Aleksandar Dordje Valjarevic

University of Belgrade · Faculty of Geography

There are about 240 geothermal occurrences with 60 commercial spas included in, which are spread throughout the territory of Serbia. The majority of springs and other surface manifestations are located along the south-eastern edge of the country. Three spas Lukovska, Prolom and Kursumlijska are with the highest geothermal potential and balneology u...

Although the Toplica region is situated in a forest-rich part of the Republic of Serbia, the region’s four municipalities are not equally forested. Forests are an important resource for economic activities and the existence of flora and fauna, both globally and in the Republic of Serbia. Many initiatives around the world intend to protect and renew...

With the help of satellite data and numerical geographical information system (GIS) methods, the total capacity of dew volume on the entire territory of the Republic of Serbia was estimated. Multicriteria GIS analysis and satellite detections with the support of methods such as kriging and semi-kriging gave satisfactory results in the present resea...

In a fast growing region of Middle East and with rapid depletion of fossil groundwater, possibilities for dew utilization as a limited renewable water resource play an important role in the water management of the United Arab Emirates. Despite projected changes in air temperature and rainfall, geographical and topographical features of the UAE show...

The Updated Trewartha climate classification (TWCC) at global level shows the changes that are expected as a consequence of global temperature increase and imbalance of precipitation. This type of classification is more precise than the Köppen climate classification. Predictions included the increase in global temperature (T in °C) and change in th...

Tufa accumulations from the Gostilje River Basin and the Sopotnica River Basin in SW Serbia are represented by both active and fossil tufa precipitates. The aim of this study is to distinguish and describe different tufa facies and to determine the environmental conditions, based on stable isotope data. We also compare our analysis with other tufa...

Forests serve as a balance in the preservation of ecosystems on the planet. Tropical forests, which represent the lungs of the planet, must be investigated through time. Spatial analysis is of great significance, since it can recognize all the changes related to tropical forests and all other types of forest biomes (Rudel, 2005). Numerical analyses...

The Western Balkans (WB) region is highly prone to water erosion processes, and therefore, the estimation of rainfall erosivity (R-factor) is essential for understanding the complex relationships between hydro-meteorological factors and soil erosion processes. The main objectives of this study are to 1) estimate the spatial-temporal distribution R-...

Adequate disposal of municipal solid waste (MSW) is one of Serbia’s most complex environmental challenges. The problem is more serious in urban areas, since large amounts of waste are disposed of in locations that do not comply with environmental, technical, and socio-economic standards. Such is the case for the city of Kraljevo, where about 116,00...

The investigation of weather properties and clouds distribution in the stratosphere is rare, but essential for science. In this research, twenty years of satellite recordings showed the properties of stratospheric clouds approved by GIS (Geographical Information System) and Remote sensing (RS) techniques. This type of clouds covered a small area in...

This research represents the results of field work conducted in the period from March 29 to May 29. 2020, to determine and record the location of illegal waste disposal sites in the municipalities of Istočno Novo Sarajevo and Istočna Ilidža. The location of illegal waste disposal sites was analyzed based on two groups of factors: space exposure and...

Landslides are natural hazards that can cause catastrophic life losses and damage to infrastructures and communities. In Iran, landslide exposure has been predominantly increasing in the Zagros Mountains, notably along the lifelines, such as road networks. Therefore, this study aimed to investigate the landslide vulnerability of a 6682 km road netw...

Using evidence of the spatial trajectory of the virus in the past can help us predict spatial patterns in the future. Geospatial analysis and GIS (Geographical Information Systems) may accelerate the spatial analysis of virus spatial trajectories. The different types of transportation have accelerated the transmission of the virus. One way to find...

Clouds play an important role in maintaining the balance in the environment. Cloudiness can influence numerous important ecological drivers, including growth, survival and distribution of plants. The cloud cover dynamics and distribution may provide key information for delineating various types of plant and species distribution. During a year, diff...

