In this paper we study the coastal zone in the region of Acheloos' River mouth and delta. In recent yeras, this region has been subjected to a series of environmental changes, primarily due to intense human activity concerning large hydroelectric dams. These dams created between 1960 and 1986 are responsible for important changes of the river's flow. The purpose of this study is to record the changes that have occurred between those yeras and present time; to define and analyze their possible consequences on the coastal geomorphology of the region. For this reason we used topographical and geological maps, aerial photos and finally satellite photos. A geographical database has been created in a GIS with environmental, geological, geomorphological and anthropogenic features of the studied aera. All digital data were analyzed spatially and quantitative in order to describe the change of delta shape, size and finally the occupied land use. Finally different thematic maps were created showing the geomorphological and environmental changes during those years.
This paper is a preliminary study of an extensive project that will take place at Corfu island (Northern island of Ionian Sea), involving the municipality of Esperion and the Remote Sensing Laboratory (University of Athens). The project's purpose is to estimate the erosion progress at Sidari bay's (North part of Corfu island) coastal zone, due to wave activity. Sidari area consists of Neogene formations, which are extremely vulnerable. Moreover, wave impact is also of high energy, causing subsidence of the coastal line.
Through this project, our team is developing a GIS database that holds information, deriving from existing maps, bibliographical references, and climatological logs, related to geology, geomorphology and environmental parameters. Apart from those data, aerial photography stereo-observation and extensive D-GPS fieldwork resulted to continual coastline monitoring and GIS database updating, for a period of 26 and 5 years, respectively. Project's conclusions are based on quantitative and spatial analysis through GIS, giving answers on the erosion's rate, the erosion's impact on human activities and structures, and finally an estimation on Sidari's coastal zone future morphology.
In this paper we study Samaria gorge through recognition, recording and visualization of geomorphological characteristics. Geomorphological characteristics collected through Remote Sensing techniques, are compared with those collected through stereoscopic observation of aerial photos and fieldwork. At the first phase, the aerial photos of the studied area were scanned and through selected digital image processing algorithms, the geomorphological characteristics were stressed and recorded. At the second phase a geomorphological map was created based on data derived from stereoscopic observation of the area aerial photos and fieldwork. During fieldwork a GPS was used, which was connected with the GIS in order to immediately record and test the measured characteristic position. Finally the combination of two methods took place in order to develop a geomorphological map.