Water Efficiency Archives | UKGBC /focus-areas/water-efficiency/ The voice of our sustainable built environment Thu, 09 Jan 2025 10:59:03 +0000 en-GB hourly 1 /wp-content/uploads/2023/02/cropped-UKGBC-favicon-1.png Water Efficiency Archives | UKGBC /focus-areas/water-efficiency/ 32 32 Shower Sensor to Reduce Water Usage /resources/shower-sensor-to-reduce-water-usage/ Mon, 13 Nov 2023 11:08:21 +0000 /?post_type=resource&p=53731 Solution to monitor length of showers and promote more sustainable water habits.

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Problem Addressed

Statistics collected by the show that showers and baths are responsible for theĢż highest percentage of water usage in an average household. With an average shower length between 6-8 minutes and an average flow rate of 12 litres per minute, reducing shower length by 2-3 minutes daily could save between 5,200 to 9,360 litres of water per person per year. By reducing hot water consumption, this would also reduce energy use and CO2 emissions.

Solution Overview

The Aguardio Shower Sensor can help reduce hot water consumption by providing access to showering insight data and encouraging sustainable behaviours. No changes to bathroom fixtures are required and it can be easily DIY installed in less than 60 seconds with durable, double-sided tape. The sensor works by detecting movement, frequency of water noise, temperature, and humidity to determine when a shower is being used. Shower time and water pauses (like while shampooing) are displayed in real-time, creating a documented reduction in shower duration and promoting lasting behavioural changes.

Aguardio has found that this sensor results in up to a 30% reduction in shower time in homes and a 21% reduction in hospitality and tourism. Messages can also be used to change shower time and reduce both water and energy. Surrey and Cranfield Universities have carried out extensive projects on shower behaviour using the Aguardio Shower Sensor. By collecting humidity and temperature information, the sensor can be useful for monitoring health issues in a bathroom and identifying where mould may be present.

Data from the sensor can be sent via Bluetooth to their digital Hub or App, and raw data can also be integrated with other systems using open API. Facilities managers can use the sensor data to access invaluable information about their customers’ shower usage, thus providing hot water where and when it is required. There is no maintenance required with the battery lasting 3 years. The ROI depends on shower usage but can be between 9-18 months. Additionally, the data provided by the sensor is useful for preventative maintenance and monitoring water usage and hot water generation. The Aguardio Shower Sensor improves the overall sustainability of a building and can even earn points towards building certifications.

Case Study

Aguardio Shower Sensors were tested in seven tourism accommodations in Europe and North America. Over 25,488 showers were measured to test the effectiveness of real-time feedback on shower duration. Guests were given persuasive messages reflecting pro-environmental values to encourage shorter showers. The result was that the average duration of showers was reduced by 13.56% on average, with the most effective messaging tested resulting in a 21.27% reduction across all the accommodations. Per room per year, this intervention would save 4.44 M3 of water, 0.19 MWH of energy, and 33kg of CO2.

Facts and Figures

Up to 30 %
9-18 months
Ā£100-130

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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85% water savings toilet /resources/85-water-savings-toilet/ Tue, 26 Sep 2023 07:14:22 +0000 /?post_type=resource&p=52439 IoT connected water and energy saving toilet solution

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Problem addressed

Despite the vital role it plays in effective sanitation, the toilet has not fundamentally changed since the late 1800s. According to Propelair, UK toilets use an average of and accounts for up to 70-85% of commercial water use in buildings. As water is becoming an increasingly valuable and costly resource, organisations can cut their carbon footprint and water costs by switching to a more resource efficient toilet.

Solution overview

Developed to address this challenge, Propelair OneThreeFive toilet utilizes only 1.35 litres of water for a 100% clean flush and is, one of the world’s most water efficient toilets, saving up to 85% of water compared to the average conventional toilet. This translates into water bill reductions of up to 60% meaning that a return on investment can be in as little as one year, bringing clear financial benefits to customers operating in the healthcare, manufacturing, retail, education, transport, commercial and industrial markets.

