Selected video footage from Hydralab IV wave flume experiment to investigate wave dissipation over salt marshes during storm surges. The experiment is described in: http://www.cam.ac.uk/research/news/salt-marsh-plants-key-to-reducing-coastal-erosion-and-flooding and the publication: http://www.nature.com/ngeo/journal/v7/n10/full/ngeo2251.html