If you have just scanned a QR code looking like this, congratulations! You’ve discovered one of around 100 leaky woody dams that Thames21 has built with local volunteers at five locations in London.
These are part of a scheme to reduce flood risk through natural flood management (NFM). Read more.
You can join our team of Slow Flow Catcher citizen scientists using the Cartographer App to record data about the dams themselves and the water being held back (slowed) by them. See the following documents to find out how and to sign up.
Leaflet introducing key principles of natural flood management
Useful terminology and flood hydrograph diagram
How to get started as a Slow Flow Catcher
FAQs to support filling out a Slow Flow Catcher survey