Propelair is one of the most water efficient, economical, and hygienic toilet systems.Ģż It has a concealed cistern with an isolated water reservoir, an air-pump, and an electronic control unit.Ģż To perform a quick flush, the lid is closed to form a seal and channel the air.Ģż Minimal water washes the pan, followed by a high velocity jet of air that removes the waste.Ģż The contents, odors and germs cannot escape due to the sealed lid. The remaining water fills the water trap, and the toilet is ready to be re-flushed in 13 seconds, making it ideal for high-traffic, public areas.

The Propelair toilet can be easily retrofitted to existing drainage systems and is equipped with a smart IoT-connected system, that provides feedback to service engineers through data transmission, streamlining maintenance and diagnostic alerts, and ultimately reducing downtime.

Its ā€˜asset tracking software’, integrated with quick response codes, offers after-sales service and empowers facility managers to remotely monitor each toilet’s status and promptly schedule maintenance call outs when issues are reported by the automated system.

Tripple hygiene for Propelair OneThreeFive: the Propelair OneThreeFive ensures superior hygiene compared to regular toilets. Antimicrobial additives reduce germ growth on touchable surfaces, the close-to-flush technology limits germ dispersal, and the strong flush effectively removes contaminants.

Case study

The Sustainable Ventures HQ in London is now saving 1,100 litres of water a day by switching to Propelair. By installing 13 toilets in their coworking space, their water consumption has been reduced by more than 84 litres per toilet, per day. In the 38 working days tested for savings in 2021, the company saved 41,562 litres – equivalent to 138 full baths or filling one bath every day from 1 January until 22 May. Sustainable Ventures also reduced the carbon footprint of their workspace by 58kg – equivalent to 5.7 gallons of diesel, or 146 miles driven by an average car.

Facts and Figures

85 %
1.35 L
Up to 60 %
<1 Year

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Toilet Leak Sensors /resources/toilet-leak-sensors/ Mon, 24 Jul 2023 14:24:09 +0000 /?post_type=resource&p=48880 Identify toilet leaks using temperature sensors to reduce wasted water.

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Problem addressed

There are an estimated 50m+ toilets in the UK, and according to Waterwise, of toilets are leaking. Dual flush toilets, introduced in the 1980’s are susceptible to leaking, and undetectable leaks (invisible to the naked eye) can waste 11 litres or water per hour.

To put this into perspective, if 10% of leaks are undetectable that is an estimated 218,000 Olympic sized swimming pools of fresh water being wasted and all the associated energy required in filtering and pumping that water.

The cost of this water can result in higher than expected bills too.

Solution overview

The Aguardio Sensor can identify leaks down to 4 litres per hour, it has a 10+ year battery and costs just over a 1p /day.

The Aguardio Leak Sensor is also capable of counting toilet flushes. This can be used to gain insights into individual toilet usage which could be used to assist with cleaning routines and preventative maintenance. The sensor is very simple to install by connecting the unit to the toilet in the water inlet pipe with a plastic tie. The sensor is fitted with temperature sensors, one measures the pipe temperature and the other the ambient temperature. The sensor takes a reading every 3rd second so if there is a water leak cooler water will be drawn into the pipework and the sensor will pick it up. The connected version can detect flushes as the temperature change will be more significant. When a leaking toilet is detected, the sensors trigger an alarm that alerts residents to address the issue promptly by calling the service staff. The technology has been tested by Teknologisk Institut, the leading independent test institute in Denmark.

The solutions also has some health benefits. For example care homes could also monitor occupant’s toilet usage which could be an indication of their health status. In hospitals it can be used to monitor toilet usage and hand washes routines to ensure people are actually washing their hands in proportion to toilet usage. With suitable nudges, Aguardio has seen improvements of hygiene routines.

Cost of the product depends on quantities and whether it is used as a standalone item or connected to the Aguardio Hub, but they typically cost approximately £30-£50 per item. Since a slight toilet leak can result in an additional usage of 100m3 of water per year this could cost in the region of £250 per year. There is no maintenance, and the battery will last in excess of 10 years.

