Twice a year we run Big River Watch weeks. where we invite you to take part in a simple citizen science activity that helps build a picture of river health across the UK and Ireland.

• Download the free Big River Watch app on your smartphone before visiting your chosen river.

• Pick a riverside location, spend 15 minutes observing, and answer the questions in the survey. You can complete the Big River Watch at your favourite local spot, or get to know somewhere new.

• Upload your Big River Watch survey. It’s that simple to get involved!