Papers by Thanasis Psarogiannis
ISPRS International Journal of Geo-Information
Extraction and dissemination of historical geospatial data from early maps are major goals of his... more Extraction and dissemination of historical geospatial data from early maps are major goals of historical geographic information systems (HGISs) in the context of the spatial humanities. This paper illustrates the process of interpreting, georeferencing, organizing, and visualizing the content of a historical map of Cyprus in the context of GISs and highlights the development of a national-scale spatial database of the island in the 19th century. This method was applied to Lord Kitchener’s historical map of Cyprus (published in 1885), which is considered the product of the first scientific topographic survey of Cyprus, is rich in geographic information about the area, and covers the entire island at a scale of 1:63,360. Previous attempts to create historical geodatabases have either focused on small areas or, when conducted on a national scale, have been thematically focused. The positional accuracy of the map was found to be 1.08 mm in map units, which was equivalent to 68.76 m on t...
Το νερό, ως γνωστόν, είναι ένας πόρος κρίσιμος για τον άνθρωπο, για τη ζωή του και τις δραστηριότ... more Το νερό, ως γνωστόν, είναι ένας πόρος κρίσιμος για τον άνθρωπο, για τη ζωή του και τις δραστηριότητές του. Για το λόγο αυτό, η αξιοποίησή του είναι ένας σημαντικός παράγοντας για την πρόοδο και την εξέλιξή του και απαιτείται ένα σύνολο δράσεων προκειμένου, τον φυσικό αυτό πόρο, να μπορέσει να τον διαχειριστεί με τρόπο βιώσιμο. Η παρούσα εργασία περιγράφει μια μεθοδολογία αξιοποίησης υδατικών πόρων με τη δημιουργία μικρών ορεινών και ημιορεινών ταμιευτήρων νερού. Η μοντελοποίηση πραγματοποιείται με τη χρήση των Γεωγραφικών Συστημάτων Πληροφοριών (GIS), τη χρήση του υδρολογικού ομοιώματος SWAT και χρήση Λογισμικού Προσομοίωσης Ταμιευτήρα. Η Ν. Άνδρος επιλέχθηκε ως περιοχή μελέτης της εργασίας και η διαδικασία της περιλαμβάνει την υδρολογική ανάλυσή της και κατόπιν την εκτίμηση της επιφανειακής απορροής (μέσω του υδρολογικού ομοιώματος SWAT για 100 χρόνια προσομοίωσης) σε μια συγκεκριμένη λεκάνη απορροής, τη λεκάνη των Αφρουσών. Σε δύο διαφορετικές επιλεγμένες θέσεις της λεκάνης διερευ...
Floods are physical global hazards with negative environmental and socio-economic impacts on loca... more Floods are physical global hazards with negative environmental and socio-economic impacts on local and regional scale. The technological evolution during the last decades, especially in the field of geoinformatics, has offered new advantages in hydrological modelling. This study seeks to use this technology in order to quantify flood risk assessment. The study area which was used is an ungauged catchment and by using mostly GIS hydrological and geomorphological analysis together with a GIS-based distributed Unit Hydrograph model, a series of outcomes have risen. More specifically, this paper examined the behaviour of the Kladeos basin (Peloponnese, Greece) using real rainfall data, as well hypothetical storms. The hydrological analysis held using a Digital Elevation Model of 5x5m pixel size, while the quantitative drainage basin characteristics were calculated and were studied in terms of stream order and its contribution to the flood. Unit Hydrographs are, as it known, useful when there is lack of data and in this work, based on time-area method, a sequences of flood risk assessments have been made using the GIS technology. Essentially, the proposed methodology estimates parameters such as discharge, flow velocity equations etc. in order to quantify flood risk assessment.
Water, 2020
Efficient and sustainable exploitation of water resources requires the adoption of innovative and... more Efficient and sustainable exploitation of water resources requires the adoption of innovative and contemporary management techniques, a need that becomes even more demanding due to climate change and increasing pressures coming from anthropogenic activities. An important outcome of this reality is the qualitative and quantitative degradation of groundwater, which clearly indicates the need to exploit surface runoff. This study presents an integrated Geographic Information System (GIS)-based methodological framework for revealing and selecting suitable locations to build small-scale reservoirs and exploit surface runoff. In this framework, the SWAT model was used to quantify surface runoff, followed by the simulation of reservoir scenarios through reservoir simulation software. Andros Island (located in Cyclades Prefecture), Greece was selected as the study area. The obtained results indicated the most suitable location for creating a reservoir for maximizing exploitation of surface ...
