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Groundwater vulnerability assessment of a coastal aquifer system at River Nestos eastern Delta, Greece

Pedreira, R. and Kallioras, A. and Pliakas, F. and Gkiougkis, I. and Schüth, Christoph (2015):
Groundwater vulnerability assessment of a coastal aquifer system at River Nestos eastern Delta, Greece.
In: Environmental Earth Sciences, Springer Berlin Heidelberg, pp. 6387-6415, 73, (10), ISSN 18666299, DOI: 10.1007/s12665-014-3864-7, [Online-Edition: http://link.springer.com/10.1007/s12665-014-3864-7],
[Article]

Abstract

Processes such as urbanization, agricultural development and industrialization have led to increasing demand of groundwater resources resulting in pollution threats to groundwater in different ways, either as contaminant loads on the ground surface, or as seawater intrusion due to overexploitation of wells in the coastal zone. Two groundwater vulnerability indices are applied in this paper to assess the potential risk of groundwater contamination in the eastern delta of Nestos River, Greece. DRASTIC model is used in this paper to evaluate the groundwater vulnerability of the area with focus on agrochemical contaminants, more especially on nitrate pollution, since the region is highly cultivated. Additionally, GALDIT index is also applied to assess the vulnerability of the freshwater aquifer to seawater intrusion, as the extensive pumping of the coastal wells has led to this phenomenon. The vulnerability assessment showed that the study area experiences low to moderate groundwater vulnerability to agrochemical contaminants, as well as moderate to high vulnerability to seawater intrusion. The use of GIS for both vulnerability indices was found effective for the evaluation of each method in comparison to real field data.

Item Type: Article
Erschienen: 2015
Creators: Pedreira, R. and Kallioras, A. and Pliakas, F. and Gkiougkis, I. and Schüth, Christoph
Title: Groundwater vulnerability assessment of a coastal aquifer system at River Nestos eastern Delta, Greece
Language: English
Abstract:

Processes such as urbanization, agricultural development and industrialization have led to increasing demand of groundwater resources resulting in pollution threats to groundwater in different ways, either as contaminant loads on the ground surface, or as seawater intrusion due to overexploitation of wells in the coastal zone. Two groundwater vulnerability indices are applied in this paper to assess the potential risk of groundwater contamination in the eastern delta of Nestos River, Greece. DRASTIC model is used in this paper to evaluate the groundwater vulnerability of the area with focus on agrochemical contaminants, more especially on nitrate pollution, since the region is highly cultivated. Additionally, GALDIT index is also applied to assess the vulnerability of the freshwater aquifer to seawater intrusion, as the extensive pumping of the coastal wells has led to this phenomenon. The vulnerability assessment showed that the study area experiences low to moderate groundwater vulnerability to agrochemical contaminants, as well as moderate to high vulnerability to seawater intrusion. The use of GIS for both vulnerability indices was found effective for the evaluation of each method in comparison to real field data.

Journal or Publication Title: Environmental Earth Sciences
Volume: 73
Number: 10
Publisher: Springer Berlin Heidelberg
Uncontrolled Keywords: Coastal aquifer management,Coastal hydrogeology,DRASTIC,GALDIT,Groundwater pollution,Seawater intrusion,Vulnerability index
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Hydrogeology
11 Department of Materials and Earth Sciences
Date Deposited: 04 Apr 2018 09:07
DOI: 10.1007/s12665-014-3864-7
Official URL: http://link.springer.com/10.1007/s12665-014-3864-7
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