Fig. 4: Comparison of total discharge rates.
From: A system for in-situ, wave-by-wave measurements of the speed and volume of coastal overtopping
a) total discharge q (l s−1 m−1) data from the collection tanks on the x-axis, and from the two WireWall (WW) units (red triangles) for the long, 1000+ wave runs in the flume (see Table 2 in Methods). The results are scaled up to show real-world values. The black line indicates 1:1 agreement and the dotted lines indicate the + /−40% uncertainty estimated for the tank data. Also shown are the Bayonet GPE predictions (blue stars), with the error bars indicating + /−1 s.d. uncertainty. b) as a) but with a linear y-axis scale to show the tank and WireWall comparison in more detail. c) the same discharge data but displayed against real-world Still Water Level (SWL, m ODN) with the tank data shown as green squares. d) as c) but non-dimensionalised, where Rc is the freeboard (promenade height 7.2 m - SWL), Hmo,t is the significant wave height at the toe of the structure and g is acceleration due to gravity. Note that the WireWall systems were only deployed for some of the 1000+ wave runs. These data are available from the British Oceanographic Data Centre (https://doi.org/10.5285/acd939f0-38e8-57b0-e053-6c86abc0aa19).
