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FIGURE 8 4VKPÄLKMYVT-PN\YLVMSPJLUJL,7(
FIGURE 9 Posidonia oceanica wrack on a pocket beach of Favignana In the present study, we describe a multipurpose
Material and methods
The first action of the project has been the analysis of
the public environmental awareness, carried out in
order to investigate if and how tourists could tolerate
the presence of marine plants laying on the beaches
of Favignana Island. Then, a procedure has been
implemented in order to remove all the waste that may
be present on the beach.
Afterwards,the recover and the use of vegetal biomasses
has been carried out for:
1. beach restoration and improvement of the beach
access;
2. compost production;
3. restoration of the meadows and the seabed showing
signs of regression of Posidonia (due, for example,
to the anchors or the illegal trawling at the coast).
86 EAI Energia, Ambiente e Innovazione 4/2015
facility, designed and built with beached biomasses
covered by a casing made with biocompatible
fibre padding and with biomass harvested from the
beaches.
In Figure 10, three different steps of preparation
of the structures are clearly illustrated. A first
use of the structure is “in situ”. On stretches of
rocky coast adjacent to the point of collection, the
“mattress” can be arranged in order to obtain an
area useful for bathing and tourist recreation and
to overcome those rocky outcrops that otherwise
do not allow to take advantage of sharp and rough
surfaces.
A second use, is to dive the structure, preferably below
the closure depth (Figure 11), which can be calculated
by using Hellermeier’s equation [20] e [21].
Results
According to the study of ENEA, carried out in the
summers of 2012 and 2013 through the distribution
of a questionnaire and the appropriate data analysis,
about 60% of the tourists visiting the Egadi Islands
knows the ecological importance of the Posidonia
seagrass. Nevertheless, for 33% of the tourists the
beached debris of the seagrass represents a problem:
they associate this debris to inconveniences related