Arif Oguz Altunel

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• MSc. in Forest Science at LSU
• Fellow at Kastamonu University

Digital Elevation Models (DEMs) are frequently used in geology, environment, engineering and architecture related studies. Along with the technological advances, there are also improvements in the production techniques of these data. The use of low cost UAVs and what they can achieve, are therefore important for researchers. This study was designed...

Aim of Study: Determination of the snow damage triggering stand and site parameter on trees. Area of Study: Damaged compartments of Yedicam and Burnuk Forest Directorates, #234 and #116, within Boyabat Forest Enterprise of Kastamonu Regional Directorate of Forestry. Material and Method: Two damaged and two control compartments from each directorate...

Key message Windstorms have recently caused noteworthy destruction across the Northern forests of Turkey. The intensive forest management practices applied for more than 60+ years may unknowingly have resulted in wind-sensitive forests in the region. After a storm, the forest service salvages the losses, but no further precaution is taken against f...

DEM generation since the turn of 21th century, predominantly relied upon space-borne imagery captured with active or passive sensors. However, Türkiye recently managed just that utilizing stereo captured air photography. Considerably high resolution national Digital Elevation Model, 5 m spatial, was the resampled version of the originally built 0.3...

Alterations in land-cover significantly influence global climate fluctuations. To utilize land resources rationally and sustainably, it is essential to identify the open-source remote sensing capabilities, the resulting products, and assess their geographical accuracies. This study conceptualized over Kastamonu province in northwestern Türkiye, foc...

Swiftly and reliably establishing a spatially and geometrically correct land-cover map of any region is rather important in natural resource planning for conservation and utilization. JAXA's PALSAR2/PALSAR/JERS-1 Mosaic and Forest / Non-forest maps, which as the name suggested, have specifically focused on global forest cover since 2007, benefiting...

Forest stand density diagrams help forest managers and practitioners more effectively manage stand density and tree occupancy to meet specific silvicultural goals. Therefore, creating such auxiliary silvicultural tools for different stands is essential. To our knowledge, no relative density graphs or diagrams have been developed for mixed stands in...

Revealing the status of forests is important for sustainable forest management. The basis of the concept lies in meeting the needs of future generations and today’s generations in the management of forests. The use of remote-sensing (RS) technologies and geographic information systems (GIS) techniques in revealing the current forest structure and i...

Türkiye has come a long way since the introduction of first nationwide topographic map coverage in 1959-60. Since then, many distinctly scaled topographic, geologic, administrative, etc. maps have been produced and put into service with the interested parties, domains and projects. Due to including considerable amount of surface and land-cover deta...

Validation studies of global Digital Elevation Models (DEMs) in the existing literature are limited by the diversity and spread of landscapes, terrain types considered and sparseness of ground-truth. Moreover, there are knowledge gaps on the accuracy variations in rugged and complex landscapes, and previous studies have often not relied on robust i...

Depending upon the technological advancements, many differently scaled topographical maps were manufactured and put into service in Türkiye. In this particular study, the elevation values of 1:25.000 scaled topographic maps produced with analogue means in 1992-1993 period were compared to later produced, digital means integrated 2009-2010 period ma...

Forest certification has gained global recognition along with sustainable forest management approach. Principles and criteria set aside by the certification bodies, have forced the administrative units to adopt new strategies to alleviate their production, protection and conservation initiatives. Although rules and regulations dictated by the certi...

There are many ways one can decide if an engineering related undertaking would be feasible and productive when the topography is thoroughly and precisely investigated before it takes shape. Forestry is just one profession that proper planning is of the essence when it comes to the logging phase of the entire production process. Logging in Türkiye i...

Forest resources serve the communities in various aspects, such as raw timber production, recreation, aesthetic, hydrological assurance, health of societies, wildlife management and sustainable management of biodiversity. One third of our country is covered with forest, and the majority of the mining endeavors also exist underneath these forests. I...

Extreme floods resulting from one of the heaviest ever documented rain storms over several urbanized coastal sub-districts in north-central Türkiye in August 2021, caused severe destruction, considerable property damage and tens of casualties. Peak discharges following the event were mostly greater than the projected 50-year and 100-year ones. This...

