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hull night  flood barrier | by siandara
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hull night flood barrier

Environment Agency officers have used the Hull barrier to help water drain from the River Hull and east Yorkshire’s floodplains by keeping back the tide.


Officers used the tidal surge barrier at midnight last night until 8am this morning to stop tidal flows from entering the Hull river system.


The aim was to speed up the discharge of water from the middle stretches of the river, upstream of Hull and north of Beverley where the levels were high. Staff lowered the barrier to prevent the tide from flowing upstream and taking up space in the river system.


Once the tide had turned and levels either side of the barrier had equalised, the barrier was lifted to allow the river water to flow out.


The barrier is normally used to prevent tidal surges from flooding the city and is used on average between eight and 12 times a year.


It’s planned to use the barrier again this afternoon until 9pm tonight, after consultation with shipping interests to make sure that they are able to make the barge movements they need to. Over the next few days we will keep an eye on water levels and decide whether to deploy the barrier again


The Environment Agency’s Jan Davie said: “By using the tidal barrier, we can keep the tide from going up river. This creates more space in the lower parts of the river system so that the water from upstream can flow down into it. We hope to drop the barrier again later today to repeat the effect and get as much water as possible out of the river Hull and away into the Humber.”


”We’re working closely with the shipping companies to make sure they can do what they need to do before we deploy the barrier again.”


The system works by keeping tidal water out of the lower part of the River Hull - the stretch which meets the estuary. If tidal water is kept out then there is more room for the river water to drain into it until the barrier is lifted again.


When the barrier is kept open under normal circumstances, the tide moves up the River Hull and prevents upper river water from flowing to the estuary.


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Taken on October 21, 2008