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

PDF (English)
Publiée : Jan 1, 2007
DOI : https://doi.org/10.12681/bgsg.17058
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
Résumé

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

Article Details
  • Rubrique
  • Physical Geography- Geomorphology
Creative Commons License

Ce travail est disponible sous licence Creative Commons Attribution - Pas d’Utilisation Commerciale 4.0 International.

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Téléchargements
Les données relatives au téléchargement ne sont pas encore disponibles.
Références
Anstrey R.L., 1965. Physical characteristics of alluvial fans. U.S. Army Natick Laboratories, Technical Report ES-20.
Armijo, R., Lyon-Caen, H.. and Papanastasiou, D., 1991. A possible normal-fault rupture for the 464 BC Sparta earthquake, Letters to nature, 351.
Bull W.B., 1977. The alluvial fan environment, Progress in physical Geography, 1, 222-270.
Gaki-Papanastasiou, K., Papanastasiou, D., and Maroukian, H., 1995. Geomorphological and seismotectonic observations in the area of Sparta. Proc. 4th Panhellenic Geogr. Conf, 1998.
Eliet, P.P,. and Gawthorpe, 1995. Drainage development and sediment supply within rifts, examples from the Sperchios basin, central Greece, Journal of the Geological Society, London, 152,883-893.
Harvey, Α., 1997. The role of alluvial fans in arid zone fluvial systems, John Wiley & Sons Ltd, New York, U.S.A.
Harvey, Α., 2002. The role of base-level change in the dissection of alluvial fans: case studies from southeast Spain and Nevada, Geomorpholog,y 45, 67-87.
Hooke, R.L., 1965. Alluvial fans. Ph. D. Dissertation, Institute of Technology, California. University Microfilms, Michigan, U.S.A.
Lecce, S.A., 1988: The alluvial fan problem, Arisona State University, Tempe, Arisona, U.S.A. Mariolakos, I., 1976. Thoughts and view points problems of the geology and tectonics of Peloponnesus (Greece), Ann Geol. Pays Hellen., 27, 215-313.
Maroukian, H.S., 1975. A morphometric analysis of selected alluvial fans in the basin and range province, Master's thesis, Louisiana State University, U.S.A. (unpublished)
Maroukian, H.S., 1987: Physico-geographic observations in the drainage basin of Sperchios river, Ph. D. Dissertation, University of Athens. (In Greek).
Maroukian, H., Papanastasiou, D., and Gaki-Papanastasiou, K., 1999. Paleogeographic evolution and seismotectonic implications of the broader area of Eurotas river (Greece) during the Quaternary, Ζ Geomorph. N.E., 118, 135-146.
Moore, T.E., and Nilsen, T.H., 1984. Bibliography of Alluvial fan deposits, Geo Books, Norwich, England.
Papanikolaou, D., 1986. Geology of Greece, Athens, 240p. (in Greek).
Papanastasiou, D., Gaki-Papanastasiou, K., Maroukian, H., Karympalis, E., and Makaris, D., 2000. Implications of morphology and seismicity on the hazard assessment in the monuments of Mystras in Southern Peloponnesus, Greece, Ann Geol. Pays Hellen., 38, 157-173.
Papanastasiou, D., Gaki-Papanastasiou, K., and Maroukian, H., 2005. Recognition of past earthquakes along the Sparta fault (Peloponnesus, southern Greece) during the Holocene, by combining results of different dating techniques, Journal of Geodynamics, 40, 189-199.
Pope, R., and Millington, Α., 2002. The role of alluvial fans in mountainous and lowland drainage systems: examples from the Sparta basin, Lakonia, southern Greece, Z. Geomorph. N.F. 46 (1), 109-136.
Pope, R., Wilkinson, K., and Millington, Α., 2003. Human and Climatic Impact on Late Quaternary Deposition in the Sparta Basin Piedmont: Evidence from Alluvial Fan Systems, Geoarchaeology.An International Journal, 18, (7), 685-724.
Rachochi, A.H., 1981. Alluvial fans, John Wiley and sons, New York, U.S.A.
Volker, H.X., Wasklewicz, T.A., and Ellis, M.A., 2006. A topographic fingerprint to distinguish alluvial fan formative processes, Geomorphology, (in press)
Articles les plus lus par le même auteur ou la même autrice