Primary transport, which is the initial stage of timber production, is heavily intertwined with technical and economical sensitivities by causing the most environmental concern during timber production. The depth of the environmental concerns, has direct effects over the sustainability of the resources, thus especially in and around the steep and t...

TanDEM-X Forest/Non-Forest (FNF) map(s) have been one such data focusing on the status of global forest coverage, which has played an essential role in combating climate change. Although the producers have carried out verification and comparison analyses , the need for accuracy assessments in a broader sense creates uncertainties for the users to a...

Keywords Abstract Global DEMs Quad maps DEM resolution TWI Flood Topographic Wetness Index, also known as the compound topographic index, (TWI) is a topographic indicator that calculates the potential of where water is likely to accumulate during excessive precipitation cycles resulting from abrupt atmospheric anomalies. High index values represent...

Cite this study: Altunel, A. O. & Celik, D. A., (2023). Sentinel-2 derivatives are rewriting land-cover history. Advanced Engineering Days, 6, 83-85 Keywords Abstract Sentinel-2 10 m multispectral Hi-resolution Land cover The terms, land-use, land-cover and change detection, gained their full meanings and came to researches' attentions after NASA's...

Elevation, vertical accuracy of any topographic Earth representation, e. g. stereo surface models, topo maps, DEMs, etc., is important if such data will be the base of further projects or development plans. The main form of these types of data in Türkiye is “1:25000” scaled quad maps. The third generation such maps were produced via digital stereo...

Louisiana has a well-developed oil & gas network and is rich in agricultural production, including a thriving forest industry. Situated at the mouth of the Mississippi River, it is a natural location for a biomass energy industry, yet biomass energy is clearly lacking. At the Louisiana State University Agricultural Center, researchers have been wor...

Floods and overflows, which pose serious problems for humanity in the world, frequently occur in Turkiye and can cause catastrophic results. It has been determined that the total number of floods that occurred in our country between the years 2010-2021 is 2486. One of the most important practices that should be done in order to prevent the flood ha...

There is little information on the improvement achieved across all versions of ASTER GDEM in terms of vertical accuracy. This study assessed the vertical accuracies of all three versions in Turkey and Nigeria based on the mean error, root mean square error, mean absolute error, average relative error, residual dispersal patterns and combined error...

The regional GIS geodatabases, which have started emerging since 2008 in Turkish forestry, have helped ease up Turkish forest service administrative and field duties tremendously. However, many of them, which are still in active service today, had geometric problems plaguing their effective use. This study shows how to detect and handle topological...

Defining watersheds with enough topographical features is crucial when large infrastructure projects are concerned. German Aerospace Center (DLR) recently announced the dissemination of the 90 m variant of the original global TanDEM-X 12 m Digital elevation model (DEM). It was announced as produced with a special averaging technique, which would ev...

The utilization of forest resources in Turkey has evolved since the beginning of industrialization. Ayancik district of the Sinop province can be called the cradle of this development. The establishment of a sawmill in 1929 to process the long overdue standing stock by a Belgium funded joint venture company, Zingal-Turkish Joint Stock Incorporated,...

Technical forest management started 180 years ago in Turkey, during which time there have been various approaches and policy changes. The primary objective of forestry has been considered as timber production, so the intangible benefits have never been given the proper attention they deserve. The majority of Turkey's wildlife has prospered within t...

Roads have long been an integral asset for civilization. A lot of things have been said, drawn and shown regarding what and what not to do while drafting the routes. No matter how conscientious they are planned and laid out, mishaps occur while placing them on terrain. The demand to tie two points with the shortest possible route, create cut slopes...

Remote sensing Digital Elevation Models Accuracy Assessment RMSE Digital Elevation Models have been known as the representations of terrain elevation data captured, processed and released by remote sensing capabilities. They could either be called Digital Surface Models, which include elevation data of the Earth along with the objects later placed...

Interaction between humans and forests has always been strong. Wood has been at the core of all humankind’s endeavors since the discovery of fire and learning how to fabricate it out of trees. The exploitation of forests has not been limited to the procurement of wood, but the concepts of sheltering, hunting, and protection have also been matured n...

Forests play essential roles for the protection of the earth when we are struggling with global climate change. It is necessary to examine the current status of the forests and their changes over time in order to determine the precautions to be taken in the future to overcome the environmental issues associated with the climate change. For this rea...

