Ugur Avdan

• Professor
• Eskisehir Technical University

In Southwestern Anatolia, there are numerous active faults on both inland and underwater, which potentially can generate destructive earthquakes. These faults are controlled by the Hellenic arc; one of the most seismically active regions in the world. The primary faults in the region include the Milas fault, Muğla-Yatağan fault, Gökova fault, Beyağ...

The Virtual Geographic Environment (VGEs) is a framework in which real-world information is conveyed and converted into the digital world. It contributes to a better understanding of geographic knowledge by human beings and helps decision-makers by giving them a profound view of geographic concerns like three-dimensional (3D) models. The production...

The study aims to identify the possibility of rainwater harvesting in industrial zones (Eskisehir Organized Industrial Zone (EOIZ), Baksan Industrial Site, Matbaacılar Site, ESTIM Wholesalers Site, Auto Gallery, EMKO Furniture and Woodworks, Teksan Industrial Site, Auto Industrialists and Small Industry, Craft Industrial Site, New Organized Industr...

Advances in Earth observation capabilities and the expanded accessibility of data provide the opportunity to monitor air pollution on a global scale. The Google Earth Engine (GEE) enables the efficient conduct of such large-scale research. This article examines the impact of the COVID-19 pandemic on NO2 emissions at various supranational scales, wi...

Derin öğrenme alanında son yıllarda gerçekleşen atılımın katkısıyla uzaktan algılama görüntülerinde gemi tespiti konusunda önemli ilerlemeler kaydedilmiştir. Özellikle, nesne tespiti ve sınıflandırması için geliştirilen yaklaşımlardan olan konvolüsyonel sinir ağları (CNN) gemi tespiti için de başarılı ve yaygın bir şekilde kullanılır hale gelmiştir...

Global water resources are significantly impacted by climate change, necessitating advanced tools and methodologies for accurate analysis. Although numerous studies have employed the use of Coupled Model Intercomparison Project Phase 6 (CMIP6) models, only a limited number have specifically concentrated on their use in assessing the impacts of clim...

The utilization of satellite remote sensing products is progressively vital in the management of water resources. A critical element for effective and sustainable management of river basins is the monitoring of water availability and demand. This research estimates the monthly and annual components of the water budget for the Amu Darya and the Kizi...

Architectural documentation not only plays a critical role in the conservation of historical structures, but also enables their detailed comprehension of the structure. This study aims to assess the most effective methods for drawing and modeling architectural structures and present their advantages and disadvantages. Measurements play a significan...

Rapid and accurate surveying has always attracted great interest in all scientific and industrial activities that require high-resolution topographic data. The latest automation and advancement in geomatics engineering are remote sensing solutions using Unmanned Aerial Systems (UAS) and Structure from Motion (SfM) with Multi-View Stereo (MVS) photo...

Photogrammetric surveying using unmanned aerial systems (UAS) and structure from motion (SfM) is a rapidly emerging technique that has been widely used as a valuable research tool in geodesy and related disciplines. We studied surveying and three-dimensional (3D) modeling based on UAS and SfM. In particular, we focus on the accuracy and quality of...

The Western Anatolian Extensional Province is one of the regions where seismicity is most intense, not only in the Anatolian Plate but also in the world. The focal mechanism solutions of earthquakes occurring in the instrumental period in this area indicate normal fault zones having different directions in the region. The Dinar Fault Zone, which i...

The focal mechanism solutions of the earthquakes that occurred in the instrumental period in the Western Anatolia Extensional Province indicate normal fault zones in different directions in the region. Dinar Fault Zone, located in the easternmost part of this region, is an important location containing active faults. The Dinar Fault Zone, which pro...

Monitoring trees is necessary to manage and take inventory of forests, monitor plants in urban areas, distribute vegetation, monitor change, and establish sensitive and renewable agricultural systems. This study aims to automatically detect, count, and map apricot trees in an orthophoto, covering an area of approximately 48 ha on the ground surface...

With the increase in population in cities, economic, social, and environmental problems continue to increase, and it is thought that the microclimatic conditions created by these problems will cause more environmental problems. One of the factors affecting the urban climate in urban areas is urban geometry. The climate of a region changes due to th...

