Environment Agency scientists are drawing up plans to deal with the impacts of climate change on Fenland's main artery.
Problems posed by changing weather patterns and siltation were unveiled in a new discussion paper, during open days at Denver Sluice.
Pike anglers in the Fens wonder whether restoring Denver Sluice will mean an end to the harsh flows and fluctuating levels scientists believe have led to poor spawning years for pike and prey fish being swept out to sea by heavy flows in the Relief Channel.
Click here for a newspaper report by Chris Bishop.