Yazarlar
- Aydin, Metin Mutlu(13)
- Araz, Onur(11)
- Coruh, Emine(7)
- Peker, Iskender(6)
- Üzülmez, Mehmet(6)
- Mızrak, Sefa(5)
- Ozturk, Kasif Furkan(5)
- Seferoğlu, Mehmet Tevfik(5)
- Çoruh, Emine(5)
- Akpinar, Muhammet Vefa(4)
- Alemdağ, Selçuk(4)
- Bayraktar, Alemdar(4)
- Bilgic, Abdulbaki(4)
- Cakir, Tufan(4)
- Comert, Resul(4)
- Dağ, Serhat(4)
- Çavdar, Özlem(4)
- Akinoglu, Bulent G.(3)
- Alemdag, Selcuk(3)
- Altunişik, Ahmet Can(3)
- Ar, Ilker Murat(3)
- Bilgilioglu, Burhan Baha(3)
- Eraslan, Selim(3)
- Erol, Ismail(3)
- Günen, Mehmet Akif(3)
- Nizetic, S(3)
- Ozden, Talat(3)
- Papadopoulos, A(3)
- Sevin, Sedat(3)
- Urak, Faruk(3)
- Yalvac, Sefa(3)
- Çavdar, Ozlem(3)
- Çelik, Muhammet(3)
- Çömert, Resul(3)
- Özdemir, Samed(3)
- Acar, Ramazan(2)
- Akbulut, Zeynep(2)
- Akgol, Kadir(2)
- Aksüt, Yavuz Selim(2)
- Altundaş, Suna(2)
Yayınlar
- MakaleAçık Erişim2023Geographic information system approach in evaluating the geotechnical properties of soils: A case study of Oymaağaç in Kayseri; [Zeminlerin geoteknik özelliklerinin değerlendirilmesinde coğrafi bilgi sistemi yaklaşımı: Kayseri Oymaağaç örneği]
Acar, Mehmet Cemal; Kaya, Dilek
Kayseri, the ninth biggest city in Turkey, the regions opened to the ongoing construction of residential areas are expanding rapidly parallel to population growth. Soil improvement works are carried out in areas with the poor bearing capacity of foundations and in regions that are not suitable for safe construction. This event causes severe economic losses in urban development. This study proposes a (Geographic Information System) GIS-based approach to comprehensively understand the research area's underground conditions, predetermine the zones opened for construction by considering the parameters affecting the foundation of the buildings, and create an informative geotechnical model with visualization technology. For an exemplary application, a database was created with ArcGIS in the Kayseri Oymaağaç location, and geological and geotechnical data were combined. The soil properties of this one million five hundred thousand square meter area opened for new settlement were analyzed in a GIS environment. The variation of SPT-N values measured in 60 boreholes in the field with depth, soil types, groundwater levels, and Vs data were used to combine the data, and related maps were drawn. Then, maps of the liquefaction of the soil in a possible earthquake and visual maps showing the bearing capacity of the foundations were created. This study will offer the best and most reliable land-use scenarios and in situ soil properties to decision-makers such as engineers, government agencies and disaster management. It will contribute to making accurate and fast decisions in urban planning. In addition, it will also be able to use as a tool for risk management in emergencies.
- MakaleAçık Erişim20233D data integration for geo-located cave mapping based on unmanned aerial vehicle and terrestrial laser scanner data
Çömert, Resul; Özdemir, Samed; Bilgilioglu, Burhan Baha; Alemdag, Selçuk; Zeybek, Halil Ibrahim
The Akçakale cave is a significant natural and cultural heritage site in the Black Sea region of eastern Turkey. The complex geometry and difficult-to-access areas of the cave have made the use of traditional mapping methods challenging. To overcome these limitations, this study utilized TLS and UAV technology to produce highly accurate 2D and 3D data for cave management and risk assessment purposes. The TLS system was used to create a detailed 3D point cloud of the cave interior, while the UAV system generated a 3D model of the surface topography outside the cave. The two sets of data were combined in the GIS environment using a geodetic network established in the study area, providing a common geodetic reference system for both TLS and UAV data. The study found that the cave area is 13,750 m2, which is smaller than the area of 18,000 m2 that was previously estimated using conventional measurement methods. The volume and ceiling heights of the cave were calculated using the elevation models generated from TLS point cloud data. The 3D point cloud data were also used to map dripstone locations on the floor and ceiling of the cave, and the boundaries of rock blocks on the ground were precisely determined. The study identified potential risks associated with the cave, particularly the risk of rockfall in the source rock areas around the cave entrance and the southern part of the cave. The nearest building to the cave is approximately 35 meters away, and all the buildings in the area are less than 300 meters from the cave. In the event of the cave collapse, the buildings in the southern part of the cave are at risk of rockfall. This study demonstrates the effectiveness of combining data from TLS and UAV systems to generate broad and sensitive cave mapping and risk assessment data, which are critical for cave management and safety. The collected data can be used for cave stability investigations and rockfall risk assessments. This study provides a foundation for future explorations of the Akcakale cave and highlights the potential for modern surveying techniques to enhance our understanding of complex geological structures such as caves.