The extraction of building inventory information is vital for damage assessment and planning and modelling studies. In the last few years, the conventional data extraction for building inventory was overcome using various remote sensing data and techniques. The main objectives of this study were to supply the necessary data for the structural engin...

With the increased urbanization, the rise of the manufacturing industry, and the use of fossil fuels, poor air quality is one of the most serious and pressing problems worldwide. The COVID-19 outbreak prompted absolute lockdowns in the majority of countries throughout the world, posing new research questions. The study’s goals were to analyze air a...

As a significant environmental problem, soil salinity should be timely and accurately mapped and monitored. In recent years, remote sensing data and techniques have been widely used for soil salinity estimation. However, with the difference in the sensors' characteristics, satellite-based prediction of soil salinity remains highly uncertain. This s...

Sentinel-2 and Sentinel-3 are two remote sensing satellites implemented by the European Space Agency for global observation. The temporal resolution of Sentinel-2 images and the spatial resolution of Sentinel-3 images may not be sufficient for local and precise monitoring. With spatiotemporal image fusion of Sentinel-2 and Sentinel-3 sensors, image...

Salinity is one of the most critical problems for agricultural lands. Soil salinity should be monitored with fast, economical and accurate data and methods. In this study, soil salinity was estimated using remote sensing data and machine learning algorithms, where fıve different methods were used, and the results were compared. As a study area, Alp...

With the developing technology and automation, automatic labelling of images is of great importance for automatic mapping. However, the most significant disadvantage of this method is that the classes’ labels cannot be generated automatically. In the current remote sensing literature, understanding and automatically labelling clusters obtained from...

With the increase in population in cities, economic, social and environmental problems continue to increase, and it is thought that the microclimatic conditions created by these problems will cause more environmental problems. One of the factors affecting the urban climate in urban areas is urban geometry. The climate of a region changes due to the...

Satellite remote sensing products are becoming increasingly important in water resources management. Monitoring water availability and demand within a basin is a primary requirement of effective and sustainable river basin management. In this study, monthly and annual water budget components of the Kizilirmak River Basin were estimated from satelli...

Forest area losses are one of the most significant changes in land cover. These losses negatively affect ecosystems and cause severe economic and social life problems. It is necessary to monitor the process carefully and analyze the effects well to minimize all these negative effects in forest land losses and improve the development in urban areas...

Urban areas of major cities in developing countries are expanding rapidly due to rapid population growth and industrialization. Determining the reasons for rapid urbanization and the amount of urban area that will be needed in the future is important for the planned growth of these cities. In this study, the LU/LC change of Eskisehir city center th...

Anavarza’da Toprak Ve Tarım Soıl And Agrıculture In Anavarza Selim Kapur, Mehmet Ali Çullu, Nurettin Çelmeoğlu, Mahmut Dingil, Veysel Erdem Bozdoğangil, Erhan Akça Kilikya Bölgesi Antik Anavarza Kentinin Yapı Ve Taş Eserlerinin Petrografik İncelenmesi The Petrographıc Study Of The Buıldıngs And Stone Artıfacts Of The Ancıent Anavarza Of Cılıcıa Reg...

Türkiye’de SARD-CoV-2 virüsünün yayılımını durdurmak amacıyla 15 Mart 2020 yılı ile 01 Mart 2021 tarihleri arasında kısmi ve tam kapanmalar uygulanmıştır. Ancak bu süre zarfında sanayi bölgesinde bulunan fabrikalar çalışmaya devam etmiştir. Bu durum popülasyon hareketliliğinin hava kalitesi üzerindeki etkilerini sınırlarken sanayi bölgelerinin hava...

Drought is defined as the amount of precipitation in a region less than the amount of evaporation. Human facts such as population growth, industrialization, deforestation, and uncontrolled irrigation in agriculture are among the factors that cause drought. Today, with the increase of human activities such as population growth and industrialization,...

Aralık 2019'da, COVID-19 olarak da bilinen şiddetli akut solunum sendromu koronavirüsünün (SARS-CoV-2) ilk vakaları Çin'in Wuhan kentinde ortaya çıkmıştır. 2020'nin başlarında virüs, önce İtalya'da ardından Avrupa'da hızla yayılmıştır. İnsan yaşamını tehdit eden bu salgın karşısında tüm dünyada pandeminin yayılımını durdurmak için birtakım önlemler...