Water is known to be a critical resource for people, for life and business. For this reason, the ... more Water is known to be a critical resource for people, for life and business. For this reason, the exploitation is an important factor for progress and development and requires a set of actions in order to be able to manage this natural resource in a sustainable way. This paper describes a methodology for exploitation of water resources by creating small mountainous and upland reservoirs. The modeling performed using Geographic Information Systems (GIS) and the SWAT hydrologic model and by using the Reservoir Simulation software by TechnoLogismiki company. Andros Island was chosen as the case study area of this project and the process includes the hydrologic analysis and then assessing the runoff (through the water phantom for 100 years SWAT simulation) in a particular river catchment, the Afrouses catchment. In two different selected locations of the basin investigated the feasibility of building a dam, with the simultaneous creation of a water reservoir, based on the failure rates o...
Decisions about water releases from dam reservoirs are often guided by rule curves which show tar... more Decisions about water releases from dam reservoirs are often guided by rule curves which show target storage levels that should be maintained in the reservoirs in different months of the year. If these targets are unattainable in any month during operation, then a cutback in releases has to be made in that month. However, because of the way they are developed, traditional control curves do not give any guidance on the level of the cutback, implying that the action of the operator may or may not succeed. In this paper, a sequential reservoir analysis technique was used to develop control curves with an integral attribute of vulnerability, which defines the level of cutback. The superiority of the new control curves over traditional ones was demonstrated by using them to simulate some hypothetical reservoirs.
ABSTRACT The pressure on water resources is expected to be even greater during the next years due... more ABSTRACT The pressure on water resources is expected to be even greater during the next years due to population growth, climate change, regional polarizations of economic activities, etc. Thus, the management of water resources requires, beyond the adoption of policies preventing water wastage and depletion, the implementation of water schemes based on surface runoff development techniques to meet needs at regional/local level. It is, therefore, necessary, in many cases, to conceive, plan and build water projects founded on adequate/adapted technology, by using locally-regionally existing materials and techniques, aiming at the development of local socio-economical dynamics, creation of jobs, protection of the environment, etc. There is no contradiction in modern environments if combining the above mentioned type of technical paradigms with high technology standards. This paper presents the systemic advantages of that type adequate/adapted technology small reservoirs and a GIS-based land planning technique for their positioning.
Efficient and sustainable exploitation of water resources requires the adoption of innovative and... more Efficient and sustainable exploitation of water resources requires the adoption of innovative and contemporary management techniques, a need that becomes even more demanding due to climate change and increasing pressures coming from anthropogenic activities. An important outcome of this reality is the qualitative and quantitative degradation of groundwater, which clearly indicates the need to exploit surface runoff. This study presents an integrated Geographic Information System (GIS)-based methodological framework for revealing and selecting suitable locations to build small-scale reservoirs and exploit surface runoff. In this framework, the SWAT model was used to quantify surface runoff, followed by the simulation of reservoir scenarios through reservoir simulation software. Andros Island (located in Cyclades Prefecture), Greece was selected as the study area. The obtained results indicated the most suitable location for creating a reservoir for maximizing exploitation of surface runoff, based on the specific water demands of the nearby areas and the existing meteorological, hydrological, and geological background potential. Thus, two selected dam locations are analyzed by using the proposed framework. The findings showed that the first dam site is inappropriate for creating a reservoir, as it cannot meet the demand for large water extraction volumes. In addition, the outcomes confirmed the efficiency of the proposed methodology in optimum selection of locations to construct small-scale water exploitation works. This research presents a contemporary methodological framework that highlights the capability of GIS, SWAT modeling, and reservoir simulation coupling in detecting optimal locations for constructing small reservoirs.
