A Flood Alert was issued for Groundwater flooding in Denton in East Sussex on 23rd February 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Ouse at Barcombe rose 0.78m, peaking at 3.72m, while the River Ouse at Anchor Gates climbed 0.30m.
Environment Agency advice issued
Groundwater is high, close to the surface, but slowly rising again at the Houndean Bottom borehole. Springs will appear, water will affect fields, the recreation ground, and a small number of cellars in Denton. Only isolated showers are forecast Monday to Wednesday 25/02/2026. Groundwater should continue to fall over the next few days. On Thursday 26/02/2026 a weather front is forecast to bring widespread rainfall. There is uncertainty in rainfall amounts, and predictions may change, but it is probable that groundwater at Houndean Bottom borehole will rise again from Friday 27/02/2026 through
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Barcombe | River Ouse | +0.78m | 3.72m |
| Anchor Gates | River Ouse | +0.30m | 6.13m |