Nicolas R. Dalezios

• BSc, MS, PhD
• Professor at University of Thessaly

Drought is a widespread natural hazard resulting from an extended period of reduced rainfall, with significant socioeconomic and ecological consequences. Drought severity can impact food security globally due to its high spatial and temporal coverage. The primary objective of this paper consists of a comparative spatiotemporal analysis of environme...

Citation: Sakellariou, S.; Spiliotopoulos, M.; Alpanakis, N.; Faraslis, I.; Sidiropoulos, P.; Tziatzios, G.A.; Karoutsos, G.; Dalezios, N.R.; Dercas, N. Spatiotemporal Drought Assessment Based on Gridded Standardized Precipitation Index (SPI) in Vulnerable Agroecosystems. Sustainability 2024, 16, 1240. https://www.mdpi.com/2071-1050/16/3/1240

Agroclimatic classification identifies zones for efficient use of natural resources leading to optimal and non-optimal crop production. The aim of this paper is the development of a methodology to determine sustainable agricultural zones in three Mediterranean study areas, namely, “La Mancha Oriental” in Spain, “Sidi Bouzid” in Tunisia, and “Bekaa”...

Future changes in drought characteristics in Greece were investigated using dynamically downscaled high-resolution simulations of 5 km. The Weather Research and Forecasting model simulations were driven by EC-EARTH output for historical and future periods, under Representative Concentration Pathways 4.5 and 8.5. For the drought analysis, the standa...

AquaCrop is a well-known water-oriented crop model. The model has been often used to simulate various crops and the water balance in the field under different irrigation treatments, but studies that relate AquaCrop to fertilization are rare. In this study, the ability of this model to simulate yield and the water balance parameters was investigated...

Risk assessment constitutes the first part within the risk management framework and involves evaluating the importance of a risk, either quantitatively or qualitatively. Risk assessment consists of three steps, namely risk identification, risk estimation and risk evaluation. Nevertheless, the risk management framework also includes a fourth step, i...

Το βιβλίο αφορά στην δημοσίευση των παρουσιάσεων και των συμπερασμάτων - προτάσεων από τα πρακτικά των τριών διαδικτυακών επιστημονικών (03-18-21/3/2021) ημερίδων του Πράσινου Ινστιτούτου για τις παραγωγικές αναδασώσεις, οι οποίες μπορούν να δημιουργήσουν ταυτόχρονα θέσεις εργασίας με αναζωογόνηση των Αγροδασικών συστημάτων της Ελλάδας και της Ευρώ...

Agroforestry and small-scale traditional farming systems as well as multi- functional forest landscapes survived in many rural areas in Europe (both in mountains and islands) that escaped the large scale agricultural transformation that has been supported by the EU Common Agricultural Policy (CAP). How can we build a more resilient rural economy in...

Natural and anthropogenic causes jointly lead to land degradation and eventually to desertification, which occurs in arid, semiarid, and dry subhumid areas. Furthermore, extended drought periods may cause soil exposure and erosion, land degradation and, finally, desertification. Several climatic, geological, hydrological, physiographic, biological,...

To achieve sustainable development, detailed planning, control and management of land cover changes that occur naturally or by human caused artificial factors, are essential. Urban managers and planners need a tool that represents them the information accurate, fast and in exact time. In this study, land use changes of 3 periods, 1994-2002, 2002-20...

Harvesting water for future usage should be the prime concern of human beings. The variety of Internet of Things (IoT) technologies in water harvesting techniques will lead to a fruitful solution in determining the parameters associated with water harvesting anytime and anywhere. This technology helps the user to find the topographical conditions o...

Harvesting water for future usage should be the prime concern of human beings. The variety of Internet of Things (IoT) technologies in water harvesting techniques will lead to a fruitful solution in determining the parameters associated with water harvesting anytime and anywhere.

