Comparative geomorphological observations in two groups of alluvial fans of Sperchios and Eurotas regions, Greece

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Published: Jan 1, 2007
DOI: https://doi.org/10.12681/bgsg.17058
Keywords:
drainage networks crenulations gravelometry
A. Kontou
National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Department of Geography-Climatology
K. Gaki-Papanastasiou
National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Department of Geography-Climatology
H. Maroukian
National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Department of Geography-Climatology
Abstract

In the present study two groups of alluvial fans from two different regions in Greece were comparetively studied, the first in the region of Sperchios river and the second in the region ofEurotas river. Distinct morphometric characteristics of the drainage basins of the tributaries Ts er lias, Xerias, Gorgopotamos, Kerasias, Retsas and Kakaris, as well as their fans were measured and compared. Furthermore ,the longitudinal stream profiles were mapped, pebble measurements were made and contour crenulations of the fans were studied. In gravelometry, it was found that the mean size M of the pebbles decreases from the apex to the apron of the fan. The crenulation analysis showed that the fans of the streams ofEurotas region have undergone greater erosion than those of Sperchios region. Remarkable differences exist between the fans of the two regions. These results lead to the conclusion that recent tectonism, the prevailing lithology and climate are responsible for the formation and evolution of the fans and also influence their shape, area and all the other morphometric characteristics

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  • Physical Geography- Geomorphology
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