Fog water collection provides a sustainable resource for watering of crops. The Jizan region is one of the smallest states in the Kingdom of Saudi Arabia (KSA) but very rich with unique flora, fauna, landscape diversity, and occurrence of fog. According to satellite data from the period between (1991-2021) the average visibility in this fog belt va...

Downscaling and modeling natural disturbances such as the extratropical storms are important for understanding and predicting the behavior of the air flow over complex forested areas, especially in high wind instances that cause damages. Therefore, the rationale of the research was that the windscape of a storm could be reconstructed based on the f...

In urban areas, forest patches and parks are usually the places where people spend most of their time outdoors. Because of poor environmental protection policy and insufficient investment in industry and energy, Serbia is often ranked among the European countries with the greatest environmental pollution. In recent years, ecological protests have b...

In some areas of the world, regional climate change is in good agreement with global climate change. This study brings new information about what defines climate change in the contact area of Adriatic Sea and Southeastern Europe, and conclusions are based on trend analysis of annual and seasonal temperatures in the southern and southeastern parts o...

Snow avalanches are one of the most devastating natural hazards in the highlands that often cause human casualties and economic losses. The complex process of modeling terrain susceptibility requires the application of modern methods and software. The prediction of avalanches in this study is based on the use of geographic information systems (GIS)...

Snow avalanches are one of the most devastating natural hazards in the highlands that often cause human casualties and economic losses. The complex process of modeling terrain susceptibility requires the application of modern methods and software. The prediction of avalanches in this study is based on the use of geographic information systems (GIS)...

Spatial assessment of soil erosion is an important indicator of ecological soil change and global environmental changes. This is especially true for countries with rich forest cover such as Bosnia and Herzegovina. In this study, the risk of soil erosion was assessed using the Revised Universal Soil Loss Equation (RUSLE) model and the impact of chan...

National land-cover maps are essential for the development of the countries as land-use patterns have shifted dramatically throughout the world in the previous decades. With the latest development in the remote sensing community, the power and ease of web-mapping and web-based map and GIS services have increased. This work investigates several data...

The study is focused on diatom communities as indicators of the water quality of aquatic ecosystems. The study included watercourses of the Timok River Basin in eastern Serbia. Sampling of algological material and physico-chemical measurements were conducted at 30 locations in September 2016. Non-metric multidimensional scaling (NMDS) showed that c...

To understand the complex relationships between hydrological and soil erosion processes it is essential to estimate rainfall erosivity (RE) and erosivity density (ED). In this study, we conducted a detailed analysis of the spatial-temporal trends and variability of the RE and ED observing the study area of the central and southern Pannonian Basin....

Given the widespread use of dietary supplements (DS) and herbal products (HP), healthcare professionals (HCPs) will increasingly encounter patients who use these preparations with conventional drugs and who need their services to reduce the consequences of adverse therapeutic outcomes. The aim of our survey was to assess the knowledge and behaviors...

Climate change is one of the largest environmental issues causing hydroclimatological extremes such as floods, droughts, and aridity. The aim of this study is to assess the observed and projected climate changes in Bačka (Serbia). Detailed trend analyses and possible climate scenarios over Bačka has not been presented up to now. In this paper, four...

The contemporary globalized world characterizes the rapid population growth, its significant concentration in cities, and an increase in the urban population. Currently, many socio-cultural, economic, environmental, and other challenges are arising in modern cities, negatively affecting the state of the urban environment, health, and quality of lif...

We propose an improved variant of the accelerated gradient optimization models for solving unconstrained minimization problems. Merging the positive features of either double direction, as well as double step size accelerated gradient models, we define an iterative method of a simpler form which is generally more effective. Performed convergence an...

The persistence of the SARS-CoV-2 virus imposed vaccination passports for traveling in most countries. We investigated psychological factors that predict the intention to vaccinate for travel. In a cross-sectional study, we examined how demographic variables, vaccination status, perceived risk of infection and severity of disease contracted at trav...

