The results of this study have allowed to verify that
longshore sediments transport along the coast of Napoli Gulf (southern Italy)
takes place from Northwest to Southeast. The current analysis describes the
results of an integrated sedimentological and geomorphological study of the
neapolitan coastal area.
A sedimentological and morphosedimentary study was carried
out by bathymetric survey and sampling of bottom sediments. The analysis of
modal isodensity curves shows that all the sediments are moved by longshore
currents parallel to the coastline from NW to SE.
The morphological evolution of Castellammare di Stabia Gulf
coastal area, based on historical coastline changes, starts from 1865, when the
sandy littoral was wide and in its natural state. Since the construction of the
Torre Annunziata harbour in 1871, sediments carried by a NW-SE longshore drift
have become trapped, inducing the genesis of a new wide triangular-shaped beach
on the updrift side (NW) of the harbour breakwall.
This process induced a significant shoreline retreat of the
littoral to SE, in the whole coastal physiographic unit of Castellammare di
Stabia Gulf (delimited by two ports), slightly marked in the southern portion.
We can note a slight rotation of the shoreline towards East and a general trend
for regression, with typical overall accentuation of shoreline concavity, and
significant widening of the triangular shaped-beaches at the end of the
falcate. This reduced sediment input removed from the sedimentary budget a
significant sediment share - hardly restorable due to the scarce solid contribution
by the Sarno river and its tributaries.
In addition to this new and important derived morphologic
feature, other recent human interventions have contributed to further
modifications of morphologic characteristics of emerged and submerged beach.
The intense use of the territory caused modifications on the fluvial course and
on the river mouth, with direct and indirect effects on the shoreline and the
hydrographical reticulum of Sarno River.
Author(s) Details:
Giuseppe Pecoraro,
Giunta
Regione Lombardia, Milano, Italy.
Micla
Pennetta,
Università
degli Studi di Napoli “Federico II”, Napoli, Italy.
Please see the link here: https://stm.bookpi.org/EIEGES-V6/article/view/13064
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