Knowledge of the nature of seasons and months in terms of the fire risk is very important in environmental planning, land management and forest resource management in order to achieve the sustainable development. One of the applications of remote sensing in this regard is the continuous monitoring of the zone to detect changes. Currently, the veget...

Harvesting water for future usage should be the prime concern of human beings. The variety of Internet of Things (IoT) technologies in water harvesting techniques will lead to a fruitful solution in determining the parameters associated with water harvesting anytime and anywhere. This technology helps the user to find the topographical conditions o...

Conservation planning is becoming necessary day by day, mainly due to the current weather challenges. Maintaining ground cover, reducing of soil disturbance, and application of barriers are examples of these methods. Grass is the most common plant chosen for this purpose. This chapter covers the significant attention that has been given to Vetiveri...

Monitoring the inter-annual land cover evolution is considered of crucial importance at global level, since it may reveal significant changes across the Earth surface. Primary aim of the paper is to explore the spatiotemporal changes occurred in a highly touristic region which hosts a diversity of high-value natural resources (forests, coastal land...

To achieve sustainable development, detailed planning, control and management of land cover changes that occurs naturally or by human caused artificial factors, is essential. Urban managers and planners need a tool that represents them the information accurate, fast and in exact time. In this study, land use changes of 3 periods 1994-2002, 2002-200...

Risk assessment constitutes the first part within the risk management framework and involves evaluating the importance of a risk, either quantitatively, or qualitatively. Risk assessment consists of three steps, namely risk identification, risk estimation and risk evaluation. Nevertheless, the risk management framework also includes a fourth step,...

Forest fires are a natural phenomenon which might have severe implications on natural and anthropogenic ecosystems. Future projections predict that, under a climate change environment, the fire season would be lengthier with higher levels of droughts, leading to higher fire severity. The main aim of this paper is to perform a spatiotemporal analysi...

The development of a reliable methodology for the selection of optimal sites for weather radar installation is presented in this paper. The proposed methodology is based on the combination of geographic information systems (GIS) and multi-criteria decision making (MCDM) methods. The Algerian central north region is selected as a case study. Six con...

Natural disasters have significant impact on several sectors of the economy, including agriculture. Moreover, under climate uncertainty, the role of several sectors of the economy, such as agriculture, as a provider of environmental and ecosystem services, is expected to further gain importance. Indeed, increasing climate variability and climate ch...

Floods as diachronic and international phenomena affect numerous people, buildings and infrastructure. Throughout human history, floods are the most lethal and have caused more economic losses than other natural disasters. In this review, the history of floods is considered focusing in ancient Greece since the early Bronze Age. Ancient Greeks avoid...

It is recognized that the Earth’s climate is undergoing changes in response to natural variability, which include an increase in the concentrations of greenhouse gases and aerosols, as well as variability in solar radiation. Climate change is largely originated from anthropogenic activities and poses significant risks to human and natural systems....

Floods as diachronic and international phenomena affect numerous people, building and infrastructure. Throughout human history, floods are the most lethal and have caused more economic losses than other natural disasters. In this review the history of floods in ancient Greece since the early Bronze Age is presented. Generally, ancient Greeks avoide...

Vegetation indices based on satellite images, such as the normalized difference vegetation index (NDVI), have been used in countries like the USA, Canada and Spain for damaged pasture and forage insurance over the last few years. This type of agricultural insurance is called satellite-index-based insurance (SIBI). In SIBI, the occurrence of damage...

Compound channels are hydraulic sections that consist of two parts including the main channel and the floodplain. The main channel conveys the usual runoffs and the basic discharge that often flows in the river. Predicting the flow characteristics in the prismatic compound channels includes the effect of the interaction between a fast flow in the m...

Compound channels are hydraulic sections that consist of two parts including the main channel and the floodplain. The main channel conveys the usual runoffs and the basic discharge that often flows in the river. Predicting the flow characteristics in the prismatic compound channels includes the effect of the interaction between a fast flow in the m...