World production growth affected a rise in the amount of waste generated. In these circumstances proper waste management becomes a highly important issue. The protection of the environment from degradation requires a multi-dimensional approach to this problem. Integration of multi-criteria decision making with the geographic information systems pro...

In recent years, the interest for safe marine traffic in Europe has been growing. This type of traffic has bad connection with other traffic systems. Europe has central geographical position in the world for many vessel routes. The location of European ports gives the possibility of improving shorelines and traffic near the ports' area. Maritime tr...

The Republic of Moldova has a small territory of 33,843 km2. Due to the increase of temperature in Europe by more than 1.0 °C, the number of drought periods was increased dramatically. Recently, there has been a shift in the climate of Moldova, manifested in the change of precipitation and extreme temperatures. According to this the agricultural se...

The municipality of Štrpce (Southern Serbia) is an area located within Šar Mountain National Park, which is of great ecological importance. Due to the vicinity of settlements, it is necessary to analyze the terrain's susceptibility to natural hazards. The main goal of this research was to determine locations that are highly vulnerable at times of n...

Estimation of rainfall erosivity (RE) and erosivity density (ED) is essential for understanding the complex relationships between hydrological and soil erosion processes. The main objective of this study is to assess the spatial–temporal trends and variability of the RE and ED in the central and southern Pannonian Basin by using station observation...

The municipality of Štrpce (Southern Serbia) is an area located within Šar Mountain National Park, which is of great ecological importance. Due to the vicinity of settlements, it is necessary to analyze the terrain's susceptibility to natural hazards. The main goal of this research was to determine locations that are highly vulnerable at times of n...

This study investigates travel behavior and psychosocial factors that influence it during the COVID-19 pandemic. In a cross-sectional study, using an online survey, we examined changes in travel behavior and preferences after lifting travel restrictions, and how these changes were influenced by exposure to COVID-19, COVID-19 travel-related risk and...

In this study was performed the trend analysis of air surface temperature and precipitation data. Man-Kendall test and GIS analysis were used in the interpretation of the results. The combined approach provides insight into climate dynamics over the past decades over Mačva region (Serbia).

During this research, actual ecological problems were analyzed in the municipality of Rozaje (Montenegro). Rozaje is a municipality in the northeastern part of Montenegro, right on the border with Serbia on one side and the Kosovo Republic on the other. The area of Rozaje is 432 square kilometres with a population of 22 964 (MONSTAT, census of 2011...

The use of weather satellite recordings has been growing rapidly over the last three decades. Determining the patterns between meteorological and topographical features is an important scientific job. Cloud cover analysis and properties can be of the utmost significance for potential cloud seeding. Here, the analysis of the cloud properties was con...

Abstract Serbia is a country rich in geoheritage with eighty geomorphological sites now under protection. Although a canyon, the site of Devil’s Town is a unique geomorphological site in Serbia and deserves special attention. The geotouristic values of Devil’s Town were assessed based on the analysis of its present state and comparison with three s...

The Fruška Gora Mt., as a dominant orographic complex in the Pannonian plain, was selected for a pioneer geodiversity quantification study area due to its unique geology and soil properties. The methodology is based on the geodiversity quantification assessment approach of Serrano and Ruiz-Flaño (Geogr Helv 62:140–147, 2007). It employed a 500 × 50...

The paper presents trends for three categories of variables: average annual, average maximum and average minimum air temperatures. Data was provided by the meteorological yearbooks of the Republic Hydrometeorological Service of Serbia. The main goal of this paper is to detect possible temperature trends in Central Serbia. The trend equation, trend...

This paper points out the possibilities of better exploitation of marine traffic as well as its connection with other kinds of traffic. Special attention is given to the analysis of 1,081 harbors about their availability during the year. The methods and algorithms used in GIS are buffers, cluster, method of interpolations, and network analysis. The...

The Municipality of Štrpce (Southern Serbia) is an area located within the Šar Mountain National Park, and due to its great ecological importance, it was necessary to analyze the terrain susceptibility to the occurrence of natural hazards. The main goal of this research is to determine the locations that are most susceptible to natural hazards (ear...