With the developing technologies, the use of unmanned aerial vehicles’s (UAV) is increasing in all areas. Compared with the conventional photogrammetry and remote sensing sensors, UAVs are more convenient to collect data for small areas. In this study, the accuracy of UAV products was investigated in the archeological area of Eskişehir Şarhöyük. In...

The negative impacts of fossil fuel and nuclear energy for generating electricity on the environment have created a need to find and use clean, renewable, and sustainable energy resources such as wind, solar, and geothermal resources. This study aims to locate the best suitable locations for siting wind farms in Herat province/Afghanistan with a ge...

With the increase of anthropogenic activities, the importance of the essence of life, water, proportionally continues to rise. The effective use of water is vital as an important role in socio economic development of nations. Thus, frequent water bodies monitoring is a crucial part of their sustainable management. As remote sensing data is useful i...

Soil salinity is a major threat to the continuity of sustainable agriculture and food provision and the soil structure deterioration. In this context, determining, reducing and managing soil salinity is very important for creating sustainable modern agriculture. Determining soil salinity is generally carried out in the laboratory environment and de...

Highly detailed topographic surveying at minimal cost and effort has always been one of the developing areas of scientific interest. Image-based remote sensing solutions using unmanned aerial systems (UAS) and structure from motion (SfM) with multi-view stereo (MVS) photogrammetry are the latest automation and advancement in surveying engineering t...

The human increases environmental pressures and consumes resources. Therefore; Landscapes are also changed by natural events or human beings over time. Landscape ecology examines these changing relationships and takes landscape as a level and system within the concept of hierarchical order. Landscape structure analysis is an important method used i...

Impervious surface is mainly defined as any surface which water cannot infiltrate the soil. Due to the impact of urban impervious surfaces (UIS) on environmental issues, the amount of impervious surfaces has been recognized as the most significant index of environmental quality. Detection and analysis of impervious surfaces within a watershed is on...

Soil salinity is a major threat to the continuity of sustainable agriculture and the provision of food as well as the deterioration of the structure of the soil. In this context, determining, reducing, and managing soil salinity is very important for the process of creating sustainable modern agriculture. The process of determining soil salinity is...

In this study, we compared the performance of tree-based classification algorithms – Random Forest (RF), Rotation Forest (RotF), J48, The Alternating Decision Tree (ADTree), Forest by Penalising Attributes (Forest PA), Logical Analysis of Data Algorithm (LADTree) and Functional Trees (FT) – for mapping burned forest areas within the Mediterranean r...

The Aral Sea was the fourth largest lake in the world before 1960. Reduction of water resources and the growth of water intake and reservoirs in the source rivers have severely desiccated the Aral Sea. This study aimed to model the spatiotemporal and surface temperature changes of the Aral Sea in the period 1986–2017 using the Landsat multi-tempora...

Building extraction from high-resolution aerial imagery plays an important role in geospatial applications such as urban planning, telecommunication, disaster monitoring, navigation, updating geographic databases, and urban dynamic monitoring. Automatic building extraction is a challenging task, as the buildings in different regions have different...

With the rapid urbanization and industrialization, people become more aware of the value of the green spaces. Green cadastre is an optimal solution to protect and preserve green areas in both urban and rural areas as it contributes to the proper maintenance of all green areas including trees and shrubs. In the last few years, the idea of green cada...

Unsupervised classification algorithms are methods for the analysis of remotely sensed images. Since these methods do not include a training phase, they require less time to apply and are more practical to use. Traditional unsupervised classification methods work with parameters given by the user, such as the number of classes, the stop criterion o...

Forest fires cause a lot of damage in Turkey, due to the geographical location, high temperatures, and low humidity levels. Accurate determination of burned forest areas is crucial for correct damage assessment studies, fire risk calculations, and review of the forest regeneration processes. In this study, we compare the performances of unsupervise...

Tree detection and counting have been performed using conventional methods or high costly remote sensing data. In the past few years, deep learning techniques have gained significant progress in the remote sensing area. Namely, convolutional neural networks (CNNs) have been recognized as one of the most successful and widely used deep learning appr...