To achieve sustainable development, detailed planning, control and management of land cover changes that occurs naturally or by human caused artificial factors, is essential. Urban managers and planners need a tool that represents them the information accurate, fast and in exact time. In this study, land use changes of 3 periods 1994-2002, 2002-200...

Lacking adequate supervision on quality of state wastewater treatment plants causes these materials to enter the environment raw and in most cases with no consolidation and cause lots of losses to the natural environment. Samples: Samples were prepared in plastic cylinders with nearly 14 cm diameter and 50 cm height. Silica sand was poured into cyl...

Lacking adequate supervision on quality of state wastewater treatment plants causes these materials to enter the environment raw and in most cases with no consolidation and cause lots of losses to the natural environment. Samples: Samples were prepared in plastic cylinders with nearly 14 cm diameter and 50 cm height. Silica sand was poured into cyl...

Agriculture is mainly impacted by water availability. Differences in climate conditions and the appearance of severe events, like droughts, has a significant imprint on local, regional and global agricultural productivity. The goal of this paper is to present remotely sensed approaches for water availability and requirements in vulnerable agricultu...

Reduction of water constructions and installations problems, improvement of construction life, provision, transference, distribution, purification and reservation of water are of the most important matters in urban culture due to the importance of drinkable water supply for cities and villages of the country, considering the increase of need in con...

Vegetation indices based on satellite images, such as Normalized Difference Vegetation Index (NDVI), have been used in countries like USA, Canada and Spain for damaged pasture and forage insurance for the last years. This type of agricultural insurance is called satellite index-based insurance (SIBI). In SIBI, the occurrence of damage is defined th...

Reduction of water constructions and installations problems, improvement of construction life, provision, transference, distribution, purification and reservation of water are of the most important matters in urban culture due to the importance of drinkable water supply for cities and villages of the country, considering the increase of need in con...

In this article, the figure of passive systems in modern plans has been considered. Actuality, some of these Reservoirs are offered to be made inside a crowd area without having an exclusion area. However, it may be arduous or inconceivable to incorporate passive systems largely in large size reservoirs, but could be well fit into tiny and mediocre...

Sometimes roads and streets in the cities and villages of the country are witnessing numerous excavations by institutions and municipal and service organizations, including municipalities, power departments, telecommunications, and more. These drills are new for various reasons, such as the establishment of pipelines for water transport, sewerage,...

Knowledge of the nature of seasons and months in terms of the fire risk is very important in environmental planning, land management and forest resource management in order to achieve the sustainable development. One of the applications of remote sensing in this regard is the continuous monitoring of the zone to detect changes. Currently, the veget...

Evapotranspiration plays a fundamental role in agricultural water management. Its calculation requires weather data, such as radiation, which are often not available and should be estimated indirectly. This study employed the Ref-ET software for estimating radiation for the period of 1970-2011 under two different climates of Rasht and Isfahan. Resu...

The quantity of freshwater available per person in the world has been proceeded to decrease due to a combination of factors, including population increase, water pollution, inadequate planning and management of transboundary water, and inefficient operation of water supply and distribution systems. There is a direct water source to cease increasing...

The development of a reliable methodology for the selection of optimal sites for weather radar installation is presented in this paper. The proposed methodology is based on the combination of geographic information systems (GIS) and multi-criteria decision making (MCDM) methods. The Algerian central north region is selected as a case study. Six con...

Self-cleaning, as a well-known solution for various applications, has been the centre of attention amongst scientists. One of the properties that can be discussed in this scope is the application of various materials for different purposes. This covers a wide range of solar cell devices to building materials and indoor applications. Besides cost as...

Improvement in Civil Engineering and developing industries, is due to instant need for constructing materials whit new and efficient executive proportions. Polymer concrete is new combination which is first constructed in United States since 1950. One of the most important reasons for developing polymer concrete could be known the Portland concrete...