- MakaleYalnız künye2023SPAN: An open-source plugin for photovoltaic potential estimation of individual roof segments using point cloud data
Özdemir, Samed; Yavuzdoğan, Ahmet; Bilgilioğlu, Burhan Baha; Akbulut, Zeynep
Decentralized solar PhotoVoltaic (PV) is one of the most promising energy sources for cities and individuals pursuing energy self-sufficiency. Especially, the already available rooftop surfaces are a major contributor to push for rooftop mounted PV systems. However, accurate PV potential estimation of individual buildings is still a challenging task since many parameters must be considered such as meteorological factors, panel technology, geographical location, available roof surface area, surface azimuth and tilt angle. In this study, we created an efficient approach that can be used for roof surface's PV potential estimation based on point cloud data and capable of processing various scales from single building to city scale. In the proposed approach, each roof surface's features were utilized for PV potential estimation by employing the PVGIS database. PV potential estimation was carried out on daily, monthly, and annual periods to provide a better estimation. Also, we developed a flexible and easy to use open-source plugin based on the QGIS software for rooftop mounted PV potential estimation capable of estimating every roof surface's PV potential. The method was tested on 80 buildings selected from ROOFN3D dataset. The proposed approach achieved an overall accuracy of 84% and an F1 score of 0.92.
- MakaleAçık Erişim2023Effect of individual characteristics, risk perception, self-efficacy and social support on willingness to relocate due to floods and landslides
Mızrak, Sefa; Turan, Melikşah
People may have to leave their home, environment, region and country because of disasters or disaster risks. Effective and efficient disaster risk reduction activities involving the community can reduce disaster risks and enable people to reside more safely and peacefully in their environment. The objective of this study was to investigate whether individual characteristics, risk perception, self-efficacy and perceived social support were correlated with the willingness to relocate due to floods and landslides. The data were collected from 947 people residing in Gümüşhane Province (Türkiye) using a survey. In the study, a total of ten models were tested with the help of ordinal logistic regression analysis. Consequently, the participants' willingness to relocate due to landslides was determined to be higher than the willingness to relocate due to floods. University students and people with chronic diseases and flood and landslide experiences had a greater willingness to relocate. Residence duration and informal social support were negatively correlated with relocation willingness. Those who believed that they could protect themselves in the event of a flood and landslide were more likely to relocate. Among risk perceptions, probability increased relocation willingness mostly due to floods, while fear increased relocation willingness mostly due to landslides. This study attempted to provide policy makers and scientists insight into disaster risk reduction and disaster risk communication related to relocation.
- MakaleYalnız künye2023Optimum tuned tandem mass dampers for suppressing seismic-induced vibrations considering soil-structure interaction
Araz, Onur; Noroozinejad Farsangi, Ehsan
In recent studies, it has been stated that tuned tandem mass dampers (TTMD) will be a practical mechanical solution to reduce the dynamic responses of structures under seismic excitations. However, since TTMD is tuned based on the dominant frequency of the superstructure, ignoring the soil-structure interaction (SSI), it may cause a notable deterioration in the control performance of the control devices. Thus, a methodology for the optimum design of TTMD positioned on the top story of a high-rise building due to near-fault pulse-like ground motions considering potential SSI effects has been investigated in this paper. Firstly, the TTMD is located on the top story of a well-known 40-story shear building, and the equations of motion for soil-structure-TTMD interaction are derived. Based on the sequential quadratic programming (SQP), the tuning parameters of TTMD are then found for different support conditions in the frequency domain. The efficiency of SQP is also compared with two meta-heuristic algorithms (i.e., simulated annealing and pattern search algorithms). The effectiveness of optimum TTMD is tested using 30 near-fault pulse-like ground motions using time-domain analyses. Numerical results showed that the optimum TTMD is more effective in suppressing the maximum displacement and inter-story drift of the building, considering SSI. It is also found that the frequency content of the earthquake, as well as the pulse period of the earthquake and soil type, has a significant effect on the control performance of the TTMD.
