AERO-DEFLECTOR SAND DUNE
Implementation study on the Ocata beach (El Masnou - Catalonia)
Fig.1. Sand angle of stability (7-11-2009)
Experiments indicate that the siliceous sand of the Ocata beach has an
internal friction angle of around 32 °. This is the angle of the slope stability created with this sand.
The experiment shows a handful of sand 20 cm high on one of the wooden
walkways of the beach. But we could make a 6 meter high dune, with the same angle
a sand bar 180 meters long and 6 meters tall, facing the laminar sea
wind, it would create locally a very smooth upward flow,
which would allow the paragliders (and "floater" hanggliders) with
expert pilots, to keep them flying over for hours, playing with the
wind, sand, and sea ... The utility would not be another, except
constitute the balcony to the sea, carrying a few kilometers beyond the
horizon the tangent of the visual curvature of the earth...
Fig. 2. Section type of the aero-deflector sand dune
Fig. 3. Tridimensional model
Fig. 4. Dune planform view, embedded in a beach sector between streams.
Fig 5. Aerial view of the aero-deflector dune in the central section of the Ocata beach.
Would allow the flight on a small height between SE and SW winds over 15 km/h.
Location: 41°28'45.41"N 2°19'26.82"E
The section of the dune, 6 m high and 22 meters base, is 76 m2. It has
three axes corresponding to the wind main
components of the south (182m), east (55m) and west (76m). The
volume of sand needed to create the dune is approximately 18000 m3.
The task can be performed quickly with conventional earth-moving
machinery, and the sand would result in lowering
of -0.5 m (negligible) the adjacent sections of beaches. The dune is
approached as a temporary action, restoring the geometry of the beach
before the summer season.
See also: Inflatable and transportable dune.