Slipper Mill Pond Preservation Association
Registered Charity No:277744

 Flooding

green - tidal risk zone  blue - river flooding risk www.environment-agency.gov.uk

"Any flooding around the pond is purely due to the tide".

Photo thanks to John Brown

This positive statement saying that flooding is independent of the management of the pond gates and sluice can only be made after much research and considering all the evidence.

1.Environment Agency
Their 'flooding risk' map of the area shows that the land flanking the river and the pond is classified as being in the tidal risk area.

The following links lead to their advice:

• Responsibilities
• Mills and Weirs
• Flooding

2. Local Construction Limit

• Havant Borough Council defines the 'safe' level  as 4.03m above Ordnance Datum for Emsworth.  
• Technical details including wave heights are available

3. Burgess Report
The SMPPA commissioned John Burgess, a Hydraulic Engineer, to investigate the problems experienced in the Spring of 2001 when there was flooding due both to high tides and the river in spate.  His investigations revealed that the flooding experienced at the Lumley Cottages was due to the volume of water flowing in the stream in front of them, and  was independent of the Pond management regime.

Notes circulated by John Burgess at his presentation to the SMPPA - September 2002

Pictures

taken at the exceptional high tide at the time of the investigation in March 2001 by SMPPA

South sea wall

West sea wall submerged

Lumley Road

Brook Meadow upper field looking towards Lumley Road Note standing water

Gooseberry footpath bridge

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