Just this morning, the Welney Causeway was shut down for the third time this winter – this may well be an all-time record. As road closures due to flooding of the Ouse Washes affect local communities directly, I thought to get this message out quickly.
This winter has seen a particular high number of days in which the roads crossing the Ouse Washes have been closed off due to flooding. See my previous post on an earlier road closure this winter which turned out to be the second longest in history.
When the Ouse Washes are flooded above a certain level, the road crossings at Welney and Earith will have to be shut down. The Welney Causeway was shut this morning, following a ‘severe’ flood warning. The Earith crossing currently has a ‘medium’ flood warning; according to the latest news from the Environment Agency the Earith causeway is still open. Check here for the latest updates.
To the right is an image of the current situation at Welney, as of 5:30 this morning. See here for more information, or see here for similar images for up-to-date information on other river level measuring points further south along the Ouse Washes (at Welches Dam and Sutton Ghault).
So, why do we get flooding in the Ouse Washes? The main reason is that – in times of high rainfall further inland – the water in the Great Ouse river rises. Once it reaches a certain level at Earith, water is automatically diverted and allowed to flow into the Old Bedford river, Vermuyden’s early seventeenth century masterpiece. From here, the washes in between the Old and New Bedford rivers are flooded. This prevents flooding of towns and huge stretches of agricultural land elsewhere.
More about how all of this works and the decision-making processes behind all of this in due course. For now, click on the below Environment Agency map to get a first idea of how the whole Ouse Washes water flow system works – it is rather complicated but also quite ingenious:
- The End of Flooding? (ousewasheslps.wordpress.com)