| More

A contribution to environmental research of the Korissia coastal wetland (Corfu isl., Greece), with the application of combined geological and geophysical methods supported by Geographic Information Systems

Views: 102 Downloads: 60
J. D. Alexopoulos, V. Tomara, Em. Vassilakis, T. D. Papadopoulos, M. Dassenakis, S. Poulos, N. Voulgaris, S. Dilalos, G. Ghionis, G. Goumas, E. Pirlis
J. D. Alexopoulos, V. Tomara, Em. Vassilakis, T. D. Papadopoulos, M. Dassenakis, S. Poulos, N. Voulgaris, S. Dilalos, G. Ghionis, G. Goumas, E. Pirlis

Abstract


In the current paper are presented the results of a multidisciplinary study (stratigraphical, sedimentological, geophysical and geochemical) combined with modern techniques (G.I.S. and remote sensing). This study aims at integrating the natural and anthropogenic factors affecting the Korissia lagoon. It is a shallow coastal lagoon, communicating with the sea via an artificial channel. The area around the lagoon consists of alluvial sediments hosting, in places, newly formed and/or "old" (pre - Holocene) sand-dunes. The broader area constitutes a postalpine sedimentary basin characterised by smooth morphological relief. The lower stratigraphie unit of the post-alpine sequence is a Pleistocene marly formation, which was detected as the basement (5-15 Ohm.m) by the geophysical survey. The resistivity-based basement map implies the existence of a "palaeo-gulf" trending EW. These marls constitute the impermeable basement of a shallow aquifer hosted in the area. The salinity of the lagoon is very high during summer (>40psu) but it does not affect significantly the wells around it. The lagoon is well oxygenated, while the wells have lower D.O. values. Ammonia and nitrates are the main inorganic Nitrogen forms, in the lagoon and the wells, respectively. Phosphorus is the limiting factor for phytoplankton growth. Human activities affect the area that is in need of an environmental management plan in order to prevent ecological degradation


Keywords


Lagoon; Geomorphology; Geophysics; Stratigraphy; Geochemistry; G.I.S.

Full Text:

PDF

References


Aubouin, J., 1959. Contribution a Γ etude géologique de la Grece septentionale, les confins de l’

Epire et de la Thessalie, Ann. Geol. Pays Hell, 10, 526.

Diamantopoulou, E., Dassenakis, M., Kastritis, Α., Tomara, V., and Paraskevopoulou, V., 2006. Nitrogen and phosphorous in a shallow Mediterranean lagoon, 2nd International Conference AQUA 2006, Water Science and Technology, Integrated Management of Water Resources, November 2006, Athens, Greece.

Folk, R.L., 1974. Petrology of Sedimentary Rocks, Hemphill Publishing Company, Austin, Texas, 183pp.

Grasshoff, Κ., Kremling, Κ., and Ehrhardt, M, 1999. Methods of seawater analysis, Wiley VCH, 159-226.

Jacobshagen, V., 1986. Geologie von Griechenland. Beitr. ζ. region, Geol. d. Erde, 363pp.

Karidis, M., Ignatiades, L., Mouriki, Α., Tsirtsis, G., and Kitsiou, D., 1988. Quantitative assessment of eutrophication: Criteria development for the management of coastal waters, Scientific Report, University of Aegean, Mitilini-Lesvos.

Ladakis, M., Belias, C, Salta, F., Dassenakis, M., and Skoullos, M., 2003. An effective oxidation method for the simultaneous determination of nitrogen and phosphorous in marine sediments, International Conference: Instrumental Methods of Analysis, Modern trends and Applications, 23-27/9/2003, Thessaloniki, Greece.

Ladakis, M., 2006. Study of certain modern coastal organosedimentary forms, PhD Thesis, University of Athens, 127-135pp.

Leontaris, S., 1976. Sur la provenance et l'évolution des dunes de Corfu du Sud et sur leur relation avec le lac de Corission, Praktika tes Akadimias Athinon, 1976: 522-539. (in Greek)

Marangoudakis, Ν., 1967. Geology and micropalaeontology of southern Corfu, Geological Geophysical Res., Inst. Geology Subsurface Research Athens, ν.12(1): 132p.,21 pis.

Papanikolaou, D., 1997. The tectonostratigraphic terranes of the Hellenides, Ann. Geol. de Pays Hell., 37, 495-514.

Petihakis, G., Triantafylloou, G., Koutsoubas, D., Allen, I., and Dounas, C, 1999. Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece).

Scoullos, M, Dassenakis, M., and Zeri, C, 1996, Trace metal behaviour during the summer in a stratified Mediterranean system: The Louros Estuary (Greece), Water, Air and Soil Pollution , 88, 269-295.

Tomara, V., Dasenakis, M., Paraskevopoulou, V., and Voulgaris, N., 2005. Geoenvironmental study of the Korissia Lagoon (Corfu), 9th International Conference on Environmental Science and Technology (9th C.E.S.T.), Rhodes Island, Greece, A, P. 1459-1464.

Tomara, V., 2006. Geoenviromental research of the Korissia Lagoon, supported by Geographic Information Systems, Msc Thesis, N.K.U.A., Faculty of Geology and Geoenvironment, 189pp.

Rögl, F., Antl-Weiser, W., Brandstätter, F., Dermitzakis, M.D., Papesch, W., Piller, W.E., Schultz, Ο., Symeonidis, N.K., Triantaphyllou, M.V., Tsarpalis, V., 1997. Late Pleistocene marine circles in Southern Corfu, Ann. Geol. de Pays Hell., 37', 667-715.

Zohdy, A.A.R., 1989. A new method for the automatic interpretation of Schlumberger and Wenner soundings curves, Geophysics, 54(2), 245-253.


Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 J. D. Alexopoulos, V. Tomara, Em. Vassilakis, T. D. Papadopoulos, M. Dassenakis, S. Poulos, N. Voulgaris, S. Dilalos, G. Ghionis, G. Goumas, E. Pirlis

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.