Network hydraulic modelers and digital-twin builders calibrating distribution and sewer models for optimization.

    Find a Hydraulic Modeling Provider

    Matched providers: 8

    Top countries: United Kingdom, United States

    Popular technologies: AI-driven scenario simulation, Biological nutrient removal

    Water Network Hydraulic Modelling: Calibration Standards, Model Types, and Regulatory Requirements

    Hydraulic models of water distribution and wastewater networks are built in EPANET (open-source, US EPA), InfoWorks WS Pro (Autodesk), WaterGEMS (Bentley), or SewerGEMS using the governing equations: Hazen-Williams or Darcy-Weisbach for pipe friction, energy conservation at junctions, and mass balance. Model build includes pipe network (length, diameter, material, C-factor or roughness), demand allocation by zone (domestic, commercial, industrial) using DMA metering data, boundary conditions (reservoir levels, pump curves), and valve/control logic. Skeletonisation retains pipes above a threshold diameter (typically 100 mm for distribution, all mains for transmission) and aggregates smaller pipes as demand loads.

    Model calibration (WRc Hydraulic Calibration Standard, Mott MacDonald guidance, or AWWA M32) requires pressure residuals within 2 m and flow residuals within 5 percent for 85 percent of data points during a calibration trial. Calibration trials use SCADA pressure loggers (minimum one per DMA, target 3 to 5), flow data from district meter area (DMA) meters, and fire flow tests (controlled step tests). Demand multipliers (peaking factors) are calibrated against metered consumption data: typical domestic peaking factor 1.8 to 2.5 (peak hour to average daily). Chlorine decay modelling (bulk and wall decay) is an extension capability required for water quality modelling under US EPA Surface Water Treatment Rule.

    Hydraulic models are used for: leakage management (night flow analysis, pressure management zone design), capital investment planning (pipe replacement prioritisation, new source integration), real-time operational support (cloud-SCADA integration, digital twin), and regulatory reporting (Ofwat in England and Wales, EPA in US). Steady-state models answer pressure zone and capacity questions; extended period simulation (EPS) is required for water quality, storage tank cycling (target 80 percent daily turnover), and pump scheduling optimisation. Model build cost for a medium utility: $100,000 to $500,000; annual model maintenance (update for network changes, re-calibration): $20,000 to $80,000.

    Frequently Asked Questions

    What is a hydraulic model used for in water supply?

    Hydraulic models are used for: (1) Capital planning - identifying pipe capacity constraints, sizing new mains for development connections, and prioritising pipe replacement based on hydraulic underperformance and age; (2) Pressure management - designing pressure reducing valve (PRV) settings and locations to minimise background leakage (leakage is pressure-dependent per the fixed-and-variable-area discharge FAVAD equation); (3) Water quality - modelling chlorine decay and detention time to identify low-residual zones and disinfection by-product formation potential; (4) Emergency planning - assessing supply resilience under pipe burst, source failure, or demand surge scenarios; (5) Real-time operations - digital twin integration with SCADA for operator decision support and anomaly detection.

    How do you calibrate a water network hydraulic model?

    Calibration follows a structured process: (1) Collect data: pressure logger readings (minimum 7 days continuous at 15-minute intervals from 3 to 5 points per district meter area), DMA meter flow records, pump station telemetry, and reservoir levels; (2) Run model in EPS mode with measured boundary conditions; (3) Identify discrepancies: pressure errors above 2 m at 15 percent or more of logger locations indicate poor calibration; (4) Adjust model parameters: demand multipliers (most sensitive), pipe roughness (C-factor or roughness height), and model topology (missing connections, incorrectly coded valves); (5) Validate against an independent dataset not used in calibration. WRc Good Practice Guide specifies that calibration trials should include at least one artificial loading event (fire flow test or pressure step test) to perturb the network from normal operating state.

    What software is used for hydraulic modelling?