- MakaleYalnız künye2023Examining the role of urban-industrial symbiosis in the circular economy: an approach based on N-Force field theory of change and N-ISM-Micmac
Erol, Ismail; Peker, Iskender; Ar, Ilker Murat; Searcy, Cory
The circular economy (CE) refers to a new industrial paradigm that contrasts with the linear supply chain structure based on a "take, make, use, dispose" pathway. Due to its potential contributions to improving the CE, industrial symbiosis (IS) has been recognized as a feasible way to advance it. Urban symbiosis is an extension of IS that involves a series of symbiotic relationships among enterprises within the urban area. Combining urban and industrial symbiosis (Ur-IS) is a step toward better resource efficiency in urban areas and industrial zones and urban areas. However, while there are several driving forces for Ur-IS adoption, there are also many inhibiting factors. A comprehensive decision framework is needed to address the principal drivers and challenges for Ur-IS initiatives. Türkiye, designated as a candidate for full EU membership in 1999, also places importance on environmental sustainability goals and effective resource management in its own move towards a CE. Our literature review concluded that there is only one quantitative study investigating the driving and (or) restraining forces for Ur-IS adoption in emerging and industrialized countries. The main purpose of this study is to investigate the potential of Ur-IS implementation in Türkiye through the proposed Neutrosphopic-Simple Additive Weighting Method-based force field theory of change and the Neutrosphopic–Interpretive Structured Modeling-Cross-Impact Matrix Multiplication Method. The findings suggest that lack of policies, lack of incentives and regulations, and vulnerability and supply uncertainty are the most significant restraining forces for Ur-IS implementation in Türkiye. The research findings can assist decision-makers in Türkiye in effectively implementing Ur-IS.
- MakaleAçık Erişim2023Investigation of the structural damage caused by blasting activities in tunnels to surrounding buildings: The case of Gümüşhane belt highway; [Tünellerde patlatma faaliyetlerinin çevre binalara verdiği yapısal hasarın incelenmesi: Gümüşhane çevre yolu örneği]
Seferoğlu, Mehmet Tevfik; Seferoğlu, Ayşegül Güneş; Akaryali, Enver
Tunnels are road transport structures that reduce traffic and expropriation problems, noise, and possible damage to animals and plants, and provide safer, more comfortable, and faster transportation for vehicles compared to highways. However, some environmental problems occur during tunnel construction. These problems such as vibration, noise, rock throwing, etc. caused by the blasting process used during tunnel excavation on buildings and people should be well investigated. In this study, two buildings located close to the exit and entrance of two tunnels (T2 and T3 tunnels) on the Gümüşhane belt road were chosen to investigate. Firstly, the existing damages in the first building, which is 7 m away from the T2 tunnel exit, and the second building, which is 60 m away from the T3 tunnel entrance, were analyzed by considering criteria such as the geological and ground condition of the land and the building materials used during the construction of those building. In addition, the negative effects on the buildings were evaluated by calculating the vibrations after the blasting process in the tunnel with the help of various empirical formulas. Investigation on site showed that building 1 was built of masonry and building 2 was built of reinforced concrete, and that deep cracks had formed in the bearing systems of both buildings, spills occurred in the walls, and fractures in the windows. Also, calculations with empirical formulas showed that the vibration rates caused by blasting process in the 1st and 2nd buildings were as 385.68 mm/sec and 6.91 mm/sec, respectively, and these vibration values were above the standard values. The data obtained through examination on-site and empirical approaches show that it would be dangerous for people to be resident in both buildings.