Case study

Aguardio has installed these in several locations in Europe, including being used by Denmark’s 4th largest housing company. The company ordered 12,000 sensors to be deployed in stages, with each stages insights informing the next. Based on the installation of 3660 sensors the sensors have proven to be highly effective. The sensors also detected toilet leakages as high as 17%. Find out more about this case study .

Facts and Figures

Ā£35-Ā£50
10+

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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System to flush toilets with waste water from AC units /resources/system-to-flush-toilets-with-waste-water-from-ac-units/ Wed, 12 Jul 2023 15:35:53 +0000 /?post_type=resource&p=48697 Enabling waste condensate from air conditioning units to be stored and recycled as flushing water for toilets to reduce water footprints.ĢżĢż

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Problem addressed

Billions of litres of condensate water from air conditioning units are drained to waste every year, and this is only going to increase as demand for air conditioning rises as a result of the climate crisis. Alongside this, many places are becoming more water stressed, yet clean and expensive mains water is often used to flush toilets.ĢżĢż

Solution overview

Encore Cistern enables condensate from air conditioning units to be stored and recycled as flushing water for toilets. The cistern works exactly like a traditional cistern with the exception that it has an extra filling connection to allow a separate water source to be introduced (from the air conditioning unit). The Encore can hold 18 litres of water; three times more than traditional cisterns. Despite this the Cistern has no additional spatial requirements, it is designed to fit in standard service voids. The Encore has a dual-chamber design. When the air conditioning system is in use, both chambers are filled with condensate, and when the toilet is flushed, the lower chamber is replenished by the upper chamber, to ensure a quick refill. If there are multiple flushes in a short period of time, the Encore cistern is filled the conventional way.ĢżĢż

The Encore cistern can be used in all concealed toilet installations, both new and existing, and is the first and only cistern to give BREEAM credits and LEED points. In addition the materials in the cistern are fully recyclable.ĢżĢż

Case study

Encore installed their cisterns in Warrington with a global facilities management company to demonstrate that condensate does play a major role in sustainability, even here in the UK. Recovering condensate waste that is normally sent to drain will not only save users money, it will also help achieve water conservation goals, saving billions of litres of water each year.Ģż

Installing Encore’s cisterns and metering the mains water gave an overall usage of each toilet. Data obtained from June 2018 – November 2019 clearly highlights the Encore’s water-saving abilities.Ģż

The traditional toilet used 85,882 litres, whilst the Encore cistern 1 used 11,753 litres and Encore cistern 2 used 26,481 litres.ĢżĢż

Combined consumptions of the two Encore cisterns, and taking the average showed an incredible water saving of 66,765 litres and an impressive Ā£212.98 based on water rates including waste @Ā£3.19mĀ³ĢżĢż

Annual savings based on the figures above using the traditional cistern and Encore cistern 2, would show a ROI in 15 months based on the cost of a single unit being Ā£160.00.Ģż

Facts and Figures

12-36
Ā£160

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Range of digital solutions to deliver sustainable infrastructure /resources/range-of-digital-solutions-to-deliver-sustainable-infrastructure/ Wed, 29 Mar 2023 12:38:44 +0000 /?post_type=resource&p=40348 Digital solutions platform enabling infrastructure professionals to drive improved, sustainable outcomes across the asset lifecycle.

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Problem addressed

Data is everywhere but insights are not. To achieve UKGBC’s mission of radically improving the sustainability of the built environment we need to understand the data we have available and use it to take action to impact outcomes. Whether its reducing water lost to pipe leaks, getting the most out of renewables, or finding new ways to build that produce less carbon, Moata solutions help drive sustainable outcomes on infrastructure projects by providing the insights needed to make better decisions.

Solution Overview

Moata solutions use data to transform infrastructure design, delivery, and operation, significantly impacting the sustainability of projects. Solutions cover a range of different sectors and activities across the infrastructure lifecycle, from planning and concept design for new assets, right through to the operation and maintenance of existing ones. Browse the list of the solutions below to find the ones right for your project and request a demo.