Many freshwater bodies are shared by two or more countries. Managing shared water can cause conflicts over freshwater rights and may become a brake on development for some struggling nations. Frequent water bodies monitoring is a crucial part of their sustainable management. As remote sensing data can be useful in monitoring water bodies, in this s...

With the rapid urbanization and industrialization, people become more aware of the value of the green spaces. Green cadastre is an optimal solution to protect and preserve green areas in both urban and rural areas as it contributes to the proper maintenance of all green areas including trees and shrubs. In the last few years, the idea of green cada...

Highly detailed topographic mapping at minimal cost and effort has always been one of the developing areas of scientific interest. Image-based remote sensing solutions using Unmanned Aerial Systems (UAS) and Structure from Motion (SfM) with MultiView Stereo (MVS) photogrammetry are the latest automation and advancement in surveying engineering. The...

Remotely sensed data can reinforce the abilities of water resources researchers and decision-makers to monitor water quality more effectively. In the past few decades, remote sensing techniques have been widely used to measure qualitative water quality parameters. However, the use of moderate resolution sensors may not meet the requirements for mon...

In water resources management, remote sensing data and techniques are essential in watershed characterization and monitoring, especially when no data are available. Water quality is usually assessed through in-situ measurements that require high cost and time. Water quality parameters help in decision making regarding the further use of water-based...

In this study, we focused on a normal fault scarp exhumed within an ancient harbor city, Knidos, located Aegean coast of SW Turkey. This part of Aegean Sea is an extensional region at the back-arc region of the Hellenic Trench. We have made the inversion of the 36Cl profile to determine the age and the slip of the events that have exhumed the fault...

Due to the high spatial heterogeneity and temporal variability, wetlands are one of the most difficult ecosystems to observe using remote sensing data. With the additional Sentinel-2 vegetation red-edge bands, an improvement of the vegetated classes classification is expected. In order to investigate the influence of the Sentinel-2 red-edge bands,...

Fresh water is a fundamental resource, integral to all ecological and societal activities. The geographical fact that many sources of fresh water are share by two or more nations, has led to the geopolitical reality of disputes over shared water resources. Conflicts over water rights may become a brake on development for some struggling nations, th...

With rapid population growth, both urbanization and transportation affect air pollution, population health, and global warming. A number of air pollutants are released from industrial facilities and other activities and may cause adverse effects on human health and the environment. One of the biggest air pollutants, nitrogen dioxide (NO2), is ma...

ZET Nüfus artışına bağlı olarak meydana gelen çarpık kentleşme sonucunda mekânların fiziksel kalitesizliği, donatıların yetersizliği gibi nedenlerle kent ortamlarında yaşayan insanların sağlığı ve yaşam kalitesi olumsuz olarak etkilenmektedir. Bunun temel nedenlerinden bir tanesi kentleşmeye bağlı olarak gelişen hava ve yüzey sıcaklığının artmasıdı...

Giderek artan çevre sorunlarına yönelik olarak doğal dengenin korunması insanların yaşam kalitesinin korunması açısından önemli hale gelmiştir. Biyolojik çeşitliliğin korunmasına yönelik yeni bir takım çözüm önerileri gerekmektedir. Bu çözümlerden birisi de yeşil alt yapı sistemleridir. Yeşil alt yapı sisteminin amacı, doğal alanlar ile açık alanla...

Remote sensing technologies provide very important big data to various science areas such as risk identification, damage detection and prevention studies. However, the classification processes used to create thematic maps to interpret this data can be ineffective due to the wide range of properties that these images provide. At this point, there ar...

As one of the most important ecosystems, wetlands are threatened from both natural and anthropogenic activities. Mapping wetland is one of the curtail needs in order to prevent further loss. Since the beginning of the Remote Sensing revolution, different approaches using satellite images have been used for mapping and monitoring wetlands. In this...

It is very important to map the burned forest areas economically, quickly and with the high accuracy of issues such as damage assessment studies, fire risk analysis, and management of forest regeneration processes. Mapping burned areas with a fast and easy-to-use method and high accuracy will be a very useful tool for local forest management units....

