A Flood Alert was issued for Groundwater flooding in the Lambourn Valley catchment in Oxfordshire, West Berkshire on 7th April 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Hazelberry Plantation rose 0.38m, peaking at 124.04m, while the Groundwater Level at Water Acre climbed 0.33m.
Environment Agency advice issued
Continued high groundwater levels may lead to flooding. Flooding is possible. Groundwater levels are falling slowly at our Longacre borehole in the Lambourne Valley. We expect levels to fall over the next few weeks in response to a forecasted period of more settled weather. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are closely monitoring rainfall and groundwater levels. Residents are advised to consider property resilience measures and ensure that pumps are working where they have been installed. Keep up to date with groundwater le
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Hazelberry Plantation | Groundwater Level | +0.38m | 124.04m |
| Water Acre | Groundwater Level | +0.33m | 141.30m |
| Draycot Foliat | Groundwater Level | +0.32m | 155.36m |
| Longacre | Groundwater Level | +0.26m | 142.14m |
| Eastbury Flood Control Structure | River Lambourn | +0.07m | 1.15m |