A Flood Alert was issued for Groundwater flooding in Vernham Dean, Upton and the Bourne Valley in Hampshire on 3rd March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Everleigh rose 0.90m, peaking at 131.61m, while the Groundwater Level at Clarendon climbed 0.47m.
Environment Agency advice issued
Groundwater levels in the Bourne Valley are high. At the borehole in Vernham Dean, the level peaked on Wednesday 25/02/2026, and has since fallen by 29cm. In Upton, levels are high but steady. Flooding is expected to be affecting a small number of cellars in Upton. Septic tanks will also be struggling to operate properly. Currently, we do not expect impacts to property at Vernham Dean, Hurstbourne Tarrant, Stoke or St Mary Bourne to be occurring. From Tuesday 03/03/2026 to Saturday 07/03/2026, mostly dry weather is expected. Groundwater levels will continue to slowly fall over the next week. W
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Everleigh | Groundwater Level | +0.90m | 131.61m |
| Clarendon | Groundwater Level | +0.47m | 73.70m |
| Queen Manor Farm | Groundwater Level | +0.22m | 70.84m |
| Hazelberry Plantation | Groundwater Level | +0.19m | 126.77m |
| Chapel Wood | Groundwater Level | +0.15m | 111.47m |
| Water Acre | Groundwater Level | +0.11m | 143.98m |