Solutions include:

  • models the embodied carbon of new assets, enabling anyone on a project to make low carbon choices to decarbonise infrastructure.
  • gives investors and asset owners measurable insights into the environmental and social impacts of their infrastructure assets.
  • : enables input of fieldwork activities in real-time and tracking of inventory for accurate maintenance cost data and improved claims recovery.
  • allows you to manage all you your geotechnical monitoring data and get the most out of construction projects by reducing geotechnical uncertainties.
  • is a highly flexible and visual GIS platform that lets users rapidly access and collaborate around geospatial data, saving time and reducing project risk.
  • uses data to generate integrated dashboards that present project team members with a live, accurate assessment of performance.
  • puts field inspection data at your fingertips with customisable and configurable smart forms for everything from health and safety visits to asset condition surveys.
  • provides a vast library of compliant, parametric 3D digital assets, drastically reducing the design time and cost of creating and recreating assets for specific projects.
  • changes the way all aspects of land projects are managed by blending both spatial and nonspatial data in an easy-to-use system.
  • revolutionises the pipeline design process, using a geospatial interface, ground-breaking genetic algorithm, and domain expertise to generate an optimised route.
  • is a suite of solutions for the renewable energy market that helps solve challenges associated with intermittent renewables, such as solar and wind.
  • is an online self-assessment tool for measuring a businesses’ digital maturity across the entire asset life cycle so blind spots and priorities can be identified.
  • is a suite of solutions that uses visual models to provide real-time and predictive insights into water asset performance to enable proactive maintenance.
  • helps manage building information modelling data during design, delivery, and operation, enabling multidisciplinary teams to collaborate for a better built environment.

Pricing varies depending on which solution/s you select. Please use the contact form at the bottom of to talk to an expert and get a quote. To give an indication, the monthly price of Moata Carbon Portal, at time of publication, ranges from £1950 to £4450 depending on project size.

Case study

Read about how Moata Carbon Portal was used on the London Underground’s or by Highways England on the to cut carbon emissions.

Find all Moata case studies .

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team atĢżmedia@ukgbc.org.

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IoT remote monitoring solution /resources/iot-remote-monitoring-solution/ Tue, 29 Nov 2022 10:00:11 +0000 /?post_type=resource&p=30124 IoT remote measurement solution that enables significant business improvements.

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Problem Addressed

Companies use high man power to gain asset understanding and to find ways to improve carbon footprints. Plexus Innovation’s GUARDIANĀ® helps companies overcome challenges including data overload and compliance and helps them on the road to Net-Zero. GUARDIANĀ® reduces water waste, unnecessary energy use and the need for vehicles on the road in certain scenarios due to the IoT’s remote nature, which consistently uncovers new and innovative ways to be environmentally sustainable.

Solution Overview

Plexus Innovation offers an IoT remote monitoring solution – providing a digital alternative to manual measurement, bringing business improvements in a number of sectors.

The company’s GUARDIANĀ® technology remotely measures temperature, pulses, humidity, and CO2, allowing you to manage water systems, cold chain storage and refrigeration; along with air quality, and damp and mould detection.

Many customers are using GUARDIANĀ® to tackle reducing their water waste, some saving up to 80% within months of installation. Others are focusing on reduction of energy consumption, or on ensuring compliance on environmental health and risk for tenants.

The remote technology is attracting clients focused on Net Zero and business improvements including better use of manpower and delivering improved service to their own customers.

It is an innovative proprietary product that addresses legislative issues, pushing compliance and asset management into the 21st Century.

A typical time scale for ROI is within 12 months. For those who are challenged with reducing risk of human error, operational costs, water waste, energy consumption or environmental impact, GUARDIANĀ® is now a must-have technology.

Case Study

Selwood Housing was finding the traditional manual approach for monthly temperature checks cumbersome and administration heavy, using high manpower to gain limited asset understanding. On switching to GUARDIANĀ® the phase one results were immediate:

  • 75% reduction in flushing requirement and associated water waste
  • Numerous potential scald risks, due to failing TMVs, identified via alerts received

When implemented across phase two, a further 21 facilities, the results included saving:

  • 28 days of manpower
  • 11 tonnes of associated CO2 (equivalent to 66 trees)
  • 240m3 water (3200 domestic baths)
  • 4900 kWh energy

The data gives them a better understanding of their TMV performance and whether there is a scalding risk enabling them to take relevant action.