Due to the reduction of groundwater resources, the artificial recharge of these resources through the reuse of treated wastewater (modified water) is an efficient way to tackle the problem. Some of the most important goals to be achieved regarding such a situation are the development of underground resources, building barriers to help avoid the pen...

Water scarcity and water availability put significant constraints on social and economic development, as well as deteriorate the quality of life. Today, the problem of water scarcity is the adverse result of ineffective water resources management and policies, as well as the unavailability of water in arid and semiarid countries. The causes for wat...

In order to investigate the effects of using sewage sludge and other municipal and agronomical wastes on soil microbial contamination, four types of organic fertilizers including sewage sludge, animal manure, waste compost and mixtures of wheat straw and alfalfa in greenhouse experiments in the form of completely randomized designs Evaluated. Inves...

Nowadays with concern of water resources reduction, it is more common to use other resources such as filtered sewage using in irrigation and agriculture. Although this solution is the sub tree of a stable management of water resources, but with the researches that have been made by the scientists, it has a bad influence and would cause the poisonin...

Increasing water consumption has increased using of synthetic nutritional methods for enriching groundwater resources. Artificial feeding is a method that can save excess water for using in low level water time in underground. The purpose of this study is to evaluate the performance of the flood dispersal and artificial feeding system in the Red Ga...

Physiographic parameters have a significant effect on the hydrological characteristics and water regime of the catchment area and are therefore important that there is a relationship between them and the flowing waters of the area and recognizing these physiographic properties in one area and having information about weather conditions in the area,...

While climate change occurs over time and place. The global climate image stagnated over the last 2000 years. Therefore, the current desirability phenomenon should be attributed to human intervention and the application of new technology, not to drought. Although this is not the reason why the long-term drought has not accelerated desertification....

In our country, in addition to economically significant costs of wasting water, which the government should pay, and our country has limited water resources. Therefore, identifying ways of occurrence of water losses and providing solutions to these problems will be a great challenge for the newly created water and wastewater industry in the country...

Sometimes roads and streets in the cities and villages of the country are witnessing numerous excavations by institutions and municipal and service organizations, including municipalities, power departments, telecommunications, and more. These drills are new for various reasons, such as the establishment of pipelines for water transport, sewerage,...

Cyclones are monolithic and instable systems in which the air pressure is low, the air flow is ascending and the wind direction in the northern hemisphere is counter clockwise. Due to vertical movement of the air in cyclones, the possibility of the appearance of clouds, precipitation and even a thunderstorm is provided. In this research, in order t...

Sustainable security and development by damage reduction methods in areas with water shortage of the country can play a very effective role in the development of aquatic environments, as it is one of the indicators for sustainable development of clean and healthy water supply that it is possible to neutralize its effects when water damage is reduce...

The method based on separation of the earth & structure. In this method applied force will be decreased during earthquake due to separation of structure & earth by making base of structure or floors flexible and applying energy dampers component & separator layer usually have a higher natural period than fixed support natural period which cause the...

The relationship between crop production and amount of evapotranspiration is very important to agronomists, engineers, economists, and water resources planners. These relationships are often determined using classical least square regression (LSR). However, one needs high amount of samples to determine probability distribution function. Linear regr...

Seepage problem and channel transition efficiency is one of the most important issues in managing and exploiting irrigation networks. Seepage rate should be minimized in the design and construction of irrigation channels. Anyway several methods have been represented to calculate seepage rate. Some methods that are numeral have their own complexity,...

The relationship between crop production and amount of evapotranspiration is very important to agronomists, engineers, economists, and water resources planners. These relationships are often determined using classical least square regression (LSR). However, one needs high amount of samples to determine probability distribution function. Linear regr...

The method based on separation of the earth & structure. In this method applied force will be decreased during earthquake due to separation of structure & earth by making base of structure or floors flexible and applying energy dampers component & separator layer usually have a higher natural period than fixed support natural period which cause the...