Water, 2020
Efficient and sustainable exploitation of water resources requires the adoption of innovative and... more Efficient and sustainable exploitation of water resources requires the adoption of innovative and contemporary management techniques, a need that becomes even more demanding due to climate change and increasing pressures coming from anthropogenic activities. An important outcome of this reality is the qualitative and quantitative degradation of groundwater, which clearly indicates the need to exploit surface runoff. This study presents an integrated Geographic Information System (GIS)-based methodological framework for revealing and selecting suitable locations to build small-scale reservoirs and exploit surface runoff. In this framework, the SWAT model was used to quantify surface runoff, followed by the simulation of reservoir scenarios through reservoir simulation software. Andros Island (located in Cyclades Prefecture), Greece was selected as the study area. The obtained results indicated the most suitable location for creating a reservoir for maximizing exploitation of surface runoff, based on the specific water demands of the nearby areas and the existing meteorological, hydrological, and geological background potential. Thus, two selected dam locations are analyzed by using the proposed framework. The findings showed that the first dam site is inappropriate for creating a reservoir, as it cannot meet the demand for large water extraction volumes. In addition, the outcomes confirmed the efficiency of the proposed methodology in optimum selection of locations to construct small-scale water exploitation works. This research presents a contemporary methodological framework that highlights the capability of GIS, SWAT modeling, and reservoir simulation coupling in detecting optimal locations for constructing small reservoirs.
1. The geophysical prospections gave positive evidence for the existence of a possible continuati... more 1. The geophysical prospections gave positive evidence for the existence of a possible continuation of the slipways complex to the south. 2. Structurally, newly recorded architectural details on the ramps instructive of the (today lost) wooden infrastructure used on the hauling and launching operations of ancient oared warships enrich the existing record. 3. There is more evidence to pursue the study on the naval craft that was accommodated on the slipways, especially ratios of width : length of medium-sized oared warships. 4. We are now able to propose a reconstructed plan of a complex consisting of rock-cut slipways of different widths, a complex that shows certain similarities with archaeological parallels in the Aegean and the Mediterranean.
Decisions about water releases from dam reservoirs are often guided by rule curves which show tar... more Decisions about water releases from dam reservoirs are often guided by rule curves which show target storage levels that should be maintained in the reservoirs in different months of the year. If these targets are unattainable in any month during operation, then a cutback in releases has to be made in that month. However, because of the way they are developed, traditional control curves do not give any guidance on the level of the cutback, implying that the action of the operator may or may not succeed. In this paper, a sequential reservoir analysis technique was used to develop control curves with an integral attribute of vulnerability, which defines the level of cutback. The superiority of the new control curves over traditional ones was demonstrated by using them to simulate some hypothetical reservoirs.
The pressure on water resources is expected to be even greater during the next years due to popul... more The pressure on water resources is expected to be even greater during the next years due to population growth, climate change, regional polarizations of economic activities, etc. Thus, the management of water resources requires, beyond the adoption of policies preventing water wastage and depletion, the implementation of water schemes based on surface runoff development techniques to meet needs at regional/local level. It is, therefore, necessary, in many cases, to conceive, plan and build water projects founded on adequate/adapted technology, by using locally-regionally existing materials and techniques, aiming at the development of local socio-economical dynamics, creation of jobs, protection of the environment, etc. There is no contradiction in modern environments if combining the above mentioned type of technical paradigms with high technology standards. This paper presents the systemic advantages of that type adequate/adapted technology small reservoirs and a GIS-based land planning technique for their positioning.
Integrated and sustainable urban solid waste management is one of the most important environmenta... more Integrated and sustainable urban solid waste management is one of the most important environmental problems in Europe and worldwide. According to modern legislations and newly promoted practices and trends in Europe as well as internationally, a complex way of urban solid waste management tends to prevail. This management method combines the Processing Unit and the Sanitary Landfill for the Residues of the process. A variety of parameters and restrictions apply when planning the siting of Residue Sanitary Landfills (RSL). The urban solid waste management problem and specifically the matter of RSL siting is constantly becoming more and more important in developed and developing countries due to pressures coming from population and urbanization growth, continuously increasing living needs and many other factors. Technology evolution and especially Geoinformatics tools, such as Geographic Information Systems (GIS) and Remote Sensing (RS), constitute rather effective ways to approach and research issues like the problem of urban solid waste management and mainly the optimal delimitation of RSL.
