Research Interests: Geology, Hydrogeology, Statistics, Spatial Analysis, Hydrology, and 18 moreHydrochemistry, Multidisciplinary, Logistic Regression, Optimization, Models, Correlation, Classification, Regression, Ground Water, Contamination, Aquifers, Experimentation, Vulnerability assessment, Statistical Test, Weight of Evidence, Geographic Information Systems (GIS), Geographic Information Systems, and Hybrid Method(Hydrochemistry, Multidisciplinary, Logistic Regression, Optimization, Models, Correlation, Classification, Regression, Ground Water, Contamination, Aquifers, Experimentation, Vulnerability assessment, Statistical Test, Weight of Evidence, Geographic Information Systems (GIS), Geographic Information Systems, and Hybrid Method)
(Hydrochemistry, Multidisciplinary, Logistic Regression, Optimization, Models, Correlation, Classification, Regression, Ground Water, Contamination, Aquifers, Experimentation, Vulnerability assessment, Statistical Test, Weight of Evidence, Geographic Information Systems (GIS), Geographic Information Systems, and Hybrid Method)
Research Interests:
Research Interests:
The assessment of groundwater vulnerability to pollution has proved to be an effective tool for the delin-eation of protection zones in areas affected by groundwater contamination due to intensive fertilizer applications. By modifying and... more
The assessment of groundwater vulnerability to pollution has proved to be an effective tool for the delin-eation of protection zones in areas affected by groundwater contamination due to intensive fertilizer applications. By modifying and optimizing the well known and widely used DRASTIC model it was possible to predict the intrinsic vulnerability to pollution as well as the groundwater pollution risk more accurately. This method incorporated the use of simple statistical and geostatistical techniques for the revision of the factor ratings and weightings of all the DRASTIC parameters under a GIS environment. The criterion for these modifications was the correlation coefficient of each parameter with the nitrates concentration in groundwater. On the basis of their statistical significance, some parameters were subtracted from the DRASTIC equation, while land use was considered as an additional DRASTIC parameter. Following the above-mentioned modifications, the correlation coefficient between groundwater pollution risk and nitrates concentration was considerably improved and rose to 33% higher than the original method. The model was applied to a part of Trifilia province, Greece, which is considered to be a typical Mediterranean region with readily available hydrogeological and hydrochemical data.
Groundwater and saline intrusion. Selected papers from the 18th Salt Water Intrusion Meeting. Cartagena, Spain. Publ. Geological Survey of Spain (ed. L. Araguas, E. Custodio, M. Manzano), 465-480. ... Enter the email address you signed up... more
Groundwater and saline intrusion. Selected papers from the 18th Salt Water Intrusion Meeting. Cartagena, Spain. Publ. Geological Survey of Spain (ed. L. Araguas, E. Custodio, M. Manzano), 465-480. ... Enter the email address you signed up with, and we'll send an ...
Research Interests:
The results of a ground water isotopic research program conducted during the period 2004-2008 by an IGME/Hydrogeology Department team in the area of North Ko-rinthian prefecture are presented here. 69 ground water samples were collected... more
The results of a ground water isotopic research program conducted during the period 2004-2008 by an IGME/Hydrogeology Department team in the area of North Ko-rinthian prefecture are presented here. 69 ground water samples were collected during the period 6/2007 and analyzed in the laboratory of Isotope Hydrology of NCSR "Demokritos" for Oxygen isotopes δ 18 O and Tritium. From the spatial distribution of δ 18 O, the conglomerate aquifer systems seem to be recharging from their outcrop areas and possibly laterally from the karstic systems that outcrops in higher altitudes. The rest aquifer systems of the area seem to be recharging exclusively from their outcrop areas with the exception of the Vocha coastal alluvial aquifer which seem to be recharging almost totally from waters coming from higher altitudes. According to the spatial distribution of Tritium in both Sikion–Velo and Vrachati– Lechaio areas, low Tritium values are observed which are indicative of the fact that the aquifer system of those areas are recharged from vertical seepage from the riverbeds of Asopos and Rachiani rivers respectively. Contrariwise in the area of Krines–Zevgolatio the high values of Tritium reveal the lateral recharge from the adjacent marine terraces and marl aquifers.