Sediments are solid, fragmented particulate matter (silt, sand, and gravel), which are transported and deposited by physical processes such as water, wind, and ice. Sediments consist of loose, solid particles originating from the weathering and erosion of rocks, or chemical precipitation from solution, including secretion by organisms in water. Sed...

Self-cleaning, as a well-known solution for various applications, has been the centre of attention amongst scientists. One of the properties that can be discussed in this scope is the application of various materials for different purposes. This covers a wide range of solar cell devices to building materials and indoor applications. Besides cost as...

Self-cleaning, as a well-known solution for various applications, has been the centre of attention amongst scientists. One of the properties that can be discussed in this scope is the application of various materials for different purposes. This covers a wide range of solar cell devices to building materials and indoor applications. Besides cost as...

Climate intelligence denotes compatibility ability of a land’s people in contrast to the good and bad climate of that region. Climate intelligence in old and historic cities of the country leads to culture, buildings, and structures, which are famous as tangible and intangible heritage. Around the old Caravansary of Gaz town, where surrounding the...

Droughty areas formed about 1/3 of earth’s surface. The rate of rainfall in these areas is low and rate of evaporation is high that it sometimes arrives to 40 times more than rainfall. With this situation, droughty areas are in difficulty of water sources. Since surface waters are not trustable in these areas (because of low and irregular rainfall)...

Drought areas formed about 1/3 of earth’s surface. The rate of rainfall in these areas is low and rate of evaporation is high that it sometimes arrives to 40 times more than rainfall. With this situation, drought areas are in difficulty of water sources. Since surface waters are not trust-able in these areas (because of low and irregular rainfall),...

Many construction buildings and Structural barrier members that was built before 90s in USA, they weren't designed for Seismic resistance until Federal Emergency Management Agency FEMA started to do seismic evaluation and rehabilitation and suggested reinforcement methods. In this article we evaluate FRP sheet reinforcement.

Agriculture is highly affected by environmental conditions and the assessment of the agroclimatic potential is necessary for sustainability and productivity. The climate is among the most important factors that determine the agricultural potentialities of a region and the suitability of a region for a specific crop, whereas the yield is determined...

In order to design and construct hydraulic structures, such as dams, there is a need to determine the amount of river discharge. In ungauged watersheds, it is necessary to calculate their inflows through hydrological simulation. SWAT is one of the numerical models that is widely used for such purposes. For calculating the basin discharge, the model...

Sediments are solid, fragmented particulate matter (silt, sand, and gravel), which are transported and deposited by physical processes such as water, wind, and ice. Sediments consist of loose, solid particles originating from the weathering and erosion of rocks, or chemical precipitation from solution, including secretion by organisms in water. Sed...

This article shows a pliable unified modeling scheme applying a materially based, distributed, integrated hydrological and water quality modeling organization. It is need to analyze the unsteady flow in open channels network is done using the computer packages, because solving the Saint-Venant equation is very difficult and sophisticated spatially...

This article shows a pliable unified modeling scheme applying a materially based, distributed, integrated hydrological and water quality modeling organization. It is need to analyze the unsteady flow in open channels network is done using the computer packages, because solving the Saint-Venant equation is very difficult and sophisticated spatially...

Drought is one of the most devastating natural disasters that often occurs in different parts of Iran. In this research, in order to monitor the drought in Karkheh watershed, two standard rainfall and rainfall decimals were used and rainfall data of 12 meteorological stations was used. Homogeneity of rainfall data was investigated by sequencing tes...

The historical and old texture of the cities of our country, which often makes the main and primary core of these cities, in one side, is the part of the cultural and historical heritage of those cities, which preserving, improving and also functional empowering of them are inevitable. And on the other side, most of these tissues after the time, du...