- MakaleYalnız künye2023Excessive groundwater withdrawal and resultant land subsidence in the Küçük Menderes River Basin, Turkey as estimated from InSAR-SBAS and GNSS measurements
Yalvaç, Sefa; Alemdağ, Selçuk; Zeybek, Halil İbrahim; Yalvaç, Murat
Küçük Menderes River Basin (KMRB) is located in the western part of Turkey in the city of İzmir. The basin hosts about half a million people and 90% of the population makes their living from farming and animal husbandry. Most of the water needs for agricultural irrigation, animal husbandry, and drinking are met from groundwater resources in the basin. Since the water pumped from the aquifers cannot be naturally recharged by surface waters and precipitation, the groundwater level is rapidly receding and a decrease of up to 150 meters has been observed in the historical groundwater level time series since the 1990s. For this reason, land subsidence occurred in the basin and as a result of this, crustal surface cracks have formed and infrastructure and superstructure facilities have been endangered. To prevent loss of life and property that may occur in the future, it has become necessary to estimate the magnitude and the expansion zone of the land subsidence by carrying out geodetic monitoring studies in the region. In this study, the analyzes performed by Interferometric Synthetic Aperture Radar-Small Baseline Subset (InSAR-SBAS) and Global Navigation Satellite System (GNSS) methods to monitor land subsidence in the KMRB are presented. For this purpose, monthly 74 SAR images from 2017 to the end of 2022 were evaluated according to the SBAS procedure in the GMTSAR academic analysis software. In order to, both validate the InSAR-SBAS results and convert the deformation rate in the Line of Sight (LOS) to the ellipsoid normal direction, 3 periods of GNSS campaign were performed between 2021 and 2023 in 5 different GNSS stations and evaluated with the GAMIT/GLOBK software. According to the analyses, the land subsidence rate of up to −165 mm/year has been estimated in the KMRB, especially in the district centers of Bayındır and Ödemiş. In addition, unlike many studies, different rates and propagation of subsidence were determined in different parts of the basin depending on the aquifer type and precipitation. Monthly time series of the deformations were created and the behavior of the deformations and its relationship with the groundwater withdrawal and the lithological structure in the region was scrutinized. Thus, the spatio-temporal behaviour of the land subsidence and the associated geological factors were revealed.
- MakaleAçık Erişim2022Yeni Bir Şehir Kıyaslama Metodolojisi: Çok Boyutlu Yönetimsel İçgörü
Şimşek, Ahmet Bahadır; Gurkan, M. Edib
Kıyaslama, karar vericilerin kuruluşları hakkında güçlü ve zayıf yönleri, öncelikleri, geçmişi ve geleceği gibi farklı perspektiflerden kritik çıkarımlar yapmalarını sağlayan bir yönetim aracıdır. Şehirlerin kıyaslaması, yöneticilere politikaların değerlendirilmesi ve stratejik kararlar alınması açısından sağladığı faydalar nedeniyle bilim insanlarının ilgisini çekmektedir. Şehir kıyaslaması üzerine mevcut araştırmalar, kıyaslama faktörlerini belirlemeye ve kıyaslama skorlarını ölçmek için yöntemler geliştirmeye odaklanmıştır. Bir diğer ifadeyle, mevcut yöntemler, şehirleri karşılaştırmak için ağırlıklı faktörleri birleştirerek tek bir puan hesaplamayı amaçlamaktadır. Bununla birlikte, politika yapıcılar, politikalarına rehberlik etmek için basit bir puanlamaya sahip olmak yerine daha ayrıntılı bilgi talep etme eğilimindedir. Bu çalışmada önerilen kıyaslama yaklaşımı bu boşluğu doldurmayı amaçlamaktadır. Önerilen yaklaşım, kıyaslama için kabul edilen çok kriterli karar verme tekniğinin duyarlılık analizine dayanmaktadır ve karar vericiler her şehir için üç ana çıktı sunmaktadır: (i) karar verici yanlılığından uzak, uzlaşıya dayalı bir sıralama sunar, (ii) daha iyi sıralama elde etmek için minimum çaba gerektiren öncelikli alanları gösterir ve (iii) geçmişten bugüne uygulanan politikaların sonuçlarının göreceli etkilerini sergiler ve geçmişten bugüne uygulanan politikalar devam ettirilirse şehrin gelecekteki sıralamasını yansıtır. Metodolojinin uygulanışı bir vaka çalışması ile gösterilmektedir. Vaka çalışması, önerilen metodolojiyi uygulamanın karar vericiye önemli yönetimsel çıkarımlar sunması sebebiyle oldukça ümit verici olduğunu vurgulamaktadır.
- MakaleYalnız künye2022Investigation of usability of building rubble as road underfill
Külekçi, Gökhan; Osman Yilmaz, Ali
For resources to be used efficiently, the structures built on the earth must be long-lasting. The longevity of the roads built with a length of millions of kilometers per year is determined by the nature of the filling material, traffic, equivalent axle load, climatic effects, material fatigue, and layer thicknesses used. The fact that filling material complies with the standards and is easily available will ensure that the road construction works are both economical and long-lasting. Many building rubbles are formed from the buildings that have completed their lives in the urban transformation process. Storage and disposal of this building's rubble are very difficult. To eliminate these difficulties, the usage areas of the rubble should be increased. In this study, some mechanical experiments were carried out on the building rubble obtained from the Black Sea region, and these were interpreted. Grain density, freeze-thaw tests, Micro-Deval, and Determination of Fragmentation Resistance, tests were carried out according to TSE and ASTM standards of aggregates obtained from building rubble. The results obtained from the experiments were compared with the technical specifications of the General Directorate of Highways. It has been revealed that the analyzed aggregate can be used as road fill in highways.
