An innovative South West project is using data and mapping technology to identify areas most at risk of groundwater infiltration, helping make water and wastewater infrastructure more resilient to climate change.
A project led by South West Water in partnership with the University of Exeter through the Centre for Resilience in Environment, Water and Waste (CREWW) has entered its second phase following the success of an initial pilot study. The Groundwater Infiltration Risk Mapping Project aims to improve the resilience of water and wastewater systems in the face of climate change and ageing infrastructure.
Groundwater infiltration occurs when groundwater enters sewer systems through cracks or damaged connections. This can increase treatment costs, raise carbon emissions associated with wastewater processing, and increase the risk of flooding and pollution incidents.
Using geospatial technology, groundwater modelling and data-driven mapping, the project is identifying locations where infiltration is most likely to occur, allowing resources and maintenance activity to be targeted more effectively. By understanding risks before problems arise, water companies can take proactive action to improve resilience and reduce disruption.
Phase one of the project focused on the Lower Otter catchment and produced a detailed risk map highlighting areas requiring attention. Following the success of the pilot, phase two will expand the approach to Dawlish and Camborne, with work continuing until October 2026.
The resulting models will help inform future maintenance programmes, drinking water resource management and long-term infrastructure planning. As climate change brings more extreme weather and increasing pressure on water systems, projects such as this can help ensure essential infrastructure is better prepared for future conditions.
By combining research, innovation and practical planning, the project demonstrates how data and technology can support climate adaptation across Devon, Cornwall and the Isles of Scilly, helping communities and critical infrastructure become more resilient to future risks.
Read more on the South West Water website.
How is this helping DCIoS Adapt to Climate Change?
Action INFB 1: Develop joint strategies, research, and longer-term schemes with South West Water, Lead Local Flood Authority, and catchment partnerships to improve catchment management both for high flow areas at flood risk and protect low flow by reducing demand / drought impacts.
Action NEA 1: Develop a collaborative regional water strategy to manage water availability and safe treatment and disposal of waste water, including aquifer recharge, control over-extraction, increase the use of rainwater harvesting, reduce effluent discharge etc.
