation 2015N
09 Oct
2015
Research into Austrian ILI Data (OVGW) shows why ILIs less than 1 can be achieved in very small systems less than 3000 services, and ILI range for larger Austrian Utilities. Austrian ILIs
01 Oct
2015
1st Oct planned launch of free Apps postponed due to delays in approval process for all Apple Apps JO-Apps
30 Sept
2105
Info on the Pressure Management Workshop organised by Aquas de Cascais on 23 and 24 September for 7 Portuguese Utilities within the AGS and Aquapor Groups of Companies Link to Blog
16 Sep
2015
A new Info-Hub Webpage ‘Influences of Pressure’ lists all LEAKSSuite weblinks on Quantifying Pressure Management Benefits for easier access by Website Users. Influences of Pressure
04 Sept
2015
This ‘ILI in the UK Update’ blog addresses some misconceptions of ILI which were included in a Policy Statement prepared by the UK Leakage Network in September 2014 ILI in UK Update
24 July
2015
Typing error in pressure:consumption equation (3) in papers ‘Recent developments in pressure management’ at Sao Paolo (May 2010) and Ferrara (June 2010) identified and corrected. Paper 2010E
Paper 2010H
17 July
2015
Guest Blog ‘NRW Management and Misperceptions in USA’ by Ken Brothers, Steve Cavanaugh, Will Jernigan and George Kunkel.NRW Guest Blog
14 July
2015
Blog on LeaksSuite Website Outreach – Progress since 2013 and new initiatives LeaksSuite.com site data report
08 July
2015
Article by David Lloyd Owen ‘Can we optimise the way we measure leakage’ in Global Water Intelligence, June 2015 Article 2015K
08 July
2015
Article by Mathieu Laneuville on Pressure management in Quebec Province, from Vecteur Environnement, May 2015 Article 2015H
19 June
2015
Guest Blog on Update of Bulgarian NRW KPIsBulgarian NRW KPIs
Mid May -
19 June
2015
Creation of Apparent Losses Section of website with 9 initial key papersApparent losses
Outreach (App loss)
18 June
2015
Accessing the CIWEM updated Policy Position Statement (PPS) on LeakageCIWEM PPS
16 June
2015
4 Presentations @ IWA Bucharest on EU Reference document See Table
April
2015
Presentations on EU Reference documents and Zero Sum KPI at IWA Cincinnati and SMI (Smart Water Systems) Conference, London.Free Papers 2014-15
24 Feb
2015
EU Good Practices in Leakage Management, Jan 2015. Overview Presentation on EC Reference documents, CIWEM Regional meeting, 24th February, Warrington, UKEU Good Leakage Practices
17 Feb
2015
‘At a Glance’ overview leaflet added to Table in Blog on EU Good Practices on Leakage Management Reference documentEU Good Leakage Practices
or
Leaflet 2015 A
10 Feb
2015
5 Case Study Presentations added to Table in Blog on EU Good Practices on Leakage Management Reference document: EU Good Leakage Practices
25 Jan
2015
EU Good Practices on Leakage Management Jan 2015: How to access Reference documents and Overview PresentationsEU Good Leakage Practices
04 Jan
2015
Portuguese ILI data set for 2013 from iPerdas initiative (LNEC)ILIs in Portugal
18 Nov
2014
Welcome to AquaFlanders, the umbrella organization of the Flemish water companies, as a sponsor of this websiteSponsors
07 Nov
2014
What's New webpage created; Global Support and Client Testimonials webpages re-locatedGlobal Support
Client Testimonials