The aim of this paper is to locate suitable – optimal areas that can be used for placing RSL in the island of Tinos, based on legislation, environmental, economic and social criteria. The methodology followed in this research effort is developed via Geographic Information Systems (GIS) by creating a spatial database which contains all the above-mentioned criteria. This research procedure includes an important number of different method trials. The result of this process indicate several places for placing RSL in Tinos Island.
Solid waste collection and transportation constitutes one of the most significant environmental a... more Solid waste collection and transportation constitutes one of the most significant environmental and socio-economic worldwide problems. The constant global population growth with a consequent increase in human needs leads to the aggravation of the phenomenon. The objective of this study is to determine the optimal routes for waste collection and transportation based on distance, time, fuel consumption and carbon dioxide (CO2) emission in Heraklion city, Crete, Greece. In order to find the optimal routes, a spatial model was created under the framework of Geographic Information System-based network analysis. The methodology includes data collection, model construction, analysis as well as the quantification of environmental, social and economic benefits, which includes the comparison of the current status with the obtained results from the modeling. The results from this study include the optimal routes generated by the methodology described above and their comparison with the existing practices. The comparison is carried out in quantitative terms, in order to ensure optimum management of economic and natural resources as well as human welfare.
Water is known to be a critical resource for people, for life and business. For this reason, the ... more Water is known to be a critical resource for people, for life and business. For this reason, the exploitation is an important factor for progress and development and requires a set of actions in order to be able to manage this natural resource in a sustainable way. This paper describes a methodology for exploitation of water resources by creating small mountainous and upland reservoirs. The modeling performed using Geographic Information Systems (GIS) and the SWAT hydrologic model and by using the Reservoir Simulation software by TechnoLogismiki company. Andros Island was chosen as the case study area of this project and the process includes the hydrologic analysis and then assessing the runoff (through the water phantom for 100 years SWAT simulation) in a particular river catchment, the Afrouses catchment. In two different selected locations of the basin investigated the feasibility of building a dam, with the simultaneous creation of a water reservoir, based on the failure rates of abstraction fixed volume of water annually. (in press/in Greek).
Conference Presentations by Thanasis Psarogiannis
1. The geophysical prospections gave positive evidence for the existence of a possible continuati... more 1. The geophysical prospections gave positive evidence for the existence of a possible continuation of the slipways complex to the south. 2. Structurally, newly recorded architectural details on the ramps instructive of the (today lost) wooden infrastructure used on the hauling and launching operations of ancient oared warships enrich the existing record. 3. There is more evidence to pursue the study on the naval craft that was accommodated on the slipways, especially ratios of width : length of medium-sized oared warships. 4. We are now able to propose a reconstructed plan of a complex consisting of rock-cut slipways of different widths, a complex that shows certain similarities with archaeological parallels in the Aegean and the Mediterranean.
Floods are physical global hazards with negative environmental and socio-economic impacts on loca... more Floods are physical global hazards with negative environmental and socio-economic impacts on local and regional scale. The technological evolution during the last decades, especially in the field of geoinformatics, has offered new advantages in hydrological modelling. This study seeks to use this technology in order to quantify flood risk assessment.
The study area which was used is an ungauged catchment and by using mostly GIS hydrological and geomorphological analysis together with a GIS-based distributed Unit Hydrograph model, a series of outcomes have risen. More specifically, this paper examined the behaviour of the Kladeos basin (Peloponnese, Greece) using real rainfall data, as well hypothetical storms. The hydrological analysis held using a Digital Elevation Model of 5x5m pixel size, while the quantitative drainage basin characteristics were calculated and were studied in terms of stream order and its contribution to the flood. Unit Hydrographs are, as it known, useful when there is lack of data and in this work, based on time-area method, a sequences of flood risk assessments have been made using the GIS technology. Essentially, the proposed methodology estimates parameters such as discharge, flow velocity equations etc. in order to quantify flood risk assessment.