Wetlands are transition zone where the flow of water, the cycling of carbon and nutrients, and the energy to form a unique ecosystem are characterized by its hydrology, soils, and vegetation, between dryland and water. Over the years, remote sensing techniques have proven to be a successful tool for monitoring wetlands. Both optical and microwave e...

Buildings are most affected the objects by earthquake disaster. Detection of collapsed buildings after an earthquake is important both for determining the current situation and quick response. Unmanned aerial vehicles that have evolved in recent years, can provide very high resolution images of the earth surface using camera systems attached to the...

The use of satellite technologies in remote sensing in recent years takes place in pre and post monitoring of earthquakes, especially in monitoring thermal anomalies before the earthquake. This paper discusses the thermal anomalies of the 2013 Balochistan Earthquakes that occurred in southwestern Pakistan on 24 September 2013 with a 7.7-moment magn...

As wetlands are one of the world’s most important ecosystems, their vulnerability necessitates the constant monitoring and mapping of their changes. Satellite-based remote sensing has become an essential data source for mapping and monitoring wetlands. As wetlands are dynamic ecosystems, their classification depends on many different parameters. Ho...

Wetlands benefits can be summarized but are not limited to their ability to store floodwaters and improve water quality, providing habitats for wildlife and supporting biodiversity, as well as aesthetic values. Over the past few decades, remote sensing and geographical information technologies has proven to be a useful and frequent applications in...

Urbanization is one of the most significant contributors to global warming as more than 50 % of the human population lives in cities. The growth of population and urbanization has also caused the phenomenon of Urban Heat Islands (UHI) which can be described as the alteration of temperatures in urban areas compared to their rural surroundings due to...

Urban heat island (UHI) is documented instance of anthropogenic climate change. UHI occurs when natural surfaces, are replaced by heat-trapping human activities. The urban area of Fethiye, Turkey, has been rapidly rising in the past few years. In this paper, the effects of UHI in Fethiye has been analyzed in the summer period of 2017, using Landsat...

Lately, IR thermography is frequently applied for important purposes in monitoring buildings such as energy leaking, ventilating and air-conditioning installations, electrical and mechanical installations, moisture detection etc. Nondestructive monitoring methods are essential in case of monitoring historical buildings. It is curtail not to destruc...

Wetlands provide a number of environmental and socio-economic benefits such as their ability to store floodwaters and improve water quality, providing habitats for wildlife and supporting biodiversity, as well as aesthetic values. Remote sensing technology has proven to be a useful and frequent application in monitoring and mapping wetlands. Combin...

Pan Sharpening is an important part of the Remote Sensing science. Obtaining high spatial resolution data can be crucial in some studies. Sentinel-2 provides data of 10, 20 and 60 meters, and it is a promising program for Earth observation studies. Although Sentinel-2 provides high range of multispectral bands, the lack of panchromatic band disable...

An urban heat island (UHI) is an urban area that is significantly warmer than its surrounding rural areas due to antropogenic activities. The urban area of the city of Skopje has been rising rapidly in the past decade. In this study, the effect of UHI is analyzed using Landsat 8 data in the summer period of 2013–2017 as a case study in Skopje, Mace...

Pan Sharpening is an important part of the Remote Sensing science. Obtaining high spatial resolution data can be crucial in some studies. Sentinel-2 provides data of 10, 20 and 60 m, and it is a promising program for Earth observation studies. Although Sentinel-2 provides a high range of multispectral bands, the lack of panchromatic band disables t...

The Black Sea Region is one of the most landslide prone area due to the high slope gradients, heavy rainfall and highly weathered hillslope material conditions in Turkey. The landslide occurrences in this region are mainly controlled by the hydro-climatic conditions and anthropogenic activities. Rapid regional landslide inventory mapping after a ma...

Geocoding is a tool that can be used in many areas such as the development of disaster prevention systems, crime mapping and the monitoring of communicable diseases, and which has gradually gained importance. However, the use of geocoding is not yet possible in some areas where it could serve as an effective tool, for various reasons such as incons...

Satellite images are commonly used for defining thermal urban environment and heat islands in urban areas. The objective of this study was to analyze and evaluate thermal environment of Uzundere-Erzurum using satellite images provided by the Landsat Thematic Mapper (TM) sensor on board Landsat 5 satellite. In respect to land use and urban surface f...