    The dominant commercial platforms are: InfoWorks WS Pro (Autodesk, formerly Innovyze) - most widely used in UK water companies (90 percent of Ofwat-regulated companies); WaterGEMS/SewerGEMS (Bentley) - widely used in US and international markets, integrates with AutoCAD and GIS; InfoWorks ICM - integrated catchment modelling combining hydraulic and hydrological models for real-time flood and drainage systems. EPANET 2.2 is the free, open-source US EPA platform for research, smaller utilities, and developing markets. SWMM (Storm Water Management Model) is the equivalent open-source tool for sewer and stormwater systems. GIS integration (ArcGIS, QGIS) is standard for model build and results presentation. Real-time digital twin platforms (IBM, Idrica, Xylem) layer AI analytics over these base hydraulic engines.

    What data is needed to build a hydraulic model?

    Essential inputs: (1) Network data - pipe asset register (length, diameter, material, year of installation) from GIS, minimum 90 percent completeness required before modelling; (2) Demand data - consumption by meter, billing zone, or land use category, with peaking factors from SCADA flow data; (3) Operational data - pump curves (H-Q characteristic from manufacturer or field test), reservoir dimensions and top/bottom water levels, PRV settings, valve states; (4) Boundary conditions - source flows, reservoir levels, interconnect meter readings. Data quality issues causing poor calibration: missing pipes, incorrect diameters from historical records, unrecorded illegal connections, and meter inaccuracies. Typical model build time for a 5,000-pipe network: 3 to 6 months including data acquisition, GIS processing, demand allocation, and initial calibration.

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    Hydraulic Modeling Companies

    Network hydraulic modelers and digital-twin builders calibrating distribution and sewer models for optimization.

    8 providers

    This page is a good fit if you need:

    • AI-driven scenario simulation or Biological nutrient removal capabilities
    • Suppliers with designers sector experience
    • Providers operating in United Kingdom or United States
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    Find a Hydraulic Modeling Provider

    Showing 1-8 of 8

    8 results from 8 matched providers

    Qatium logo

    Qatium

    Spain
    AI-driven scenario simulation · Digital network replica · Hydraulic modeling and analysis +2 more
    Europe

    Qatium, headquartered in Valencia, Spain, is an AI-powered digital water management platform for utilities. It builds a digital replica of the distribution network to simulate scenarios, optimize pressure, minimize non-revenue water, and detect leaks. The ISO 27001-certified platform integrates IoT sensors and hydraulic modeling, and offers an AI Build Studio and marketplace for custom apps, helping utilities improve resilience and efficiency.

    Digital water network management
    Leak detection and non-revenue water reduction
    Network resilience planning
    +2 more
    AG

    Antea Group

    United States
    Water risk assessment frameworks · Water footprinting methodologies · CDP disclosure and reporting tools +2 more
    North America

    Antea Group is an international environment, health, safety, and sustainability consulting firm. Its US operation, Antea Group USA, is headquartered in St. Paul, Minnesota, United States, and works with many of the world's most sustainable companies to address ESG and business challenges. The firm's services span environmental remediation, regulatory compliance, worker safety, merger and acquisition support, and sustainability strategy. Its dedicated water stewardship team specializes in water strategy and program advisory, water risk assessments, water efficiency and innovation, and water footprinting. As a CDP accredited consultancy provider, Antea Group also delivers CDP disclosure and corporate reporting services covering the Climate Change, Water Security, and Forests questionnaires. Through sister companies in Belgium, Brazil, France, India, the Netherlands, Poland, Spain, and the United Kingdom, the group draws on more than 3,200 employees across over 75 offices worldwide.

    Water stewardship strategy and program advisory
    Water risk assessments and feasibility studies
    ESG and corporate sustainability reporting (CDP disclosure)
    +2 more
    W

    WSP

    Canada
    Digital twins for water systems · Smart sensors and real-time monitoring platforms · Predictive analytics +2 more
    North America

    WSP is a global engineering and professional services consultancy headquartered in Montreal, Canada, serving governments, municipalities, utilities, and industrial clients across the planning, design, delivery, and maintenance of water infrastructure. In the water sector, WSP supports collection and conveyance systems for water and wastewater, condition assessments, risk-based planning, and upgrade strategies that extend asset life and improve system performance. The firm develops digital water solutions using smart sensors, real-time monitoring, predictive analytics, and digital twins that combine engineering models with operational data. WSP combines global technical depth with local insight to deliver integrated water management, hydraulic modeling, infrastructure renewal, and sustainability strategy.

