Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2025Snow cover detection using remote sensing techniques over different climate zones of Türkiye
Çakir, Günay; Bozali, Nuri; Sivrikaya, Fatih
Snow-covered land surfaces can be easily mapped using remote sensing technologies. Accurate estimation of snow cover on the land surface allows for the construction of water resource management today. Using Landsat TM/ETM + satellite images, this study tried to assess how much snowfall covered the soil in Trabzon, Gümüşhane, and Bayburt provinces between 1999 and 2023. Satellite images were classified into three categories using the ERDAS 9.1 TM software. These classes are classified as snow-covered surfaces, other places, and data loss (cloud-shadow). When performing image analysis, it was important to verify that the cloudiness rate in the images was less than 15%. Images with cloudiness rates of more than 15% were not used. Seasonal and annual trend analysis of snow-covered areas (SCA) over three distinct regions (Trabzon, Gümüşhane, and Bayburt) were examined using the Mann-Kendall test. When three distinct study regions were examined together, Bayburt had the highest SCA rate, followed by Gümüşhane and Trabzon. In all three fields, the highest SCA was recorded in 2000, while the lowest SCA was recorded in 2017. The trends noticed that SCA on both annual and seasonal scales did not reach the statistical significance level of 0.05. Although snowfall in Trabzon, Gümüşhane, and Bayburt was beneficial in the autumn and spring seasons, no statistically significant association was found. The research concluded that the existing data are inadequate to make any statements on the impact of global warming in the area. However, the study figured out that satellite data may be effectively used to identify snowy places as a result of the study. Comparable investigations need to be undertaken in regions with varying climates, utilizing diverse remote sensing data and classification methodologies.
- MakaleAçık Erişim2024Orman Ekosisteminin Su Üretim Değerinin Galyan Su Üretim Havzasında Değerlendirilmesi (Atasu Barajı)
Çakir, Günay; Sivrikaya, Fatih; Bozali, Nuri
Orman ekosistem hizmetleri; tedarik, düzenleyici, destekleyici ve kültürel hizmetleri bünyesinde barındırmaktadır. İnsanlar ve canlıların ekosistemden doğrudan veya dolaylı olarak elde ettiği faydalar çok çeşitlidir. Ekosistemin sunduğu düzenleyici hizmetler sürdürülebilir kalkınma ve insan yaşamı açısından önem arz etmektedir. Aynı zamanda ekosistem hizmetleri insan refahı ile yakından ilişkilidir. Yaşamın en temel taşlarından birisi de su kaynaklarıdır. Dünya yüzeyinde kullanılabilir suyun çok az olması ve su kaynaklarının insanlara sunduğu hizmetlerin artması bu önemi daha da artırmıştır. Su döngüsünün faydalı bir biçimde kullanılması için evapotranspirasyon süreçlerinin de belirlenmesine ihtiyaç duyulmuştur. Faydalı suyun depolanmasında barajlar inşa edilmektedir. Baraj havzaları içerisinde mevcut arazi örtüsünün korunması ya da geliştirilmesi gerekmektedir. Bu çalışmada, bazı ülkelerdeki içme suyu havzalarındaki ormancılık çalışmaları ile ekosistem hizmetleri arasındaki ilişkiler ele alınarak Trabzon ilinin içme suyu ihtiyacının yaklaşık %70’ini sağlayan Galyan (Atasu Baraj) havzasındaki orman ekosisteminin sürekliliği açısından değerlendirmelerde bulunulmuştur. Orman ekosistemi ile su üretiminin karşılıklı etkileşimlerine değinilmiştir.
- MakaleAçık Erişim2023Assessing Spatio-Temporal Change and Dynamics of Forest Ecosystem Succession Using Patch Analysis
Sivrikaya, Fatih; Çakir, Gunay
Aim of study: This study focuses on creating a secondary forest succession (SFS) map between 1972 and 2014 according to the Clementsian theory based on land cover, assessing the spatio-temporal pattern of forest succession change, and determining the factors affecting the forest ecosystem.Area of study: This study was conducted at the cermik Forest Enterprise (FE) in Diyarbakir city, located in the Southeastern Anatolia Region of Turkiye.Material and methods: Clementsian theory, Remote Sensing (RS), and Geographical Information System (GIS) were used to generate the SFS map. Patch Analyst 4.0 was used to determine changes in spatiotemporal patterns with landscape indices.Main results: The total forested area increased from 32405.1 ha (13% of the study area) in 1972 to 45054.7 ha (18% of the study area) in 2014, with a net increase of 12649.6 ha. It was determined that the progressive succession area was 87736.7 ha, the regressive succession area was 39216.5 ha, and the unchanged succession area was approximately 129989.6 ha. The number of patches increased over a 42 -year period.Research highlights: The forest ecosystem was more fragmented, with patches becoming more irregular, complex, and edgy.
- MakaleAçık Erişim2011Factors of land use/cover change: A case study from Turkey
Sivrikaya, Fatih; Çakir, Günay; Akay, Abdullah Emin
Land use/cover change impacts ecosystem services and functions such as forest health, biodiversity, and water production. Monitoring and assessing land use/cover changes provides an effective and accurate evaluation of human impact on the forest ecosystems. This study aims to determine spatial and temporal changes in land use/cover at a particular time period in a typical forest ecosystem of Turkey using geographical information systems (GIS). Specifically, the objective of this study is to analyze the main factors driving land use/cover change and the impacts of such changes in local and global perspective. Results showed that the total forested areas decreased from 5089 ha (41% of the study area) to 4426 ha (36% of the study area) during a 21 year period, which figures a net decrease of 663 ha (5%) forest areas and the average annual deforestation rate was 32 ha. Conifer forest (161 ha) completely transitioned to other cover types over 21-year period. Three major factors including distance from villages, distance from roads, and ground elevation were considered in evaluating forest disturbance. The results showed that these factors influence the reforestation/deforestation rates. Besides, forest disturbance was found to be closely related to distance from villages, distance from roads, and elevation.