Forests and afforestation have significant importance, given the present course of World’s climate resulting from our insensitive behaviors, policies, ambitions, etc. Turkish Forest Service has departments, sole purposes of which are to combat desertification through afforestation,flood control, and watershed rehabilitation works. Majority of the w...

Presentation of how forest ecosystems are fragmented even in the conservation areas

Forest management and nature conservancy are both governed over the same piece of land in Turkey. Forestry deals with the sustainable management of both tangible i. e. timber, none-timber, hunting licensing, etc., and intangible, i. e. water, air, soil conservation aspects while nature conservancy takes care of the floristic, faunistic, aesthetic,...

German Aerospace Center (DLR), EADS Astrium GmbH and Infoterra GmbH alliance came up with the idea of taking DTED-2 (Digital terrain elevation data, level-2) specifications to even higher standard of HRTE-3 (High resolution terrain elevation, level-3) in 2006, as a result TDX (TerraSAR-X, TanDEM-X) constellation was born. The mission was geared to...

Forests in Turkey are generally situated on mountainous and treacherous terrains, making the initial phase of forest operations, a.k.a. primer transport, difficult. Primer transport includes manual felling of the marked trees from the stand, processing them on site, i.e. delimbing, debarking and bucking into merchantable sizes, and skidding the pie...

Generally, there are two stages in the transportation of raw wood material from the forest. The first one is the primer transport that is the process of moving trees or logs from the cutting site to a landing or road side where they will be processed into logs or consolidated into larger loads for transport to a processing facility or other final d...

Watershed planning is a major issue in Turkey and other parts of the world. Surrounded by seawater on almost three-quarters of its international borders and by sheer mountains along the coastal regions and throughout the country, Turkey experiences a range of climatic changes, which constantly shape its topography. Recently, the occurrences of floo...

National park is defined as a piece of land coming forward with domestic and international uniqueness; scientific, aesthetic and cultural sources values; recreation and tourism possibilities. The definition first came to public recognition when the World’s first national park, “Yellowstone” was declared by the United States in 1872. After defining...

In order to extensively and efficiently manage the forest areas, a well thought and constructed forest road network, “secondary transportation plan”, on which the timber will be hauled to log yards or processing mills must first be devised. “Primary transportation plan”, which is the initial phase of timber extraction (logging) in any forest operat...

For a successful fire suppression, it is essential to detect and intervene forest fires as early as possible. Fire lookout towers are crucial assets in detecting forest fires, in addition to other technological advancements. In this study, we performed a visibility analysis on a network of fire lookout towers currently operating in a relatively fir...

The progress and extend of Geographic Information Systems (GIS) and its application capabilities have broadened so much that the solutions which can be attained through this technology is especially invaluable in natural sciences and almost endless. One of the very practical applications involves extracting drainage networks from Digital Elevation...

Timber extraction (logging), an initial stage of forest operations, involves felling of timber and removing them off the stands. This stage of forestry, if not planned and supervised properly, is the reason for various adversities one never expects happening in forested areas, such as erosion, sedimentation, soil compaction and displacement, etc. L...

There are roughly 7 to 8 million people, called forest villagers, living in or around state forests in Turkey today. Their means of making a living for themselves and their immediate families are totally depended upon the possibilities and opportunities generated by the forest service and its subordinate enterprises, directorates, etc. The forest s...

The initial phase of forest operations, timber extraction (logging), involves felling of timber and removing them out of the stands. This phase of forestry, if not planned and supervised properly, is the reason for various adversities one never expects happening in forested areas, such as erosion, sedimentation, soil compaction and displacement, et...

Forest ecosystems which contain half of the terrestrial carbon deposits; play a significant role in shaping the global climate. Two different methods are used to determine the above-ground carbon stock capacity of forestlands. Direct measurement method takes a long time and requires both extensive as well as expensive field and laboratory work. One...

Hassas ormancılık, 21. asrın başlarından itibaren Avrupa ve Kuzey Amerika ormancılığında dile getirilmeye başlanmış, çoğumuzun bugün dahi ilk defa duymakta olduğu yeni bir terimdir. Hassas ormancılık yaklaşımı, hali hazırda küresel ölçekte fikir birliğine varılmış olan bir tanıma sahip olmamasına rağmen; çıplak topraktan başlayarak, son kullanıcını...