    Water and wastewater infrastructure planning and design
    Water asset management and condition assessment
    Digital water solutions and real-time monitoring
    +2 more
    CE

    Carollo Engineers

    United States
    Conventional treatment process design · Membrane treatment systems · UV and ozone disinfection +3 more
    North America

    Carollo Engineers is a US environmental engineering firm specializing exclusively in water and wastewater services. Founded in 1933, the company provides planning, design, construction management, and operations support for municipal water utilities and industrial clients across North America.

    Water and wastewater facility planning
    Design and construction management
    Operations and asset management consulting
    +3 more
    Cadman Cranes Ltd logo

    Cadman Cranes Ltd

    United Kingdom

    Cadman Cranes is a leading provider of lifting solutions in the UK with over 50 years’ experience and a reputation for quality, reliability and safety. At the very forefront of sustainability within the industry, Cadman Cranes offer responsible and collaborative turn-key solutions across all industries. From depots in Colchester and Brentwood, Cadman is ideally positioned to cover the East of England and beyond, living and breathing its mission to provide safe lifting solutions to industry and communities in a collaborate, considerate and sustainable way. Cadman has always placed great importance on delivering so much more than just crane hire. Its values are focussed on the success of its clients, its people and its community, and it takes great pride in going the extra mile on every job, no matter how big or small. Cadman Cranes add value to your hard work and offer a full-service lifting solution that goes far beyond just crane hire. It doesn’t just look for customers, it looks for partnerships based on trust, quality and safety. Services include: Contract lift services: Our complete package service is ideal for those who require a fully managed lifting solution, removing your risk and liability, and ensuring that we deal with all of the ‘heavy lifting’. Crane hire services: Cadman Cranes is the leading crane rental company in the East of England, providing crane hire across London, Essex, East Anglia, and all over the UK. With cranes available 24/7, 365 days a year, we are well positioned to keep your operations moving. Tank clearance, dredging, and grab solutions: Cadman Cranes offers innovative tank clearance solutions with our custom-designed grab attachment. The remote-controlled grab, mounted to the hooks of our mobile cranes, can reach up to 60 meters and handle a variety of materials, including sewage waste, sludge, grit, mud, and sand. This service is ideal for wastewater treatment plants, sewage facilities, digester tanks, aeration tanks, ports, and any industrial sites that require regular tank cleaning, maintenance, or dredging. Specialist lifting equipment for utility installation projects: Utilising our range of specialist lifting equipment, we have assisted on some of the most complex utility installation projects throughout the East of England, solving problems currently unimaginable by other mobile crane hire companies. Our innovative Compact Crawler Cranes, in combination with our remote-controlled telescopic hydraulic grab, have proved invaluable in providing the highest level of service and crane hire to the utilities sector. If you would like to work with Cadman Cranes or are looking to add a safe and considerate crane hire solution to your list of approved suppliers, Cadman would love to hear from you.

