A Flood Alert was issued for Groundwater flooding in Denton in East Sussex on 27th February 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Bull at Hellingly rose 0.41m, peaking at 1.20m, while the River Ouse at Barcombe climbed 0.29m.
Environment Agency advice issued
Groundwater is high, close to the surface, but slowly rising again at the Houndean Bottom borehole. Springs will continue to appear, water could affect fields, the recreation ground, and a small number of cellars in Denton. Only small amounts of rain are forecast over the five days to 03/03/2026, and it is probable that groundwater at Houndean Bottom borehole will continue to slowly fall over the coming week. There is a suggestion that high pressure, settled conditions, and only small amounts of rain could continue in the south east of England through the first half of March 2026. Which would
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Hellingly | River Bull | +0.41m | 1.20m |
| Barcombe | River Ouse | +0.29m | 3.18m |
| Anchor Gates | River Ouse | +0.28m | 6.03m |
| Bell Lane Grill | Winterbourne Stream | +0.06m | 5.14m |
| Barcombe Gates | River Ouse | +0.05m | 5.52m |