3540mm rain in 24 hours 3000 people evacuated Army called in to help Ouse 48m above normal levels 80000 sandbags used York race course flooded no races Average insurance payout 25000 per property ID: 558540
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York floods November 200035-40mm rain in 24 hours3000 people evacuated, Army called in to helpOuse 4.8m above normal levels80,000 sandbags used
York race course flooded – no racesAverage insurance payout - £25,000 per property£1.3m in costs for sandbags, fire, Army£10m in lost income – 200,000 fewer visitorsSlide4
York
R. Ouse is fed by Swale, Nidd & Ure.
Flooding can occur quickly.
R. Foss meets the Ouse in York.Slide5Slide6Slide7
A
B
When the river is in
flood a sluice gate is opened at Point A.
Water then flows into the Ings which is surrounded by a large embankment. It is stored here, like a reservoir, until the river level falls.
When the river level falls, water is let back into the river via a sluice gate at point B.Slide8
2.3m cubic metres – lowering flood levels by 150mm
Cost £1.25m in 1982
River OuseSlide9Slide10
Floodbank constructed in front of houses & sewage system improved in 1980.
Floodbanks raised in 1982 after wind blew waves from Clifton Ings.Slide11
Built in 1982 .Concrete flood walls with strengthened steel centres have been constructed to protect against powerful flood water.
Natural looking embankments also constructed.Valves installed to isolate sewage during flood periods.
Lower Ebor StreetSlide12Slide13
Holgate Beck diverted so discharge flows into the River Ouse downstream of York.Upstream of York where the Beck meets the Ouse, a two-pump station was built to control water levels.
Holgate BeckSlide14
Marygate Flood Walls
A wall of waterproof bricksSlide15
Lendal BridgeSlide16
Museum GardensSlide17
The Museum Gardens has an embankment in it. This increases the volume of the river channel and also acts as a barrier to flood water.
Any rabbits or vermin in the flood wall are killed by pest control. Slide18
The Kings Arms Pub
Many buildings have to adapt to the floods. The most famous building for flooding is the Kings
Arms
pub.Slide19
Beer is kept upstairs instead of in a
cellar – electrics are at roof height.The pub has stone floors.
There is a second entrance up the street.The bar can be taken down & moved upstairs in less than two hours.Slide20
River Ouse flows south, carrying more water than the Foss
The Foss often carries less water than the Ouse
The Ouse spills into the Foss, causing the Foss to floodSlide21
Why is there a Barrier?
What potential problems can you think of with this Barrier?Slide22
The Foss Barrier is lowered stopping the Ouse flowing into the Foss.
The Foss is then pumped into the Ouse by 8 pumps.
30tonnes per second
Made from natural materials (sandstone) to blend in.
Cost £3.34mSlide23