    Asset Maintenance & Rehabilitation
    Waterco logo

    Waterco

    United Kingdom

    Waterco are engineering and environmental consultants providing design and consultancy services relating to water, drainage and flood risk. We have expertise in engineering and environmental disciplines and are supplemented by a network of specialist independent consultants with extensive experience in major development projects throughout the UK. Our focus is on achieving the optimum solution for our clients, meeting their objectives and adding value to their projects. We have gained a reputation for a friendly, professional and flexible approach since our establishment in 1990. Our Services Water industry infrastructure and non-infrastructure projects Pipelines & Sewerage Water & Wastewater Treatment & Systems Pumping Stations Contingency Planning Security Assessments Asset Management Surge Analysis Hydraulic Modelling Flood Risk Assessment Breach Analysis Coastal & Shoreline Analysis Surface Water Management Sustainable Drainage Systems Natural Flood Management/Catchment Approaches Clients and Partners Our clients and partners include water companies, consultants and contractors. Incorporating their experience and knowledge, we investigate and develop practical designs, to help deliver cost-effective solutions. Geographic Coverage We undertake projects all across the UK, with many of our reporting services being desk-based, travelling to site visits and meetings as required. We have also been involved in international projects such as a major development in Lekki, Nigeria. Accreditations We currently have an ISO 9001 : 2015 accredited Quality Management System; have a BS8555 : 2003 certified Environmental Management System; have design approval in the Water Industry Registration Scheme (WIRS); have maintained Investors in People recognition since 2011 and operate an ICE approved training scheme.

    Designers
    Salix River and Wetland Services logo

    Salix River and Wetland Services

    United Kingdom

    Salix River & Wetland Services are bioengineering technical specialists, involved in the supply, contract and design elements of river, wetland and coastal projects. Salix has extensive experience working within all river types across the UK, providing innovative vegetated, sustainable solutions for soil erosion and wetland creation. SUPPLY Our in-house product range specifically developed for erosion control and habitat creation includes Coir Rolls, Coir Pallets, Rock Rolls, Rock Mattresses, Rock Bags and the world’s highest performing range of Composite Turf Reinforcement Mats – VMax C350 & C500. We also provide hydraulically applied solutions such as TerrAffix. We have the largest native wildflower and wetland plant nursery in the UK. Salix are the only company to manufacture coir rolls and pallets within the UK, providing a massive reduction in carbon. Salix rock products allow natural sediment accretion and vegetation establishment, unlike harder solutions such as rock armour or gabions. CONTRACTING Salix’s contracting division undertake works for local authorities, public bodies, utility companies, main contractors & private clients, having been involved in a diverse range of projects across the UK. Salix has unrivalled specialist equipment for fluvial environment, including a Mackenzie ‘Muck’ Spider excavator. The Spider has four independent legs, with the ability to access logistically challenging of sites. Salix also has long reach excavators, floating pontoons, hydroseeders and truxor available for a diverse range of specialist fluvial and intertidal activities.

    River & Coastal Flood Protection
    Contractors
    Mott MacDonald logo

    Mott MacDonald

    United Kingdom

    We are proud of being a world-class independent management, engineering and development consultancy. Being independent, wholly owned by our people, puts us in charge of our own journey and allows us to focus on what we believe is important for our clients, our colleagues and the communities we work and live in. We have more than 100 years’ experience in the water sector and are experts in every aspect of water development, with all the skills and commitment to deliver solutions that benefit every stakeholder.  We also established Mott MacDonald Bentley more than twenty years ago to deliver long-term programmes of work through a strategic focus, effective communication and flexibility in different models of working.  We are experts at building a trusted relationship with our clients. From investment planning to operational support, design to capacity building we work with private investors and listed companies, as well as national and local governments across the world in both developing and developed regions. As advisors, we think laterally and find the connections that others fail to make. We are pioneers with a thirst for innovation, who understand the challenges facing the water industry today, including biodiversity net gain, natural capital and ecosystem services, the practicalities of the journey to net zero, nature-based solutions and natural flood management and the need to consider everything from a fresh angle and turn obstacles into sustainable paths for both businesses and the lives they touch every day.

    Renewables & Energy Management
    Designers

    Water Network Hydraulic Modelling: Calibration Standards, Model Types, and Regulatory Requirements

    Hydraulic models of water distribution and wastewater networks are built in EPANET (open-source, US EPA), InfoWorks WS Pro (Autodesk), WaterGEMS (Bentley), or SewerGEMS using the governing equations: Hazen-Williams or Darcy-Weisbach for pipe friction, energy conservation at junctions, and mass balance. Model build includes pipe network (length, diameter, material, C-factor or roughness), demand allocation by zone (domestic, commercial, industrial) using DMA metering data, boundary conditions (reservoir levels, pump curves), and valve/control logic. Skeletonisation retains pipes above a threshold diameter (typically 100 mm for distribution, all mains for transmission) and aggregates smaller pipes as demand loads.