Research Interests:
During the period 2004-2008 a hydrogeological investigation project was conducted by an IGME/Hydrogeology Department team in the area of North Peloponnesus, funded by the 3rd EU Framework Directive budget. In 2008 using the results of... more
During the period 2004-2008 a hydrogeological investigation project was conducted by an IGME/Hydrogeology Department team in the area of North Peloponnesus, funded by the 3rd EU Framework Directive budget. In 2008 using the results of this investigation and implementing article 5 of Water Framework Directive 60/2000/EU as well as articles of Ground Water Directive 2006/118/EU, eleven ground water bodies (management units) were able to be identified in this area. Using the DPSIR criteria six of them found to be needed further characterization and two out of these six were concluded not to be able to fulfil the required good (quantitative and chemical) groundwater status by 2015. All these results are presented here.
Research Interests:
The results of a ground water isotopic research program conducted during the period 2004-2008 by an IGME/Hydrogeology Department team in the area of North Korinthian prefecture are presented here. 69 ground water samples were collected... more
The results of a ground water isotopic research program conducted during the period 2004-2008 by an IGME/Hydrogeology Department team in the area of North Korinthian prefecture are presented here. 69 ground water samples were collected during the period 6/2007 and analyzed in the laboratory of Isotope Hydrology of NCSR "Demokritos" for Oxygen isotopes δ18O and Tritium. From the spatial distribution of δ18O, the conglomerate aquifer systems seem to be recharging from their outcrop areas and possibly laterally from the karstic systems that outcrops in higher altitudes. The rest aquifer systems of the area seem to be recharging exclusively from their outcrop areas with the exception of the Vocha coastal alluvial aquifer which seem to be recharging almost totally from waters coming from higher altitudes. According to the spatial distribution of Tritium in both Sikion–Velo and Vrachati–Lechaio areas, low Tritium values are observed which are indicative of the fact that the aquifer system of those areas are recharged from vertical seepage from the riverbeds of Asopos and Rachiani rivers respectively. Contrariwise in the area of Krines–Zevgolatio the high values of Tritium reveal the lateral recharge from the adjacent marine terraces and marl aquifers.
Research Interests:
The implementation of a geographic information system (GIS)/fuzzy spatial decision support system in the selection of sites for drinking-water pumping boreholes is described. Groundwater is the main source of domestic supply and... more
The implementation of a geographic information
system (GIS)/fuzzy spatial decision support system in
the selection of sites for drinking-water pumping boreholes
is described. Groundwater is the main source of
domestic supply and irrigation in Korinthia prefecture,
south-eastern Greece. Water demand has increased considerably
over the last 30 years and is mainly met by
groundwater abstracted via numerous wells and boreholes.
The definition of the most “suitable” site for the drilling of
new boreholes is a major issue in this area. A method of
allocating suitable locations has been developed based on
multicriteria analysis and fuzzy logic. Twelve parameters
were finally involved in the model, prearranged into three
categories: borehole yield, groundwater quality, and
economic and technical constraints. GIS was used to
create a classification map of the research area, based on
the suitability of each point for the placement of new
borehole fields. The coastal part of the study area is
completely unsuitable, whereas high values of suitability
are recorded in the south-western part. The study
demonstrated that the method of multicriteria analysis in
combination with fuzzy logic is a useful tool for selecting
the best sites for new borehole drilling on a regional scale.
The results could be used by local authorities and
decision-makers for integrated groundwater resources
management.
system (GIS)/fuzzy spatial decision support system in
the selection of sites for drinking-water pumping boreholes
is described. Groundwater is the main source of
domestic supply and irrigation in Korinthia prefecture,
south-eastern Greece. Water demand has increased considerably
over the last 30 years and is mainly met by
groundwater abstracted via numerous wells and boreholes.