ArcGIS ve benzeri coğrafi bilgi sistemi (CBS) yazılımları, mekânsal veri toplama, organize etme ve karar vermede, haritaların yapımında, uzunca süredir sıklıkla kullanılmaktadırlar. Bununla beraber, az gelişmiş ve ülkemizin de içinde bulunduğu gelişmekte olan ülkelerde yer alan, özellikle serbest orman mühendisleri, yukarıda bahsedilen pahalı CBS y...

Özet Ormancılıkta üretim faaliyetleri silvikültürel amaçları gerçekleştirmek için amenajman planları doğrultusunda damga ile başlar. İnsanoğlunun sonsuz isteklerine cevap vermeye yönelik kıt kaynak kullanımını ifade eden üretim; ekonomik, çevresel ve sürdürülebilir olmalıdır. Her ne kadar amenajman planlarındaki etalar damga faaliyetinin esasını ol...

Digital elevation data, commonly known as DTM, DEM, DTD, etc., consist of a group of elevation measurements recorded for regularly spaced positions distributed over any given land surface. These are the most widely used means to analyze the earth surface. They are the topographic representation of the earth surface excluding the objects which are o...

Terrestrial methods are being used to obtain most of the base layering for the forestry studies in Turkey, nowadays. Topographic methods are being developed accordingly with developing technological opportunities, and computer based digital systems are being preferred instead of mechanical measurement instruments that were used in the past. Global...

Forestry and its derivatives are the major players in revenue generation all around the Black sea region in Turkey. Roughly one fourth of the country’s land area is covered with forests, which yield a decent 42.2 million m3 annual increment with a 17 million m3 allowable cut. Black sea region is the leading forest area boasting a remarkable 17.7 mi...

Baraj havzalarındaki yanlış arazi kullanımı ve doğal dengeyi bozucu faaliyetler, baraja normalden fazla sediment gelmesine neden olmaktadır. Gelen fazla sediment ile ölü hacim hızla dolmakta, aktif hacim de küçülmeye başlamaktadır. Aktif hacmi ekonomik ömründen önce dolmaya başlayan barajlar görece kısa bir sürede yapım amacı açısından kullanım dış...

Istanbul with its roughly 13 million inhabitants, is the largest province in Turkey. However, this so called largeness if considered when one takes the land area of the city (~5500 km 2) into consideration, ranks it rather low among the rest of the country's other provinces. People from all around the country have come to Istanbul to catch new oppo...

Streamside Management Zones (SMZs) are designated areas consisting of the stream and an adjacent area of varying width where management practices that might affect water quality are modified. Streamside Management Zones filter sediment and nutrients from overland runoff, allow water to soak into the ground, protect stream banks and lakeshores, prov...

Roads are crucial to sustainable forest management. Forest roads are needed for implementing any kind of forest management practices, for acting as fire barriers during forest fires, to give way to higher pastures for grazing to provide access for recreational activities and also, in Turkey and many parts of the world to provide a link between fore...

Within the time frame we are living today, one of the toughest problems that need urgent addressing, is to understand the changes and interactions occurring due in part to human needs, of land cover and land use both in our country and around the World. Classification of lands that will enable them to function properly, will maximize the usefulness...

GIS INTEGRATED FOREST ROAD PLANNING, Geographic Information Systems (GIS) have turned out to be an increasingly significant tool for environmental planning and environmental impact studies in recent years. Different “Multi Criteria Decision Making” (MCDM) approaches are developed to combine factors in land suitability analyses for potential land us...

The possibilities of minimum expence forest road construction and maintenance, and transportation works, as well as environmentlly sound planning of these roads must be investigated in order to keep up with the forestry applications, because the size of pertaining industry is so complex that the immensity and expences of preparation works are risen...

The aim of the project is to design on computer, The Forest Vegetation Map of Citdere District within the Zonguldak Forest Directorate. Aerial photography and conventional methods were used in data acquisition. The site properties are essential for tending, natural / artificial regeneration and plantation. Any work, not taken into considerations of...

Adjusting truck tire inflation to changing road and load conditions has been demonstrated to im- prove road conditions and is thought to decrease truck maintenance costs. Good roads will minimize the future cost of utilizing forest resources. In this study, the various effects of both low- pressure and high-pressure truck tires on the trans- portat...

All in the attached pdf.