Catherine Treagus-Mullan, Associate Director, Water & Environment and Neil Mason, Associate Director, share insights on the benefits of integrating traditional engineering with smart sewers to improve river health.
In recent years, the health of our rivers has come under increased attention. With growing concerns about pollution, flooding, and biodiversity loss, the need for innovative solutions has never been greater.
By integrating traditional engineering methods with smart sewer systems and nature-based solutions, we can significantly enhance river health and, in turn, foster community well-being and resilience.
The Challenges of Short-Term Solutions
Rivers are the lifeblood of our ecosystems, yet, many rivers in the UK face significant challenges due to pollution from agricultural and highway runoff, sewage overflows, and urban development. Climate change exacerbates these challenges, leading to more frequent and intense flooding events.
Traditional engineering solutions—such as concrete channels and flood defences—often prioritise immediate human needs whilst neglecting the long-term health of river ecosystems. While these measures may offer short-term relief, they frequently fail to address the root causes of river degradation.
The Role of Smart Sewers
Smart sewer systems harness advanced technology to monitor and manage wastewater more effectively. By using advanced technology—such as sensors and data analytics—these systems can monitor flow rates, detect blockages, and identify pollution sources in real-time. This approach allows for quicker responses to issues, reducing the likelihood of sewage spills that can harm river health.
As we enter Asset Management Period 8 (AMP8: the eighth phase of the regulatory framework cycle, running from April 2025 to 2030 setting out expectations for water companies in England and Wales) water companies are being encouraged to invest in smart sewer technologies as part of their commitment to improving water quality.
By integrating these systems into existing infrastructure, we can enhance our ability to manage stormwater and reduce the risk of pollution during heavy rainfall events.
Nature-Based Solutions: A Complementary Approach
Nature-based solutions (NbS) offer a holistic way to tackle environmental challenges by leveraging natural processes. These solutions can include restoring wetlands, creating green roofs, and planting trees along riverbanks. Not only do these initiatives improve water quality, but they also enhance biodiversity and provide valuable recreational spaces for communities.
For example, restored wetlands can act as natural sponges, absorbing excess rainwater and filtering pollutants before they reach our rivers. Similarly, planting trees stabilises riverbanks, reduces soil erosion, and improves water quality. By incorporating NbS into our planning and operations, we can deliver multiple benefits that extend beyond water management, aligning with broader environmental goals such as combating climate change and enhancing public health.
A Case Study: United Utilities’ Better Rivers Framework
The benefits of these integrations can be seen in Tetra Tech’s delivery of our client, United Utilities’ Better Rivers Framework
United Utilities has taken significant steps to improve river health through its Better Rivers Framework. The framework exemplifies how traditional engineering, smart technologies, and nature-based solutions can work together to create a sustainable approach to river management.
A key component of the Better Rivers Framework is the integration of smart sewer systems. By investing in real-time monitoring and data analytics, United Utilities can better manage its wastewater infrastructure. This allows for quicker identification of issues, such as blockages or pollution events, enabling more effective responses that reduce the risk of sewage spills into rivers.
In addition to smart sewers, the framework emphasises the importance of nature-based solutions. United Utilities is actively restoring wetlands and enhancing green spaces around rivers, creating habitats for wildlife and recreational areas for local communities. For instance, wetland restoration not only improves water quality by filtering pollutants but also provides vital ecosystems for various species, thereby enhancing biodiversity.
The Better Rivers Framework also involves community engagement initiatives, encouraging residents to participate in conservation efforts. By fostering a sense of stewardship, United Utilities helps communities connect with their local rivers. Educational programmes and volunteer opportunities empower residents to take an active role in protecting their waterways.
The framework also aims to address the impacts of climate change by implementing sustainable practices that enhance resilience. This includes creating green infrastructure, such as rain gardens and permeable pavements, which help manage stormwater runoff and reduce flooding risks. By combining these strategies, United Utilities not only improves river health but also contributes to the overall resilience of the surrounding communities.
“This is the most ambitious spill reduction programme ever proposed across the Northwest of England, bringing unique challenges as we navigate new regulatory rules, financial pressures, and a changing climate.
Working with our client and supporting and leading our team to bring innovation to those challenges is deeply rewarding and is exactly what I joined Tetra Tech to do.”
Victoria Brayshaw
Director and Head of Civil Engineering at Tetra Tech, CEng FICE Better Rivers Framework Director
The Benefits of an Integrated Approach
Combining traditional engineering with smart sewers and nature-based solutions offers numerous benefits. Most importantly, it enhances river health by reducing pollution and improving water quality, which in turn supports biodiversity and strengthens ecosystems.
Additionally, this integrated approach can lead to significant cost savings in the long run. By investing in smart technologies and natural solutions, water companies can reduce the need for expensive infrastructure projects and minimise the costs associated with pollution clean-up.
Finally, engaging communities in these initiatives fosters a deeper connection to local rivers. When people witness the positive impacts of these efforts, they are more likely to support and participate in conservation activities, creating a culture of environmental stewardship.
River Health: A Critical Juncture
The time for innovative solutions is now. By embracing an integrated approach that combines traditional engineering with smart sewer systems and nature-based solutions, we can create a more sustainable and resilient future for our waterways.
As we move forward into AMP8 and beyond, let us champion these strategies and ensure that our rivers remain vibrant and healthy for generations to come. Together, we can make a meaningful impact on the health of our rivers and the communities that depend on them.
Learn more about how Tetra Tech is championing innovative resilient sustainable solutions in river health for clients and communities nationwide.
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