The definition of the most “suitable” site for the drilling of
new boreholes is a major issue in this area. A method of
allocating suitable locations has been developed based on
multicriteria analysis and fuzzy logic. Twelve parameters
were finally involved in the model, prearranged into three
categories: borehole yield, groundwater quality, and
economic and technical constraints. GIS was used to
create a classification map of the research area, based on
the suitability of each point for the placement of new
borehole fields. The coastal part of the study area is
completely unsuitable, whereas high values of suitability
are recorded in the south-western part. The study
demonstrated that the method of multicriteria analysis in
combination with fuzzy logic is a useful tool for selecting
the best sites for new borehole drilling on a regional scale.
The results could be used by local authorities and
decision-makers for integrated groundwater resources
management.
Research Interests:
During the period 2004-2008 a hydrogeological investigation project was conducted by an IGME/Hydrogeology Department team in the area of North Peloponnesus, funded by the 3rd EU Framework Directive budget. In 2008 using the results of... more
During the period 2004-2008 a hydrogeological investigation project was conducted by an IGME/Hydrogeology Department team in the area of North Peloponnesus, funded by the 3rd EU Framework Directive budget. In 2008 using the results of this investigation and implementing article 5 of Water Framework Directive 60/2000/EU as well as articles of Ground Water Directive 2006/118/EU, eleven ground water bodies (management units) were able to be identified in this area. Using the DPSIR criteria six of them found to be needed further characterization and two out of these six were concluded not to be able to fulfil the required good (quantitative and chemical) groundwater status by 2015. All these results are presented here.
The assessment of groundwater vulnerability to pollution has proved to be an effective tool for the delineation of protection zones in areas affected by groundwater contamination due to the intensive fertilizer applications. The main... more
The assessment of groundwater vulnerability to pollution has proved to be an effective tool for the delineation of protection zones in areas affected by groundwater contamination due to the intensive fertilizer applications. The main objective of this study has been to develop and check the results of three hybrid methods for specific aquifer vulnerability assessment based upon the parameters, classification and rating principles of the well known DRASTIC model. The first method, proposed by [Panagopoulos, G., Antonakos, A., Lambrakis, N., 2006. Optimization of DRASTIC model for groundwater vulnerability assessment, by the use of simple statistical methods and GIS. Hydrogeology Journal (published online).], has proved to be an effective way to modify the DRASTIC model in order to achieve better correlation with actual nitrates occurrence. Descriptive statistics and simple statistical tests on a hydrochemical dataset are used by the method in order to change the initial factor ratings and factor weights participating in the vulnerability assessment equation. The other two methods were developed by the use of logistic regression and weights of evidence statistical procedures and the use of the same hydrochemical dataset, and attain relatively high correlation factors when referring to sample points while correlation was significantly lower for the entire distributions of vulnerability estimation and actual nitrates occurrence.
Research Interests:
Research Interests: Geology, Hydrogeology, Water, Statistical Analysis, Geostatistics, and 20 moreAgriculture, Environmental Monitoring, Water Pollution, Multidisciplinary, Multivariate Analysis, Factor analysis, Discriminant Analysis, Water Supply, Ground Water, Nitrates, Cluster Analysis, Aquifers, Fertilizers, Five Factor Model, Water Movements, Organic Matter, Aquifer Recharge, Geographic Information Systems, Environmental Parameter, and Unsaturated Zone(Agriculture, Environmental Monitoring, Water Pollution, Multidisciplinary, Multivariate Analysis, Factor analysis, Discriminant Analysis, Water Supply, Ground Water, Nitrates, Cluster Analysis, Aquifers, Fertilizers, Five Factor Model, Water Movements, Organic Matter, Aquifer Recharge, Geographic Information Systems, Environmental Parameter, and Unsaturated Zone)
(Agriculture, Environmental Monitoring, Water Pollution, Multidisciplinary, Multivariate Analysis, Factor analysis, Discriminant Analysis, Water Supply, Ground Water, Nitrates, Cluster Analysis, Aquifers, Fertilizers, Five Factor Model, Water Movements, Organic Matter, Aquifer Recharge, Geographic Information Systems, Environmental Parameter, and Unsaturated Zone)