Facts and Figures

12 Months

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Platform for leak detections and water analytics /resources/leak-prevention-water-analytics/ Thu, 29 Sep 2022 17:38:53 +0000 /resources/leak-prevention-water-analytics/ Intelligent real-time monitoring to identify sources of leaks and waste preventing damage, reducing consumption and cutting the resulting carbon emissions.

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Problem Addressed

Water scarcity is becoming an increasingly prevalent issue across the globe. Its conservation is therefore of the utmost importance, and is challenged by wastage through abnormal use, overuse and leaks. Leaks and water damage can also cause businesses to incur extensive water and repair bills. WINT prevents this hazard and the associated hassle.

Solution Overview

WINT’s system is a leak detection and water analytics device. If there is a leak, the system identifies its location and shuts off the water supply. The meter-lookalike is installed onto the pipework infrastructure and uses AI technology to determine water usage. It then provides real-time, accurate data to scan for leakages and give the user data on their water consumption. It is a standalone solution that uses a sim card to talk to the 24/7 situation room, and requires a 230v power supply.

After 3 weeks of installation, algorithms will have identified the location’s typical water usage and will flag any usage that surpasses this value. The system will then either shut down or will send an alert to someone at the location. On average, customers will save 20-25% on their water usage through leak prevention coupled with this water usage evaluation.

Payback on the WINT system usually works between 12-18 months. However, some installations that have identified issues earlier have seen a payback of 1-2 months.

Case Study

The Empire State Building

Though a comparatively small leak, the fault was located on the water feed to the cooling tower and went undetected for several years. The installation prevented the loss of millions of gallons of water and the potential long term damage to the building that would have accompanied it, instantly realising savings of up to £75k per annum.

Facts and Figures

12-18 Months

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Tools to determine the impact of development on nature /resources/tools-to-determine-the-impact-of-development-on-nature/ Wed, 16 Mar 2022 16:58:09 +0000 /resources/policysupport-org/ A suite of tools to provide rigorous spatial evidence in development decision making.

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Problem Addressed

This solution was sourced in response to UKGBC’s Innovation Challenge: “How can communities and local authorities implement, maintain, and assess the impact of nature-based solutions to enhance climate resilience?”

Policysupport.org believes that policy for sustainable development can be better (more equitable and more effective) when based on the available scientific evidence. It has therefore focused on bridging the gap from scientific data and knowledge to policy and management decision-making by building and deploying data-intensive, science-based spatial policy support systems. The suite of tools enables science to be delivered in more actionable formats.

Solution Overview

Policysupport.org consists of a suite of tools to provide rigorous spatial evidence in development decision making. The tools include Co$tingNature, WaterWorld, EcoActuary and FreeStation.

Co$tingNature, WaterWorld and EcoActuary are sophisticated spatial policy support systems that bring together the best available spatial data in easily used web based spatial policy support systems which help to understand:

  1. The impact of development on Nature and of Nature on development (Co$tingNature);
  2. The impact of development on Water resources and water risk (WaterWorld);
  3. The impact of development and climate change on flood risk (EcoActuary).

FreeStation is a suite of designs for self-build low-cost internet-of-things monitoring devices and associated build, maintenance, and deployment guides for monitoring the effectiveness of nature-based solutions at spatial or temporal scales too fine – or situations too complex – for modelling. Together this suite of tools significantly reduces technical and financial barriers to use of rigorous spatial evidence in development decision making.

All are freely accessible for non-commercial use and licensed for commercial use. The annual license depends on the level of functionality required, but ranges from £1000-£9000 currently. These licenses include support.

Verification & Case Study

The policysupport.org suite of tools are designed to calculate the impact of different solutions at design stage or post-implementation and through spatial mapping or multi-point direct monitoring in the landscape.

Case Study:ĢżSince these tools represent a wide range of solutions it is best to consult which documents them.

