Discover the Hidden World of Norwich's Chalk Rivers

Nick Acheson is talking about Norfolk's chalk rivers at City Hall on Monday 26 October, from 6.00pm to 7.30pm. It's a free event, though you'll need to book your place in advance.

Most of us know the River Wensum as one of the main watercourses running through the city, but it's actually one of Norfolk's rare chalk rivers. These are a particular kind of river, filtered through chalky soil, and they support a distinct kind of wildlife. Acheson will be opening up that hidden world, drawing on his experience as a naturalist, author and broadcaster to talk through what makes them so special and what lives in them.

He's an ambassador for Norfolk Wildlife Trust and wrote The Meaning of Geese, which picked up an award, so he's well-versed in the county's natural history. The session is facilitated by the Trust, and he'll be joined by Elle Claiborn, Senior Citizen Science Officer at Norfolk Rivers Trust, who will give a short presentation on why citizen science monitoring is so important for the future of these watercourses. If you've ever wondered what's actually happening in the rivers that flow through the county, it's a good chance to hear it from people who spend their working lives looking at them.

It's held in the Council Chambers at City Hall, St Peter's Street, NR2 1NH. The talk runs from 6.00pm to 7.30pm on Monday 26 October, and while it's free, you do need to book your spot.