    Model calibration (WRc Hydraulic Calibration Standard, Mott MacDonald guidance, or AWWA M32) requires pressure residuals within 2 m and flow residuals within 5 percent for 85 percent of data points during a calibration trial. Calibration trials use SCADA pressure loggers (minimum one per DMA, target 3 to 5), flow data from district meter area (DMA) meters, and fire flow tests (controlled step tests). Demand multipliers (peaking factors) are calibrated against metered consumption data: typical domestic peaking factor 1.8 to 2.5 (peak hour to average daily). Chlorine decay modelling (bulk and wall decay) is an extension capability required for water quality modelling under US EPA Surface Water Treatment Rule.

    Hydraulic models are used for: leakage management (night flow analysis, pressure management zone design), capital investment planning (pipe replacement prioritisation, new source integration), real-time operational support (cloud-SCADA integration, digital twin), and regulatory reporting (Ofwat in England and Wales, EPA in US). Steady-state models answer pressure zone and capacity questions; extended period simulation (EPS) is required for water quality, storage tank cycling (target 80 percent daily turnover), and pump scheduling optimisation. Model build cost for a medium utility: $100,000 to $500,000; annual model maintenance (update for network changes, re-calibration): $20,000 to $80,000.

    Post your hydraulic modeling project — get matched proposals

    Frequently Asked Questions

    What is a hydraulic model used for in water supply?

    Hydraulic models are used for: (1) Capital planning - identifying pipe capacity constraints, sizing new mains for development connections, and prioritising pipe replacement based on hydraulic underperformance and age; (2) Pressure management - designing pressure reducing valve (PRV) settings and locations to minimise background leakage (leakage is pressure-dependent per the fixed-and-variable-area discharge FAVAD equation); (3) Water quality - modelling chlorine decay and detention time to identify low-residual zones and disinfection by-product formation potential; (4) Emergency planning - assessing supply resilience under pipe burst, source failure, or demand surge scenarios; (5) Real-time operations - digital twin integration with SCADA for operator decision support and anomaly detection.

    How do you calibrate a water network hydraulic model?

    Calibration follows a structured process: (1) Collect data: pressure logger readings (minimum 7 days continuous at 15-minute intervals from 3 to 5 points per district meter area), DMA meter flow records, pump station telemetry, and reservoir levels; (2) Run model in EPS mode with measured boundary conditions; (3) Identify discrepancies: pressure errors above 2 m at 15 percent or more of logger locations indicate poor calibration; (4) Adjust model parameters: demand multipliers (most sensitive), pipe roughness (C-factor or roughness height), and model topology (missing connections, incorrectly coded valves); (5) Validate against an independent dataset not used in calibration. WRc Good Practice Guide specifies that calibration trials should include at least one artificial loading event (fire flow test or pressure step test) to perturb the network from normal operating state.

    What software is used for hydraulic modelling?

    The dominant commercial platforms are: InfoWorks WS Pro (Autodesk, formerly Innovyze) - most widely used in UK water companies (90 percent of Ofwat-regulated companies); WaterGEMS/SewerGEMS (Bentley) - widely used in US and international markets, integrates with AutoCAD and GIS; InfoWorks ICM - integrated catchment modelling combining hydraulic and hydrological models for real-time flood and drainage systems. EPANET 2.2 is the free, open-source US EPA platform for research, smaller utilities, and developing markets. SWMM (Storm Water Management Model) is the equivalent open-source tool for sewer and stormwater systems. GIS integration (ArcGIS, QGIS) is standard for model build and results presentation. Real-time digital twin platforms (IBM, Idrica, Xylem) layer AI analytics over these base hydraulic engines.

    What data is needed to build a hydraulic model?