Romania is one of the countries severely affected by numerous natural hazards, where landslides constitute a very common geomorphic hazard with strong economic and social impacts. The analysed area, known as the "Ciuperca Hill", is located in Oradea (NW part of Romania) and it has experienced a number of landsliding events in previous years, which...

The use of meteorological satellite recordings over the last three decades has increased the possibility of determining the patterns between meteorological elements and relief in a more precise way. Cloud cover can influence numerous important ecological processes including growth, reproduction and survival. In the future, the possibility to define...

After the breakup of the former Republic of Yugoslavia, the number of inhabitants in newly formed state of Serbia has been in constant decrease. On the other hand, the number of urban areas has been growing. One of the main goals of former Socialist Federal Republic of Yugoslavia was the development of all the areas, including the rural ones. In th...

Apstrakt: Geografski informacioni sistem (GIS) i numerička analiza mogu dati zadovoljava-juće rezultate u analizi svojstva saobraćaja. Beograd predstavlja prostor najveće populacije u Republici Srbiji. Ovaj region je podeljeno u 17 opština, neke od njih nisu podjednako poveza-ne saobraćajnom mrežom. U ovom radu smo analizirali svojstva saobraćajne...

he textbook Remote Sensing of the Environment, includes, on the one hand, techniques and processes of recording phenomena on the Earth's surface. Techniques and classifications processes, research methods and verification of detected elements. The textbook aims to enable readers to predict the negative impacts that man and nature have on the enviro...

In December 2019, the virus SARS-CoV-2 responsible for the COVID-19 pandemic was detected in the Chinese city of Wuhan. The virus started to spread from China and dispersed over the rest of the world. In March 2020, WHO (World Health Organization) declared COVID-19 a pandemic. The transmission path of the pandemic was accelerated by different types...

In the last decades, knowledge about the climate has increased significantly. Climate change today is the subject of many sciences, including meteorology, climatology, geology, geography, geophysics, astronomy, etc. The present predictions with updated meteorological data and with data of the number of particles of CO 2 in the troposphere may give...

With the help of satellite data and numerical GIS methods, the total capacity of dew volume on the entire territory of the Republic of Serbia was estimated. Multi-criteria GIS analysis and satellite detections with the support of methods such as Kriging and semi-Kriging gave satisfactory results in this research. After the download of satellite dat...

The end of the XX and the beginning of the XXI century is characterized by increasing pluvial contrasts within the temperate climate in the Panonnian Basin. The soil erosion by water is very complex phenomenon and it is one of the most important causes of degradation of land and a critical environmental hazard in modern times. The authors assessed...

For the purpose of this manuscript, we used the old maps of Europe and of the ecumene, as it was known at the time, in order to establish the ecumene properties, as well as the size of the Mediterranean in the time of Ptolemy. We obtained the coordinates (geographic longitude and latitude) from Ptolemy’s map of ecumene of ancient Mediterranean sett...

Recent climate change has been caused by interaction of natural processes and the anthropogenic factor. In turn, it incites the pronounced natural and socioeconomic changes. It is the air temperature that plays a pertinent role in understanding the climate change problem. Southeast Europe, including Bosnia and Herzegovina (B&H), is highly relevant...

The subject of this paper is to present an investigation of renewable energy potential in one small municipality in south Serbia. Serbia has a relatively small area but a large number of renewable energy resources. This energy is divided into solar, wind, geothermal and waste wood. One municipality on the south east has very large potential for the...

Recent climate changes cause significant natural and socioeconomic consequences. They represent one of the major environmental problems of the late 20 th and early 21 st centuries. Changes in temperature and precipitation play a significant role in understanding climate change issues. They include numerous extreme climatic events such as heat waves...

This paper presents the results of the analyzed trends for three categories of parameters: average annual air temperature (YT), average maximum air temperature (YTx) and average minimum air temperature (YTn) for the Podgorica Meteorological Station in the Republic of Montenegro. The aim of this paper is to present possible climate changes based on...