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Publications
Publications (35)
This study aims to evaluate the groundwater vulnerability to pollution in the porous aquifer of Nea Moudania, Chalkidiki, where the agricultural activity is intense. Two methods were used and compared: standard DRASTIC and AHP-DRASTIC. The Analytic Hierarchy Method (AHP) was implemented to modify the DRASTIC parameters’ weight in order to improve t...
The most accurate method for the estimation of the reference evapotranspiration ETo is the method of ASCE-EWRI Penman-Monteith (ASCE P-M) for the application of which measurements of temperature, relative humidity, wind speed and radiation are required. In many cases due to lack of meteorological data, it is estimated through empirical models that...
Groundwater vulnerability assessment is critical for the effective groundwater management, particularly in areas with significant anthropogenic activities, such as agriculture. In this study, seven different methods, namely, DRASTIC, Pesticide DRASTIC, SINTACS, Nitrate SINTACS, GOD, AVI, and SI, were implemented using Geographical Information Syste...
This study aims to evaluate and identify the groundwater vulnerability zones to pollution using a Modified DRASTIC (DRASTIC-LU) model in the porous aquifer of Nea Moudania, Chalkidiki, Greece. The validation of the produced vulnerability map is made by correlating nitrate concentration data in groundwater and vulnerability index.
In this work, the impacts of climate change on the water resources of the Olynthios River Basin in Northern Greece, were assessed. For this purpose, the climate change scenarios SRES and RCPs were used (SRES A1B, Α2 and RCP4.5, 8.5) - which were taken from two climate models, CGCM3.1/T63 and CanESM2, respectively - for two time periods (2031-2050 a...
The growing environmental awareness of society, the advancement of nature-based solutions (NbSs), and the need for reliable and cost-effective solutions create a favorable environment of opportunities for floating wetlands as alternative solutions for marine water pollution control. The aim of this work was to screen, through OpenLCA, the environme...
Agricultural management practices on fertilizer nitrogen are vital to soil sustainability and crop productivity, as well as to reducing global greenhouse gases and environmental pollution. An increasing number of models have been adapted for specific purposes and scales of application which may lead to better understanding of crop response under di...
The current Special Issue of European Water with title "Water Resources and Environmental Management" consists of five papers selected from the 14th Conference of the Hellenic Hydrotechnical Association on Water Resources and Environment. The Conference was held in University of Thessaly, Volos, Greece in May 2019 at the facilities of the Departmen...
The estimation of saturated hydraulic conductivity is a key parameter for studying the water flow in the unsaturated zone of the soil. In this work, a combined modelling approach of the waterfront movement is elaborated, integrating a physical analogue type device with image analysis. A customized Hele-Shaw apparatus is designed for the wetting pro...
In this paper, we present a new benchmark problem for testing both local and global optimization techniques. This problem is based on ideas from groundwater hydraulics and simple Euclidian geometry and has the following attractive features: (a) known values of the infinite global optima, which can be classified in a restricted number of sets, with...
The sustainable management of lakes and reservoirs requires the determination of their minimum environmental water level. Even though the assessment of minimum water level depends on a number of biotic and abiotic factors of the lake ecosystem, in many cases these factors are not entirely known and, furthermore, their evaluation is usually a challe...
The most important aspect of the agricultural systems is irrigation water management practices which require timely applied irrigation when the crop needs proper amount. There is a growing interest in deficit irrigation, an irrigation practice where the crop is exposed to a certain level of water stress either during particular phenological stages...
The design of a proper stream gauging network is a requirement in order to obtain accurate flow information, important for various purposes such as water resources management, flood forecasting and climate change impact assessment. Therefore, while it is necessary to minimise the number of stations in terms of feasibility and cost, the most suitabl...
In many real world applications of data envelopment analysis (DEA), sample surveys are employed to collect input and output data that may be imprecise or ambiguous. However, accurate input and output data are fundamentally indispensable in conventional DEA. This is due to the assumption underlying DEA, that all data assume specific numerical values...
