A Flood Alert was issued for Groundwater flooding in upper River Ems Valley in West Sussex on 6th March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Hermitage Stream at Havant rose 0.09m, peaking at 5.33m, while the River Lavant at West Street climbed 0.09m.
Environment Agency advice issued
Groundwater is high, very close to the surface, but slowly falling at the Compton borehole. Springs will continue to appear, water will be in fields, and water will flow down roads, including Stoughton main road, the road from East Marden, between Cooks Lane and Barley Mow in Walderton, and the B2146 near Woodlands Lane. Groundwater will also affect a small number of cellars in Stoughton and Walderton. Only small amounts of rain are forecast over the five days to 10/03/2026, and groundwater at Compton borehole will continue to slowly fall over the coming week. There is a suggestion that unsett
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Havant | Hermitage Stream | +0.09m | 5.33m |
| West Street | River Lavant | +0.09m | 7.21m |
| Chichester Tozer Way | River Lavant | +0.06m | 13.41m |