- Derleme MakaleAçık Erişim2022Depremlerden Sonraki Yeniden Yapılanma Süreci Üzerine Küresel Bir Araştırma: Çelik Prefabrik Malzeme Kullanımının Gerekliliği
Öztürk, Serkan; Etki Of, Nesibe
Bu çalışma kapsamında, çelik prefabrik yapıların yapısal özellikleri, Türkiye ve dünyada kullanım oranları ve niçin kullanılması gerektiği konuları bilimsel kaynaklar ortaya konularak araştırılmıştır. Farklı çalışmalardan elde edilen sonuçlar derlenerek, afet yönetimi için oldukça önemli olan yeniden yapılanma sürecine dikkat çekilmiştir. Çelik yapılar, hafif ve esnek malzemeler oldukları için depreme karşı mukavemet gösterirler. Bu ve daha birçok özelliğinden dolayı yüz ölçümünün büyük bir bölümü deprem bölgesinde yer alan ülkemizde konutların çelik prefabrikasyon ile yapılması gerekmektedir, çünkü bu yapıların depremlerde yıkılmadığı veya hasar alarak ayakta kaldığı literatürdeki birçok araştırma sonucunda kanıtlanmış olup afet yönetiminde ileri seviyede bulunan ülkeler tarafından da kanıksanmıştır. Türkiye ise çelik üretiminde dünyada yedinci sırada bulunmakla birlikte, bu durum yapı sektörüne yansımamaktadır. Depremler yaşandıktan sonra yeniden yapılanma sürecine gelindiğinde, yıkılan veya ağır hasar alan binaların yerine çelik konstrüksiyon binaları inşa etmek gerekmektedir. Bu strateji, kriz yönetiminin son basamağı olan yeniden yapılandırmada sağlam temeller atmayı sağlayacak ve risk yönetiminin ilk basamağı olan zarar azaltma evresindeki çalışmaları destekleyici nitelikte olacaktır. Bu bağlamda, önemli bir kazanım olarak, tam anlamda bir bütünleşik afet yönetimi döngüsü oluşturulabilecektir.
- MakaleAçık Erişim2022Belediye Hizmetlerinden Memnuniyetin Ölçülmesine Yönelik Bir Araştırma: Gümüşhane Belediyesi Örneği
Çakır, Canan
Yerel yönetimler, halka en yakın yönetim birimleridir. Yerel yönetimler halkın yerel nitelikteki ortak ihtiyaçlarını karşılamak amacıyla birtakım hizmetler sunmaktadır. Günümüzde yerelleşme politikalarının ön plana çıkması ile birlikte kamu hizmetleri sunumunda belediyelerin önemi daha da artmıştır. Bu çalışmanın amacı, Gümüşhane Belediyesi’nin sunduğu hizmetlerden, Gümüşhane’de yaşayan vatandaşların memnuniyet ve sadakat düzeylerini ölçmektir. Çalışmada veri toplama aracı olarak, nicel veri toplama yöntemlerinden anket formu uygulaması kullanılmıştır. Bu kapsamda web tabanlı anket ve kolayda örnekleme yöntemi ile Gümüşhane merkez ilçede 329 adet veri toplanmıştır. Araştırmada elde edilen verilerin analizinde yapısal eşitlik modeli türlerinden biri olan varyans tabanlı kısmi en küçük kareler yöntemi (PLS-SEM) kullanılmıştır. Araştırma sonucunda, afet hizmetleri, sosyal hizmetler, ticaret ve ekonomik hizmetler, ulaşım hizmetleri ve belediye çalışanlarının değerlendirilmesi ile ilgili memnuniyet arasında olumlu ve anlamlı ilişki bulunmamaktadır. Bununla birlikte, imar ve şehir hizmetleri, kültür ve turizm hizmetleri, çevre, temizlik sağlık hizmetleri, belediye değerlendirme, genel değerlendirme ile ilgili memnuniyet arasında olumlu ve anlamlı ilişki bulunmuştur. Çalışmanın sonucunda, bu çalışmanın literatüre ve uygulamaya katkısından bahsedilmiştir.