In this work, the impacts of climate change on the water resources of the Olynthios River Basin in Northern Greece, were assessed. For this purpose, the climate change scenarios SRES and RCPs were used (SRES A1B, A2 and RCP4.5, 8.5)-which were taken from two climate models, CGCM3.1/T63 and CanESM2, respectively-for two time periods (2031-2050 and 2...
Adequate and accurate hydrometeorological data are very important for performing a range of hydrologic purposes, including water resources management, assessment of the impacts of climate change, and flood forecasting and warning. The rational prevention of natural disasters, such as floods and droughts, is strongly connected with a forecasting tec...
This study conducts an optimization and performance analysis of an on-demand pressurized irrigation network, which aims to combine least cost design and adequate hydraulic operation. For this purpose, the COPAM software was used as a modelling tool. First, the design of the irrigation network was optimized using Labye’s Iterative Discontinuous Meth...
The necessity of mitigating the consequences of energy dependence and water scarcity in remote areas, such as small islands puts forward the investigation of renewable energy sources. Especially in Aegean, the rich wind potential and natural topography favors the use of Hybrid Renewable Energy System (HRES). In this research work, a HRES in Fournoi...
In this paper, an optimisation model is developed to determine the optimal crop pattern and allocation of irrigation water under full and deficit irrigation conditions for adaptation to climate change. Climate change is considered as a global challenge with significant impacts on different aspects of social activity and on the natural environment....
In the current study an artificial neural network (ANN) is created for the investigation of the
rainfall – runoff relationship, in the water basin of Ilarion in Aliakmon river. For this reason,
six scenarios were created that were based on the ANN’s input parameters number and the
characteristics. The data that were used for the model calibratio...
In this paper, we introduce four new benchmark problems, which are based on rather common optimization issues of water resources management. These problems have the following features: a) adjustable difficulty, to cover a wide range of common engineering problems b) physical background familiar to scientists working on water resources management c)...
A combined regional drought analysis and forecast is elaborated and
applied to the Aison River Basin (Greece). The historical frequency,
duration and severity were estimated using the standardized
precipitation index (SPI) computed on variable time scales, while
short-term drought forecast was investigated by means of 3-D loglinear
models. A quasi-...
The purpose of the present paper is to investigate the hydrological components of the Aison River Basin in northern Greece. The orography of the area and the increasing irrigation needs require a specifically adapted hydrological model in order to address water management issues. With this aim in view, a parsimonious lumped simulation–optimization...
Precipitation has been widely considered as a starting point towards the apprehension of climate changes courses, constituting one of the most substantial components of the hydrologic cycle. The purpose of this work is to investigate the temporal variability of precipitation in order to contribute to a better interpretation of the hydrological stat...
In this paper, a benchmarking framework is presented for the performance assessment of irrigations systems. Firstly, a data envelopment analysis (DEA) is applied to measure the technical efficiency of irrigation systems. This method, based on linear programming, aims to determine a consistent efficiency ranking of irrigation systems in which known...
The inverse problem of groundwater flow is treated with an automatic method that can produce several alternative solutions at once. During their joint optimization, these solutions can exchange information in order to maintain some diversity and thus avoid a systematic premature convergence toward a single local minimum. Although genetic algorithms...
The boundary element method (BEM) can be used very efficiently, in solving groundwater flow problems. Genetic algorithms (GAs) constitute a very efficient optimization tool. In this paper, BEM and GAs have been combined to find optimal solutions in three classes of commonly encountered groundwater flow and mass transport problems: (a) determination...
Minimization of groundwater pumping cost, through proper distribution of the total flow rate to a number of existing wells, is a common problem in groundwater resources management. This paper deals in particular, with aquifers that bear zones of different transmissivities. A boundary element code is used for the numerical solution of the flow probl...
The purpose of this study is the investigation of point and areal drought in the Aison river basin (Pieria, Greece). The analysis is based on the run method, with precipitation as drought variable. Monthly precipitation measurements from 4 stations operating within the boundaries of the study area (Katerini, Lofos, Moschopotamos, Vrondou) are used...
