@proceedings {17688,
	title = {Geomorphological and sedimentological dynamic processes at the semi-closed Bay Platis Gialos (Sifnos Island)},
	journal = {15th International Congress of the Geological Society of Greece},
	year = {2019},
	address = {Athens - Greece},
	abstract = {<div>Platis Gialos Bay located at the Southern part of Sifnos Isl. and his length is determined at 1.000 m, with SE direction.\&nbsp;The coast of Platis Gialos Sifnos has been under erosion and permanent coastal retreat for several years, especially at the\&nbsp;central and west part of the beach. The main causes of coastal erosion are anthropogenic.This paper focuses most intently on the geomorphological and sedimentological dynamic processes of the Bay which\&nbsp;forming the current situation. For this reason a number of tasks took place in order to determine the level of disturbances\&nbsp;of this dynamic equilibrium. This study included two phases of survey for two different periods (summer/winter). The\&nbsp;first phase deals with the geomorphological and sedimentological coast characteristics, and includes: i) long-term\&nbsp;geomorphological evolution of the coastal zone through the analysis of satellite images (Google Earth), in order to\&nbsp;estimate the intensity of coastal erosion. ii) topographic sections at the surface of the coastal zone, through D-GPS (Spectra\&nbsp;Precision SP80 GNSS Receiver), perpendicular to the coastline, iii) sediment sampling in the subaerial coastal area, iv)</div>
<div>analytical recording and mapping of the summer and winter shorelines via the D-GPS, v) the situation of the potential\&nbsp;feeders of the shore with materials, necessary for the formation of an alluvial beach, and vi) recording of land uses (Fig.1).\&nbsp;The second phase, includes the geomorphological and sedimentological characteristics of the marine area, in particular:\&nbsp;i) topographic sections of the bottom surface until the depth of 1.5 m, through D-GPS, perpendicular to the coastline ii)sediment sampling in the subaquatic marine area, iii) data of the numerical recomposition of the wind and wave conditions\&nbsp;of the study area, iv) bathymetric eco-sonar data (Lowrance LCX-15MT), v) side-scan single beam eco-sounder (StarFish\&nbsp;450), to determine the seabed morphological features of the bay and, vi) substrate component mapping (Fig. 1).\&nbsp;Laboratory analyzes were followed by the methods of dry granulometry, in order to categorize it, in different types on the\&nbsp;basis of Folk \&amp; Ward (1957) method through GRATISTAT (v.8) software.</div>},
	author = {Petropoulos, A. and Kapsimalis, V. and Evelpidou, N. and Anagnostou, Ch.}
}
