Ms. Konstantina K. Mexia Profile

Konstantina K. Mexia

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Proceedings Article | 20 October 2015 Paper

Headward erosion and deep erosion estimations in the wider area of Nemea, Greece, using GIS and freely available DSM

Konstantina Mexia

Proceedings Volume 9644, 96441B (2015) https://doi.org/10.1117/12.2194609

KEYWORDS: Oceanography, Geographic information systems, Geology, Data modeling, Spatial resolution, Minerals, Environmental sensing, Current controlled current source, Mouth, Data processing

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The objective of the present paper is to study and compare the headward erosion and deep erosion rates in the river systems of Asopos, Nemeas and Raizanis, which are in the wider area of the Nemea archaeological site, in the Peloponnese, Greece. The study area is a section of the NE part of the Peloponnese, specifically the zone between the villages of Velo and Vrachati. In the study area terraces appear, which have been mapped in detail and which correspond to isotopic stages of interglacial periods of the Pleistocene. The basic processes that act in our study area and have shaped the current relief is headward erosion and deep erosion, which are favoured by the dominant lithology and fault tectonic. The northern parts of the three river networks intersect sea at terraced levels, where the local terrace front backward retreat indicates the rate of headward erosion and the depth of the valleys at the terrace front indicates the rate of deep erosion. Thus we tried to calculate the rate of these two factors for each river system in order to understand the course of the phenomenon in time. In order to achieve our goal, we used geological and topographical maps of the area at a 1/50.000 scale. Mapinfo GIS software was used in order to make the necessary measurements. The results from the analysis of the topographic maps were compared with the results from freely available DSMs such as ASTER GDEM and SRTM DEM.

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