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| Titel |
Mapping erosion and deposition rate changes along the Axios-Aliakmonas rivers Delta, North Greece based on Landsat TM imagery analysis |
| VerfasserIn |
G. Petropoulos, D. Kalivas, P. Dimou |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250067688
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| Zusammenfassung |
| Coastlines movement mapping due to erosion and deposition is a topic of major concern in
coastal zone management. Coastlines with very dynamic characteristics can potentially cause
significant hazards to human activities and settlements. Remote sensing, with its repetitive
acquisition and synoptic capability combined with Geographical Information Systems (GIS),
has shown a promising potential in detecting and monitoring coastlines movement over large
areas.
Axios and Aliakmonas rivers, located in Northern Greece, are two of the largest rivers of
the country, being recognised as extremely rich and fertile ecosystems. The rivers Deltas in
particular, due to their highly dynamic nature, provide a very good case to evaluate the
potential capability of a range of image processing algorithms applied to multispectral data
for monitoring coastline changes.
The objective of our work had been to evaluate the exploitation of a range of image
processing techniques when combined with Landsat TM imagery for mapping the coastline
movement of the Axios and Aliakmonas and of each river Delta for the period 1984-2009. A
further objective had been to quantitatively estimate for the same time period the erosion and
deposition rates taking place in the studied region. The ability of the different techniques in
mapping coastline changes as well as erosion and deposition rates was quantitatively
evaluated versus corresponding estimates provided by image-photo-interpretation carried out
in the same TM images.
Results from the time series analysis conducted showed similar patterns between the
different techniques in terms of coastline transformation for both rivers. Generally, areas in
which coastline transformation appeared to be changing were commonly identified between
all techniques. However, differences between the techniques were found in the rates of
erosion and deposition for the two rivers. Those were largely attributed to the ability of the
different techniques in utilising the spectral information content included in the TM
data.
KEYWORDS: coastlines, coastal sedimentation; littoral erosion; Landsat TM, remote
sensing, Geographic Information Systems, Axios and Aliakmonas rivers, Greece |
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