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Tool for mapping natural capital assets and ecosystem services /resources/tool-for-mapping-natural-capital-assets-and-ecosystem-services/ Wed, 16 Mar 2022 16:20:58 +0000 /resources/ecoservr/ Detailed spatial models to show the extent and configuration of different habitats.

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Problem Addressed

This solution was sourced in response to UKGBC’s Innovation Challenge: “How can communities and local authorities implement, maintain, and assess the impact of nature-based solutions to enhance climate resilience?”

Solution Overview

EcoservR seeks to bring together data from a variety of nationally available sources to provide greater spatial clarity on ecosystem services and natural capital assets, which can be difficult to assess. EcoservR is a tool for mapping natural capital assets and ecosystem services developed as an open-source, free-to-use R package.

EcoservR takes data from nationally available datasets such as Ordnance Survey (OS) MasterMap, OS Greenspace, Priority Habitat Inventory, CORINE Land Cover, Crop Map of England and more to create a detailed habitat map. From this habitat map and supporting data, EcoservR measures supply for seven ecosystem services, and demand for four. Unlike spreadsheet-based tools which return a single score, EcoservR uses spatial models which consider not only the extent of different habitats but also their configuration. It returns heat maps showing the distribution of supply and demand across the landscape.

A powerful application of EcoservR is to calculate the change in ecosystem service supply pre and post-intervention, to predict the potential impact (uplift) of a design. This change can be calculated at any desired geographic extent, from site to landscape-scale.

By overlaying supply and demand maps, the user can also identify areas of opportunity (ā€œpinch pointsā€) where NBS would improve capacity and/or answer demand for ecosystem services.

The toolkit is freely available for anyone to use, in practice, a person with programming and GIS skills is best placed to conduct the analysis efficiently and rigorously. There may therefore be an organisational need to upskill planners or outsource the analysis to experienced consultants.

Verification & Case Study

The tool has had its effectiveness measured through continued monitoring of modelled interventions following the Urban GreenUP project, demonstrating environmental net gain in these areas. It is also subject to habitat classification being tested and reviewed when local data (e.g. Phase 1 ecological survey) are available to make models and predictions as accurate as possible. The impact of this can be demonstrated through continued usage of the tool in Liverpool City Region to assess the impact of NBS to achieve greater climate resilience as well as other ecosystem service benefits.

Case Study:

The EcoservR approach was chosen by architects and designers EcoResponsive Environments to support their application to the ā€œVision of the Futureā€ competition hosted by the Royal Institute of British Architects. Their brief was to transform The Heath Business and Technical Park in Runcorn, Cheshire into a sustainable living and commercial site. Their design included several nature-based solutions such as street trees, woodland creation and restoration, water management through SUDs, and the creation of a long natural corridor for green travel and recreation.

EcoservR was used to model ā€œbeforeā€ and ā€œafterā€ assessments of natural assets and ecosystem services, and helped EcoResponsive Environments evidence their ambition to deliver environmental net gain with the new Heath Park development, with notable gains predicted for air purification, carbon storage, heat island effect reduction, noise regulation and pollination, for instance. They won the RIBA competition in 2020 and have since used the outputs from the first analysis to feed into other tools, like GI-Val for economic valuation of ecosystem services.

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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Smart Blue-Green Roof /resources/smart-blue-green-roof/ Tue, 08 Mar 2022 11:23:53 +0000 /resources/smart-blue-green-roof/ Smart roof system which is part of a climate and water resilience research project.

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Problem Addressed

This solution was sourced in response to UKGBC’s Innovation Challenge: “How can existing buildings be made more resilient to climate change, with as little disruption to their occupants as possible, by 2030?”

The ‘smart’ blue-green roof from Polypipe Civils & Green Urbanisation (applied to Bruntwood Works’ Bloc) is addressing the need to develop greater understanding of how new construction and data technologies can help cities and urban developments to mitigate the impact of climate change and population growth, while enhancing biodiversity.