Domestic, industrial and agricultural sewage contaminates the limited groundwater reservoirs, and makes water extraction more cumbersome in numerous parts of Iran. Impurity was affected by effluent depletion wealthy in ammonia. The alteration in ammonia condensation was mostly governed by the immigration of the contamination plume under nitrificati...

Domestic, industrial and agricultural sewage contaminates the limited groundwater reservoirs, and makes water extraction more cumbersome in numerous parts of Iran. Impurity was affected by effluent depletion wealthy in ammonia. The alteration in ammonia condensation was mostly governed by the immigration of the contamination plume under nitrificati...

The method based on separation of the earth & structure. In this method applied force will be decreased during earthquake due to separation of structure & earth by making base of structure or floors flexible and applying energy dampers component & separator layer usually have a higher natural period than fixed support natural period which cause the...

Variable-rate application (VRA) addresses in-field variation in soil nitrogen (N) availability and crop response, and as such is a tool for more effective site-specific management. This study assessed the performance of a VRA system for on-the-go delivery of granular fertilizer in 7-m wide and 200-m long strips of a 2.4-ha wheat field. A randomized...

In this article, the figure of passive systems in modern plans has been considered. Actuality, some of these Reservoirs are offered to be made inside a crowd area without having an exclusion area. However, it may be arduous or inconceivable to incorporate passive systems largely in large size reservoirs, but could be well fit into tiny and mediocre...

In this article, the figure of passive systems in modern plans has been considered. Actuality, some of these Reservoirs are offered to be made inside a crowd area without having an exclusion area. However, it may be arduous or inconceivable to incorporate passive systems largely in large size reservoirs, but could be well fit into tiny and mediocre...

The method based on separation of the earth & structure. In this method applied force will be decreased during earthquake due to separation of structure & earth by making base of structure or floors flexible and applying energy dampers component & separator layer usually have a higher natural period than fixed support natural period which cause the...

Every once in a while in sidewalks and streets of our country’s cities and even rural areas, we are witnessing various drillings from different city organizations and institutes including municipalities, electricity companies, and etc. These drillings that are being done for different reasons such as creating pipeline networks for transferring wate...

To achieve sustainable development, detailed planning, control and management of land cover changes that occurs naturally or by human caused artificial factors, is essential. Urban managers and planners need a tool that represents them the information accurate, fast and in exact time. In this study, land use changes of 3 periods and 2023 were asses...

Nowadays, daily life intensively depends on public services. Increasing population and urbanization take humans away from environment which may lead to chaos in usage of city lands. Consequently, human is in trouble using public services and facilities including green spaces. Isfahan, one of the metropolitans, has 18 m2 green spaces per person whil...

The exact estimating of snow cover surface and the corresponding equivalent volume of snow water is considered as one of the key and fundamental operations in the field of water resources management, especially in areas where snowfall has a large contribution to atmospheric precipitation. ARCGIS and ENVI4.8 software are used for image processing an...

In this paper, the processes of precipitation, surface flow characteristics and groundwater table status in arid and desert regions have been investigated and compared with wet areas. Local spatial distribution of rainfall on a local scale is significantly affected by the reaction of atmospheric processes. From the qualitative point of view, these...

The exact estimating of snow cover surface and the corresponding equivalent volume of snow water is considered as one of the key and fundamental operations in the field of water resources management, especially in areas where snowfall has a large contribution to atmospheric precipitation. ARCGIS and ENVI4.8 software are used for image processing an...

Today, due to the growing population on the one hand and the shortage of drinking water resources on the other the use of water recycling has grown dramatically. The use of artificial wetlands is one of the wastewater treatment methods its output can be used without problems in the environment or in agriculture. An important issue in these systems...

Nowadays, daily life intensively depends on public services. Increasing population and urbanization take humans away from environment which may lead to chaos in usage of city lands. Consequently, human is in trouble using public services and facilities including green spaces. Isfahan, one of the metropolitans, has 18 m2 green spaces per person whil...