    Essential inputs: (1) Network data - pipe asset register (length, diameter, material, year of installation) from GIS, minimum 90 percent completeness required before modelling; (2) Demand data - consumption by meter, billing zone, or land use category, with peaking factors from SCADA flow data; (3) Operational data - pump curves (H-Q characteristic from manufacturer or field test), reservoir dimensions and top/bottom water levels, PRV settings, valve states; (4) Boundary conditions - source flows, reservoir levels, interconnect meter readings. Data quality issues causing poor calibration: missing pipes, incorrect diameters from historical records, unrecorded illegal connections, and meter inaccuracies. Typical model build time for a 5,000-pipe network: 3 to 6 months including data acquisition, GIS processing, demand allocation, and initial calibration.

    Case Study·Municipal water distribution
    Challenge

    A South East England water company with 180,000 connections had no calibrated hydraulic model of its distribution network. Ofwat's AMP8 leakage reduction target required a 20 percent reduction over 5 years. The existing pressure management approach was based on manual PRV adjustments and was failing to detect newly developed low-pressure zones as the network was extended for new housing development.

    Approach

    Built an InfoWorks WS Pro model of the full network (22,000 pipes) using GIS asset data, bulk supply metering, and DMA metering. Conducted a 14-day calibration trial with 45 pressure loggers and step-test flow measurements. Calibrated within WRc standard (85 percent of pressure residuals within 2 m). Used the model for pressure management zone redesign, identifying 8 new optimal PRV locations and target setpoints across 12 zones.

    Outcome

    Leakage reduced 18 percent in the first year post-pressure management implementation (PRV setpoints optimised using model). Average zone pressure reduced from 58 m to 47 m (19 percent reduction). Burst rate fell 25 percent in the modelled zones within 12 months. The hydraulic model was subsequently used to assess 14 housing development connection requests, replacing individual flow surveys at a saving of 80,000 GBP in field investigation costs.

    Questions to Ask Shortlisted Providers

    1. 1

      What software platform do you use, and does it integrate with our GIS and SCADA systems in a format we can maintain in-house after handover?

      The value of a hydraulic model depends on it being updated as the network changes. A model built in a platform your team cannot use (due to licence cost, skill, or format incompatibility with your GIS) becomes stale within 6 months. Confirm the platform licence cost and confirm your team will receive training and can maintain the model without the modelling consultant's involvement after handover.

    2. 2

      What calibration standard will you work to, and how many pressure loggers and DMA meters will the calibration trial require?

      WRc Hydraulic Calibration Standard specifies that 85 percent of pressure residuals must be within 2 m of measured values. Meeting this standard requires a minimum of one logger per DMA, with at least one artificial loading event (step test). A consultant who proposes calibration without step tests is likely to produce a model that passes visual inspection but performs poorly for predictive use.

    3. 3

      What level of demand allocation accuracy do you propose, and how will you account for unmeasured non-household demand (leakage, unregistered properties, standpipes)?

      Demand allocation is the largest source of model error after pipe roughness. Allocating demand only by billing records without adjustment for leakage distribution, peaking factors, or seasonal variation produces a model that calibrates under static conditions but fails under high-demand or fire flow scenarios. Confirm the demand allocation methodology and sensitivity analysis approach.

    4. 4

      Will the model be built to support water quality modelling (chlorine decay, age/residence time), and what additional parameters need to be specified for WQ capability?

      Water quality modelling requires additional parameters beyond hydraulic calibration: bulk decay coefficients (from bottle tests), wall decay coefficients (from field CT measurements), and demand patterns at the sub-DMA level. If water quality simulation is anticipated (e.g., for DWI compliance or PFAS source tracking), confirming that the model is built with WQ-capable parameters from the outset avoids a costly rebuild later.

    5. 5

      What model maintenance protocol do you recommend, and will you provide a data dictionary so our GIS and operations teams understand how to update the model when new pipes are commissioned or PRV setpoints change?

