depictions of two physical structures

From 07 March – 04 April 2022, we are running a short survey (~10 min to complete) aimed at people across the globe who are working or volunteering (of all career stages) in academia, government, non-government, or consultancy who hold knowledge about the hydroecology of smaller physical structures (i.e., structures other than dams), particularly about the passability for fishes. Questions about the survey can be directed to Steph Januchowski-Hartley s.r.januchowski (at)