Wetlands are one of the most productive natural ecosystems in the world, thus wetlands mapping and monitoring it is of great importance. Over the years, both remote sensing data and techniques have proven to be a successful tool for monitoring wetlands. In this study, monthly observation over the Balikdami wetland area in the Central Anatolian Part...

There are some common problems of collapsed or heavily damaged buildings in past earthquakes, most of these problems are defined as irregularities and structural defects in many design codes. The presence of irregularities and structural defects affect the seismic performance of the building negatively. Some of these irregularities and structural d...

Mapping and monitoring of wetlands as one of the world`s most valuable natural resource has gained importance with the developed of the remote sensing techniques. This paper presents the capabilities of Sentinel-2 successfully launched in June 2015 for mapping and monitoring wetlands. For this purpose, three different approaches were used, pixel-ba...

Mapping and monitoring of wetland biomass as one of the world`s most valuable natural resource has gained great importance with the developed of the remote sensing techniques. Wetlands as a transitional between terrestrial and open-water aquatic ecosystems contain a mixture of open water bodies and vegetation. In the past few decades extensive loss...

On June 2016, two forest fires occurred at Kumluca and Adrasan in Antalya, Turkey. During these fires, a large forest area was exposed to fire in both locations. In this study, these areas were extracted from Landsat 8 satellite images, which were taken after the fire. Image processing consisted of three steps for burned area classification. In a f...

Mapping and monitoring of wetlands as one of the world`s most valuable natural resource has gained importance with the developed of the remote sensing techniques. This paper presents the capabilities of Sentinel-2 successfully launched in June 2015 for mapping and monitoring wetlands. For this purpose, three different approaches were used, pixel-ba...

Young Scientist Best Poster Presentation 2nd prize at 4th ICEES

Water monitoring is an important part of water resource management and has become an essential aspect of remote sensing. A number of indices have been developed for water extraction using satellite images. Even though all indices can extract the extent of a water body, none can do so without including a noise component, such as topographic shadows,...

The use of satellite technologies in remote sensing in recent years takes place in pre and post monitoring of earthquakes, especially in monitoring thermal anomalies before the earthquake. This paper discusses the thermal anomalies of the 2013 Balochistan Earthquakes that occurred in southwestern Pakistan on 24 September 2013 with a 7.7-moment magn...

Türkiye coğrafi konumu itibariyle Akdeniz iklim kuşağında yer almaktadır. Akdeniz iklim kuşağının; elverişsiz meteorolojik şartları, yanıcı Akdeniz bitki örtüsü, engebelik topografik yapısı ülkemizde orman yangını riskini arttırmaktadır. Özellikle orman yangınına 1. derece hassasiyette bulunan Marmara, Ege ve Akdeniz Bölgelerinde çoğunlukla yaz ayl...

With the developed of the remote sensing techniques mapping and monitoring of wetland biomass as one of the world`s most valuable natural resource has gained great importance. Wetlands as a transitional between terrestrial and open-water aquatic ecosystems contain a mixture of open water bodies and vegetation. Extensive loss of wetlands has occurre...

Drought is one of the costliest natural disasters in the world. Accurate mapping and monitoring of drought is notable for water management and drought mitigation efforts. Remote sensing instrument and techniques provide useful information for soil and water studies related to ecosystem sustainability, drought mitigation, water balance and water qua...

Snow cover is an important part of the Earth`s climate system so its continuous monitoring is necessary to map snow cover in high resolution. Satellite remote sensing is a science that successfully can monitor land cover and land cover changes. Although indexes such as Normalized Difference Snow Index (NDSI) has quite good accuracy, sometimes topog...

Unmanned aerial vehicles (UAV) have been used in a variety of fields in the last decade. In forestry, they have been used to estimate tree heights and crowns with different sensors. This approach, with a consumer-grade onboard system camera, is becoming popular because it is cheaper and faster than traditional photogrammetric methods and UAV-light...

This paper presents the results of a geomorphological investigation of Mount Akdag landslide complex, located on the Western Taurus range, SW Turkey. The landslide, resulting in the collapse of a 5 km segment of Mount Akdag, covers an area of 9.8 km 2 and has a volume of about 3 × 108 m 3. The 1:15,000 scale geomorphological map (Main Map) of the A...