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Papers by Thanasis Psarogiannis
The aim of this paper is to locate suitable – optimal areas that can be used for placing RSL in the island of Tinos, based on legislation, environmental, economic and social criteria. The methodology followed in this research effort is developed via Geographic Information Systems (GIS) by creating a spatial database which contains all the above-mentioned criteria. This research procedure includes an important number of different method trials. The result of this process indicate several places for placing RSL in Tinos Island.
Conference Presentations by Thanasis Psarogiannis
The study area which was used is an ungauged catchment and by using mostly GIS hydrological and geomorphological analysis together with a GIS-based distributed Unit Hydrograph model, a series of outcomes have risen. More specifically, this paper examined the behaviour of the Kladeos basin (Peloponnese, Greece) using real rainfall data, as well hypothetical storms. The hydrological analysis held using a Digital Elevation Model of 5x5m pixel size, while the quantitative drainage basin characteristics were calculated and were studied in terms of stream order and its contribution to the flood. Unit Hydrographs are, as it known, useful when there is lack of data and in this work, based on time-area method, a sequences of flood risk assessments have been made using the GIS technology. Essentially, the proposed methodology estimates parameters such as discharge, flow velocity equations etc. in order to quantify flood risk assessment.
The aim of this paper is to locate suitable – optimal areas that can be used for placing RSL in the island of Tinos, based on legislation, environmental, economic and social criteria. The methodology followed in this research effort is developed via Geographic Information Systems (GIS) by creating a spatial database which contains all the above-mentioned criteria. This research procedure includes an important number of different method trials. The result of this process indicate several places for placing RSL in Tinos Island.
The study area which was used is an ungauged catchment and by using mostly GIS hydrological and geomorphological analysis together with a GIS-based distributed Unit Hydrograph model, a series of outcomes have risen. More specifically, this paper examined the behaviour of the Kladeos basin (Peloponnese, Greece) using real rainfall data, as well hypothetical storms. The hydrological analysis held using a Digital Elevation Model of 5x5m pixel size, while the quantitative drainage basin characteristics were calculated and were studied in terms of stream order and its contribution to the flood. Unit Hydrographs are, as it known, useful when there is lack of data and in this work, based on time-area method, a sequences of flood risk assessments have been made using the GIS technology. Essentially, the proposed methodology estimates parameters such as discharge, flow velocity equations etc. in order to quantify flood risk assessment.
παρέχει την δυνατότητα εφαρμογής των μεθοδολογικών εκείνων εργαλείων για την ψηφιακή
αξιοποίηση των ιστορικών χαρτών, όπως αυτός της Κύπρου που εκπονήθηκε από τον
Η.Η.Kitchener μεταξύ 1878 και 1883. Με διδόμενο το ένα από τα 16 φύλλα του προαναφερθέντος
χάρτη και στο πλαίσιο των εργασιών του ερευνητικού προγράμματος με τίτλο «Κατασκευή Βάσης
Χαρτογραφικών δεδομένων και διαδικτυακής εφαρμογής παρουσίασης των γεωγραφικών
πληροφοριών του Χάρτη του Kitchener για τη νήσο Κύπρο (έκδ. 1885)» επιχειρήθηκε ο σχεδιασμός
και η οργάνωση της βάσης γεωγραφικών δεδομένων με την χρήση λογισμικού GIS, προκειμένου
να εξαχθεί το «ψηφιακό αντίγραφο» του πρωτότυπου χάρτη ως οργανωμένη αποθήκευση μιας
αυτοτελούς χαρτογραφικής ενότητας (Παπαδάκης et al, 1996). Στόχος αποτελεί η δημιουργία ενός
δυναμικού «χάρτη» ο οποίος θα καλύπτει τις ανάγκες των επιστημονικών πεδίων που
ενδιαφέρονται για την καταγραφή του Kitchener, αλλά παράλληλα θα μπορεί να αποτελεί τη βάση
για συνεχή τροφοδότηση με νέα επίκαιρα ή ιστορικά ποσοτικά και ποιοτικά χωρικά δεδομένα,
δημιουργώντας συνέχεια νέα ερωτήματα και νέες απαντήσεις.