- MakaleAçık Erişim2022İzmit Körfezi ve Çevresinde Bina Yoğunluk ve Sıvılaşma Yayılımının Mekânsal Analizi
Şentürk, Erman; Üstün, Aydın; Comut, Fatma Canaslan; Kaya, Efdal; Aşcı, Metin; Nehbit, Pakize Küreç; Konak, Haluk; Irmak, Tahir Serkan; Yalvac, Sefa; Erener, Arzu
2017 yılı Aralık ayından itibaren KOÜ Harita Mühendisliği Bölümü’nün yürütücülüğü ve Kocaeli Büyükşehir Belediyesi’nin desteği ile “Çok Bandlı InSAR ve GNSS Tekniği ile Doğu Marmara (İzmit Körfezi) Düşey Yönlü Yer Değiştirmelerin İzlenmesi, Zemin Çökmeleri ile Bina Yoğunluğu ve Sıvılaşma İlişkisinin Araştırılması” başlıklı ve 117Y155 numaralı TÜBİTAK projesi kapsamında İzmit körfez bölgesinde risklerin tespiti için çalışmalara başlanmıştır. Bu bağlamda, proje kapsamında yapılan bina yoğunluk analizleri ve sıvılaşmanın körfez bölgesi çevresindeki mekânsal dağılımı CBS ortamında bütünleşik olarak ele alınarak mekânsal dağılımları incelenmiştir. Zemindeki yüke ait bilgi çıkarımı için binaların 3. boyutu dikkate alınarak bina katlarının mekânsal dağılımları mekânsal otokorelasyon çalışmaları ile irdelenmiştir. Mekansal otokorelasyon analizlerinden Lokal Moran’s I istatistikleri dikkate alınmıştır. Ayrıca körfez ve çevresinde görülen sıvılaşma potansiyeli 0-3 m, 3-6 m, 6-9 m, 9-12m’den 33-35 m derinlikleri için oluşturulmuştur. Sıvılaşma potansiyel eşiklerine göre, farklı derinlikler için, sıvılaşma değerleri kategorize edilerek sıvılaşma alanları ve riskli bölgeler tanımlanmıştır. Sonuç olarak sıvılaşma risk alanlarında bulunan bina tespitleri yapılmıştır. Çalışma; ileriye yönelik doğal afetlere karşı sürdürülebilir önlemlerin alınması, yapılaşma hızı ve yoğunluğu için önlem planlarının hazırlanması, Gölcük ve İzmit Körfez çevresinde bina ve zemin sıvılaşmalarının mevcut durumunun belirlenmesi, risk taşıyan alanlarda mühendislik tedbirlerinin alınarak yapı ve can güvenliğinin sağlanması ve afet değerlendirmelerinde altlık oluşturması açısından önem arz etmektedir.
- MakaleAçık Erişim2022Doğu Karadeniz Bölgesi Sahil Otoyol Çevresindeki Karayosunlarında Trafik Kaynaklı Ağır Metal Analizleri
Kaya, Selim; Koz, Bahadir
Bu çalışmanın amacı; Giresun-Samsun otoyol çevresindeki karayosunları kullanılarak Trafik kaynaklı ağır metal kirliliğini belirleyebilmektir. Karayosunları, ağır metalleri biriktirebilme yeteneğinden dolayı, ağır metal hava kirliliğinin belirlenmesinde oldukça uygun biyoindikatörlerdir. Türkiye’nin Doğu Karadeniz bölgesinde yer alan Giresun-Samsun otoyolu çevresindeki karayosunlarının ağır metal analizleri InductivelyCoupledPlasma–MassSpectrometer (ICP-MS) cihazı kullanılarak belirlendi. Karayosunlarının kalitatif analizleri neticesinde Cr, Fe, Mn, V, Zn, Cu, Ni, Pb ve Co olduğu belirlendi. Şehir merkezlerinden toplanan karayosunlarındaki konsantrasyon değerleri sırasıyla 15.12, 6087.31, 301.12, 27.80, 74.20, 38.48, 56.69, 19.40 ve 9.10, mg/kg olarak belirlenirken, şehirler arasından toplanan karayosunlarının ağır metal konsantrasyonları ise 15.56, 4751.23, 247.93, 28.03, 83.71, 33.72, 48.38, 17.20 ve 6,97 kg/kg olarak belirlendi. Genelde karayosunlarında, Krom(Cr), Demir(Fe), Mangan(Mn), Vanadyum(V), Çinko(Zn), Bakır(Cu), Nikel(Ni), Kurşun(Pb) ve Kobalt(Co)’ınkonsantrasyonlarının 2006 ve 2017 yılları arasında azaldığı görüldü. Fakat bu azalmaya rağmen karayosunlarındaki ağır metal konsantrasyonları hala yüksektir.