Projects
Projects (2)
Mediterranean Sea is considered to be a high risk area of water pollution. The sea is a major oil transportation route and up to one million tons of crude oil is discharged annually from accidental spills, illegal bunkering, cleaning practices, and inadequate port facilities. Furthermore, has a dense network of maritime transport with more than 450 ports, hosts more than 20.000 fish-farms and receives considerable amounts of pollutants from urban, industrial and agricultural activities.
Floating Wetlands (FW) are the latest development of constructed wetlands, as eco-friendly systems for pollution control. In marine and coastal environment, FW represent a challenging and promising solution since: (a) they are able to withstand sea water level fluctuations and waves, and (b) they have lower cost of operation and maintenance comparing to conventional water treatment methods.
Aim of ATLANTIS project is the operational development and evaluation of Mediterranean Floating Wetlands as an environmental friendly and eco-innovative solution for marine pollution control in Mediterranean, with focus on petroleum hydrocarbons.
Project implementation includes: (1) Screening of water pollution problems in Mediterranean ports and development of seasonal water quality maps in the test site, (2) Lab scale experiments for the study of marine pollution control mechanisms in FW and the development of a customized system for Mediterranean, (3) Establishment and operational evaluation of a full scale system in a Mediterranean Port.
The project ATLANTIS following a multi-scientific approach, is characterized by several innovative elements in the scientific fields of constructed wetlands and sustainable water resources management. These include the research on water quality improvement mechanisms of FW as affected by salinity, the treatment of petroleum hydrocarbons in marine environment with FW, the development of a system adapted in Mediterranean conditions, and the full scale evaluation of floating wetlands in operational environment.
This research was funded by the Hellenic Foundation for Research and Innovation (HFRI) and the General Secretariat for Research and Innovation (GSRI), under grant agreement No 1928.
Scientific Coordinator: Dr. Takavakoglou Vasileios
Αγαπητοί φίλοι, βρίσκομαι στην ευχάριστη θέση να σας ανακοινώσω ότι η Ελληνική Υδροτεχνική Ένωση (Ε.Υ.Ε.) θα διοργανώσει το 14ο Συνέδριο της στις 16 και 17 Μαΐου 2019, στο Βόλο. Στη διοργάνωση του συνεδρίου συμμετέχουν το Τμήμα Γεωπονίας Ιχθυολογίας και Υδάτινου Περιβάλλοντος του Πανεπιστημίου Θεσσαλίας και το Τμήμα Πολιτικών Μηχανικών του Τ.Ε.Ι. Θεσσαλίας.
Σκοπός του συνεδρίου είναι η παρουσίαση επίκαιρης έρευνας και εφαρμογών από επιστήμονες σχετικά με τη Διαχείριση Υδατικών Πόρων και την Προστασία του Περιβάλλοντος. Το συνέδριο θα φιλοξενηθεί στις εγκαταστάσεις της Σχολής Γεωπονικών Επιστημών του Πανεπιστημίου Θεσσαλίας. Περισσότερες πληροφορίες θα ανακοινωθούν σε επόμενα ενημερωτικά μηνύματα. Στο πλαίσιο του συνεδρίου θα βραβευθούν οι καλύτερες πτυχιακές και διπλωματικές εργασίες στην επιστήμη του Νερού, που εκπονήθηκαν στο διάστημα μεταξύ 9/2015 – 10/2018. Σας περιμένουμε να σας φιλοξενήσουμε στον όμορφο Βόλο και να ανταλλάξουμε επιστημονικές απόψεις.
Dear Friends, I am pleased to announce that the Hellenic Hydrotechnical Union (E.Y.E.) will organize its 14th Conference. The conference will be co-organized by the Department of Ichthyology and Aquatic Environment of the University of Thessaly and the Department of Civil Engineering of TEI of Thessaly.
The purpose of the Conference is to present research and applications by scientists on the areas of Water Resources Management and Environmental Protection. The conference will be hosted at the premises of the School of Agricultural Sciences of the University of Thessaly. More information will be announced in future newsletters.
The conference will award the best graduate and diploma theses in Water Science, conducted between 9/2015 and 10/2018. We look forward to welcoming you to beautiful Volos and exchanging scientific opinions.
