where the difference between the initial and actual bed level is read from a centimeter scale on the PVC sticks based on the camera recordings gave reasonable
accuracy (±0.5 cm).
3.4.2 Velocity, Force and Scour Regimes
Velocity measurements are accomplished to investigate the velocity regime in the
vicinity of the OWEC-structure and its deviations by means of a fish cage installed
inside the tripile legs. Foremostly, this part of the experimental program was
intended to learn how velocities range inside the fish cage under wave attack in
order to allow marine biologists to evaluate if fish production is feasible at all and
how strong velocities influence the natural behavior of potential marine species
Fig. 3.11 a Schematic of the OWEC and cage arrangement. b Tripile model with cylindrical fish
cage, c tripile model with spherical fish cage, and d longitudinal section of the wave flume with
wave maker, position of wave gauges, sand pit and tripile model
3 Technological Approaches to Longline- and Cage-Based …
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accuracy (±0.5 cm).
3.4.2 Velocity, Force and Scour Regimes
Velocity measurements are accomplished to investigate the velocity regime in the
vicinity of the OWEC-structure and its deviations by means of a fish cage installed
inside the tripile legs. Foremostly, this part of the experimental program was
intended to learn how velocities range inside the fish cage under wave attack in
order to allow marine biologists to evaluate if fish production is feasible at all and
how strong velocities influence the natural behavior of potential marine species
Fig. 3.11 a Schematic of the OWEC and cage arrangement. b Tripile model with cylindrical fish
cage, c tripile model with spherical fish cage, and d longitudinal section of the wave flume with
wave maker, position of wave gauges, sand pit and tripile model
3 Technological Approaches to Longline- and Cage-Based …
87