- MakaleAçık Erişim2022Electric Vehicle Charging Station Infrastructure on the Basis of Provinces in Turkey: Analysis through the Metrics
Cakmak, Recep; Turan, Abdullah
The fact that fossil fuels are exhaustible and harmful to the environment, the goals of constituting a sustainable and cleaner environment, and developments in battery technologies have led to a tendency towards electric vehicles instead of the vehicles which have traditional internal combustion engines working with fossil fuels. Especially in the last five years, electric vehicle (EV) sales have increased, and this increase is expected to continue increasing in the coming years. The increasing number of electric vehicles leads to the need for EV charging stations. To make strategic plans, to guide investors and to provide the appropriate infrastructure for the electric vehicle customers, the infrastructure of electric vehicle charging stations in each region needs to be analyzed in detail. In this study, the quantitative situation of the electric vehicle charging station infrastructure on the basis of provinces in Turkey as of the end of 2020 is discussed and two new metrics which use to evaluate EV charging station infrastructure are proposed. In this context, the EV charging station status is presented with tables and infographic maps through the metrics in the literature used in the evaluation of the EV charging station infrastructure and the metrics proposed in this study. 81 provinces of Turkey are compared and presented in terms of EV charging station infrastructure through the metrics. It is foreseen that the obtained and presented findings in this study will be beneficial to electric vehicle customers, electric vehicle charging station investors, the government and other public institutions that could be developed the strategy to increase the proliferation of electric vehicles. In addition, this publication might be used as a reference study to track the pace of improvements in the EV charging station infrastructure and to compare the improvements with 2020.
- MakaleAçık Erişim2022Social Capital Measurement in Turkiye: Creating an Index by Province
Pilatin, Abdulmuttalip; Ayaydin, Hasan
The aim of the study is to create a social capital index on the basis of 81 provinces covering the years between 2007-2018 in Turkiye. While creating the social capital index, the method of creating the social capital index obtained from 2 networks and 2 norm variables, which was also used in previous studies, was applied. While the number of foundations and associations on a provincial basis was used as network variables, the rate of voting in parliamentary elections and the rate of response to WVS surveys were used as norm variables. In order to perform principal component analysis, the collected data was entered into the SPSS 23 package program, and the relevant analysis was performed. For this purpose, principal component analysis was applied for the years 2007, 2011, and 2018, when parliamentary general elections were held, and the first component that emerged was taken as an indicator of social capital index. Since social capital does not change in a short period of time for countries, regions, and cities, the index values for the years between 2007, 2011 and 2018 were created with the linear interpolation method using the data, as applied in similar studies. Positive ones among the index values created on the basis of provinces indicate a high level of social capital, while negative values indicate a low level of social capital. When the social capital index values of 2007 and 2018 are examined, it is observed that the social capital levels of the provinces have increased over the years, although there has not been much change in the index values on a provincial basis over the years.
- MakaleAçık Erişim2022Evaluation of potential rock falls with three-dimensional analysis: Example of Oltanbey and Hasanbey districts (Gümüşhane city center)
Alemdağ, Selçuk; Kara, Rasim Taylan; Bostanci, Hasan Tahsin
The central district campus of Gümüşhane, located on the Trabzon-Erzurum Highway, has a steep topography, and because of the effect of climatic and morphological structure, frequent rockfall events can cause loss of life and property from time to time. For these reasons, the slopes in some parts of the Oltanbey and Hasanbey districts of the central district of Gümüşhane, which pose a great threat in terms of rockfall potential, were chosen as the study area. In this study, three-dimensional rockfall analyzes were carried out using the RocPro3D program on the lines determined in the rockfall source zones with a high probability of rockfall. As a result of the analysis, it was determined that the rock blocks rolled from the O1, O2 and H1 source rock lines determined at the upper elevations of the study area threaten the settlements and road networks in Oltanbey and Hasanbey districts. With the 3D rockfall analysis, steel barrier was applied as a precautionary structure in the areas determined to be under the risk of rockfall, and the analyzes were carried out again considering the precautionary structures. By examining the results of the analyzes, the safest and most economical different barrier types have been proposed to eliminate the danger of rockfall.