      A model built without a clear maintenance protocol degrades within 12 months as the network changes and boundary conditions shift. A data dictionary (defining which GIS attributes map to which model parameters, and specifying the update workflow for new connections, main renewals, and operational changes) is the professional standard for a model that retains calibration accuracy over its AMP cycle.

    What Drives Cost in This Category

    Network size and GIS data quality

    A 5,000-pipe distribution network model costs 50,000 to 120,000 GBP to build and calibrate. A 20,000-pipe network costs 150,000 to 400,000 GBP. Data quality is the dominant cost variable: networks with complete, accurate GIS asset registers (pipe material, diameter, year) reduce build time by 30 to 50 percent versus those requiring field verification of significant numbers of records.

    Calibration trial complexity

    A 7-day pressure logging calibration trial with 20 loggers and 2 step tests costs 15,000 to 40,000 GBP in field and data analysis. Extending to a 14-day trial with 45 loggers and 5 step tests (for a large or complex network) costs 40,000 to 80,000 GBP. The calibration trial is the quality-determining investment; under-investing in calibration data produces a model that fails in predictive use.

    Real-time digital twin integration

    A static calibrated hydraulic model costs 50,000 to 400,000 GBP. Integrating the model with SCADA for real-time updating (digital twin) adds 100,000 to 300,000 GBP in data integration, API development, and cloud hosting. Annual hosting and maintenance for a real-time digital twin runs 30,000 to 80,000 GBP per year. Justifiable for utilities with above 100,000 connections where the operational optimisation value exceeds this cost.

    Annual model maintenance

    A calibrated model requires annual updates for: new mains commissioned (housing development, renewal), PRV setting changes, source changes, and demand growth. Annual model maintenance costs 15,000 to 50,000 GBP depending on the rate of network change. Without maintenance, model calibration degrades by approximately 10 percent per year; after 3 to 4 years an unmaintained model requires full recalibration at full rebuild cost.

    Key Regulations & Standards

    Ofwat AMP8 Leakage Performance Commitments -- Hydraulic Model as Evidence Base

    Ofwat's PR24 Final Determination includes leakage reduction as a primary performance commitment for all water companies in AMP8 (2025 to 2030). UK water companies must provide an evidence base for their leakage management strategy, including pressure management optimisation. A calibrated hydraulic model is the standard tool for demonstrating the technical basis for PRV setpoint optimisation and zoning decisions submitted as part of annual performance reporting.

    WRc Hydraulic Calibration Standard -- Model Quality Requirements

    The WRc Hydraulic Calibration Good Practice Guide specifies that a calibrated water distribution network model must achieve: 85 percent of pressure residuals (model minus measured) within 2 m; 90 percent of flow residuals within 5 percent; and the model must be validated against an independent dataset not used in calibration. Models not meeting WRc standard are not accepted for investment justification submissions to Ofwat or for regulatory leakage reporting.

    Water Industry Act 1991 and Ofwat Information Requirements -- Network Performance Reporting

    Water companies must report network performance data to Ofwat under the Water Industry Act 1991 and associated Information Notices. Hydraulic models are used to produce the reports on pressure zone compliance (minimum pressure at all properties), leakage estimates (by zone and total), and supply interruption risk modelling. Ofwat scrutinises the technical basis of these reports; models that cannot demonstrate calibration to WRc standard are subject to challenge.

    UK NIS Regulations 2018 -- Hydraulic Model Data as Critical Infrastructure

    Hydraulic model data for water distribution networks (network topology, pressure zone boundaries, operational setpoints) is considered sensitive critical national infrastructure data. The UK NIS Regulations 2018 require water companies (as operators of essential services) to protect this data from unauthorised access. Hydraulic model files and real-time SCADA-connected digital twin data must be protected under cyber security policies aligned with the NCSC Cyber Assessment Framework.

    Explore Related Categories

    Modeling Inputs

    Leak Detection CompaniesSmart Water Meter CompaniesPressure Management Companies

    Digital Twins

    Digital Water Solution CompaniesAI Water Treatment Companies

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