Solution Overview

This two-year roof research programme will demonstrate the multifunctional potential of green urbanisation. The ā€˜smart’ blue-green roof will assess how storing and reusing rainwater at roof level can reduce the volume of surface run-off entering its sewer network. It will help lower the flood risk associated with the prolonged high-intensity storm events. Unlike conventional green roofs, which use a drainage layer to remove rainwater, the 525 sq m blue-green structure retrofitted to Bloc’s flat roof stores rain beneath the planted surface where it lands. Advanced passive irrigation components within the attenuation layer draw water up through the structure to the underside of the green roof substrate to support surface planting.

The technology protects green areas during drought, reduces potable water demand during hot weather and enhances biodiversity by maintaining flora in optimum growing conditions. The roof and its outlet are cloud enabled, linking the stored volume to high resolution weather data that maps storm events so the roof is told when a storm is due. Before it arrives, volume is safely released to accommodate arriving rainwater, avoiding any surcharging of the local and downstream drainage network.

The roof reduces the discharge of rainwater and features wildflowers to support biodiversity and provide an additional thermal barrier. This is Manchester city centre’s first wildflower roof which also aims to attract a rare native butterfly, the Manchester Argus.

A review of the existing roof structure is required prior to implementation to ensure structural capacity is adequate for the blue/green roof system. Retrofitting the system had minimal impact on existing occupants as works took place away from building tenants and noise was minimal. No relocation was necessary. Due to the materials needed for the roof, kerbside delivery arrangements with further crane lifting to roof level need to be made.

Indicative investment requirements for a similar project elsewhere:

  • Roof area size – 525 m2.
  • Green / blue roof system size – 462 m2.
  • CAPEX – approx. Ā£150 / m2 for green-roof supply and install waterproofing, insulation, levelling, structural engineering.

Benefits:

  • Financial – possible financial incentives to disconnect surface water from the combined sewer system within the network.
  • Brand and marketing – customers are increasingly expecting businesses to demonstrate how genuine their sustainability strategies and plans are. Bloc is a market-leading workspace, for which the blue-green roof has helped attract new customers aiming to align their business with its sustainability credentials.
  • Biodiversity – Increasing wildflower cover to attract species.
  • Adaptation and resilience – Whilst global commitments towards the Paris Agreement are strengthening, no matter what efforts are made to reduce emissions, the climate will change. Only from the implementation of solutions like the blue-green roof will it be possible to continue to operate and utilise our buildings and wider infrastructure safely and inclusively.

Verification & Case Study

The roof system is currently part of a research project being monitored and reviewed by Salford University. The roof’s effectiveness is verified in a variety of ways:

Managing rainfall as a resource: United Utilities verify the benefits of the roof intercepting and re-using rainfall, to consider how this can impact the drainage system during points of heavy rainfall and to record how much has been used as a resource by the blue-green infrastructure.
Impact on biodiversity: By introducing integrated natural habitats across the urban landscape, this not only creates healthier, more resilient communities that are highly carbon and energy efficient, but also improves the mix of flora and fauna found in the city centre.
Climate resilience: The roof creates additional space to store excess rainfall in the face of increasingly frequent large storm events due to climate change. The water is then stored and reused for passive irrigation delivering a resilient asset that continues to thrive in periods of drought.

The technology installed on the roof is scalable and could be connected to multiple roof spaces and attenuation tanks to offer a catchment-wide solution where water is gradually released into the natural watercourse to make space for large storm events and reduce the risk of flooding. Harvested rainwater can be used for a wide range of non-potable applications across both commercial and residential projects. Reducing potable (mains) water consumption in toilets, laundries and cooling systems, protects drinking water supplies during extended dry spells and can lower overall utility bills.

The project and outcomes will be monitored and reviewed by Salford University across a two year period.ĢżUpon completion of the two-year roof programme, the roof will demonstrate:

  • The impact of such a system on surface water runoff.
  • The impact of increased green infrastructure cover in the area.
  • The viability of such a structure in the development process (new build and retrofit).

This page presents data, evidence, and solutions that are provided by our partners and members and should therefore not be attributed to UKGBC. While we showcase these solutions for inspiration, to build consensus, and create momentum for climate action, UKGBC does not offer commercial endorsement of individual solutions. If you would like to quote something from this page, or more information, please contact our Communications team at media@ukgbc.org.

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