- MakaleYalnız künye2022GIS-based determination of potential instabilities and source rock areas on the Torul-Kürtün (Gümüşhane) motorway, rockfall, and protection structure analyses
Alemdag, Selcuk; Bostanci, Hasan Tahsin; Gacener, Elif
The Torul-Kürtün-Tirebolu motorway, one of the alternative routes for access between the Eastern Anatolia Region and the Black Sea Region, has an important traffic potential in this respect. However, rockfall events that occur frequently in almost every season especially in the part of the route between Torul and Kürtün may occasionally cause loss of life and property and lead to disruption in transportation in a much more common way. Departing from this point, the parts of the motorway that pose a greater threat in terms of slope instability and rockfall potential were selected as the study area. Instability maps produced by the kinematic analysis results showed that the probability of toppling type failure in the study area was quite higher, while the general results were as follows: the probability of toppling type failure was found in 204 different locations and approximately 97,900 m2 of area. Taking account of geographic information system (GIS)–based final instability maps, profile lines were determined for potential rockfalls in the instability-intense source rock areas. The profile lines which were determined were analyzed two-dimensionally in the RocFall 7.0 computer program. The rockfall analyses revealed that the rolling rock blocks in the section SP7 shall remain on the surface of the slope, while the rock blocks in other sections shall reach the road route. The application of barrier types determined by barrier sensitivity analysis on profile lines will minimize or completely prevent potential hazards.
- BildiriYalnız künye2022Assessment of Rapid Urbanization Effects with Remote Sensing Techniques
Yagmur, Nur; Dervisoglu, Adalet; Bilgilioglu, B. Baha; Ahmed, M.B.; Boudhir, A.A.; Kara, I.R.; Jain, V.; Mellouli, S.
Istanbul is the most populous city in Turkey. The population, which was approximately 5.5 million in 1985, has reached 15.5 million in 2020. Population growth is the most important factor behind human activities that put pressure on the environment. An increasing population means depletion of limited resources, increasing environmental problems, and rapid urbanization. In parallel with the increase in population and urbanization, there has also been an increase in demand for housing, leading to new residential areas in almost every district of Istanbul. This study examined the transformation from vegetation areas to residential areas between 1985 and 2020 in a selected region in Buyukcekmece, one of the 39 districts of Istanbul. The relationship between land use and land cover (LULC) change in the area and Land Surface Temperature (LST) change caused by urbanization was analyzed. It is seen that the built-up area has increased from 57.1 ha to 781.4 ha in 35 years. In every five years, an increase in surface temperatures was determined in parallel with increasing urbanization, and this increase was determined as about 5.4℃ from 1985 to 2020. Also, when the temperature data of the Buyukcekmece Meteorological station is analyzed, it is seen that there has been an increase of approximately 2 ºC in air temperatures in the last five years. In addition, movements were observed in the stability of structures in rapid urbanization areas after analyzing with the PSI time series InSAR method. The main causes were determined as construction sites around the buildings and geological conditions of the ground, which are triggered by urbanization.
- MakaleYayıncıda açık erişim2022Technical potential of rooftop solar photovoltaic for Ankara
Kutlu, Elif Ceren; Durusoy, Beyza; Ozden, Talat; Akinoglu, Bulent G.
Turkey, which has immense solar potential, has recently shifted towards solar energy and new renewable energy deployment regulations, including implementation and commercializing rooftop PV technologies. Thus, these require a detailed assessment to determine the power source's capability and convince the policymakers. To the authors' best knowledge, there is no available data or a city-based study for the rooftop PV potential in Turkey. Here, we present the first city-based rooftop PV potential study in Ankara. The technical PV potential calculations are sensitive to the suitable area ratio, module efficiency, and module area assumptions. This study proposes a new, free, reliable, and open-source model for estimating the rooftop PV potential, and it is adaptable to every roof type. The suitable roof area for PV panels is calculated using Helioscope software. Five different modules with different efficiencies and module sizes are modelled in Helioscope. The results showed that Ankara's total technical PV potentials for residential, public, and commercial buildings are 1.15 TWh/year, 55 GWh/year, and 26.8 GWh/year, respectively. Best results are obtained by Mono-Si Halfcut (M2) and Thin Film (M5) modules in residentials, M2 and Mono-Si Bifacial Modules (M3) in Public and Commercial Buildings.
