A Flood Alert was issued for Groundwater flooding in Denmead in Hampshire on 11th March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Hermitage Stream at Havant rose 0.08m, peaking at 5.28m, while the River Lavant at West Street climbed 0.06m.
Environment Agency advice issued
Groundwater levels in Denmead are high but slowly falling. At the borehole at Rookwood Farm, the level has fallen by 70cm in the last week. Water is expected to be affecting Anmore Road and Mill Close. High groundwater levels could affect the sewage network from operating as effectively. On Thursday 12/03/2026 into Friday 13/03/2026, between 15 and 20mm of rain is forecast to affect Hampshire. Drier weather is expected over the weekend. If heavy rain affects Denmead, ongoing flooding impacts will be prolonged. We are closely monitoring the situation. Residents are advised to prepare property r
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Havant | Hermitage Stream | +0.08m | 5.28m |
| West Street | River Lavant | +0.06m | 7.11m |