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Öğe Assessment and analysis of tree damage caused by forest road construction in a scotch pine stand: a case study from Alabarda/Bolu-Türkiye(Springer, 2023) Turk, Yilmaz; Bodur, MuecahitThe aim of this study is to determine the forest road construction area and environmental impact area and to determine the tree injuries caused by forest road construction, the filling area covering the stand, and the distances of the trees directly affected by the tree injuries from the road axis. For this objective, a 700-m section of the forest road number 194 within the boundaries of the Alabarda Forest Management Sub-Directorate (Bolu/Turkey) was selected as the study area. The forest road environmental impact area was found by determining the rolling boundary of the backfill material with the differential global positioning system (DGPS) device. In addition, the position of the trees in this area in relation to the road and their damage conditions were determined, and wound sizes were measured. As a result of the study, the road construction impact area was 46479 m2, the average spread distance of the backfill material was 50.34 m, the average distance of the damaged trees from the road was 28.25 m, and the average distance of the trees that were not damaged was 35.52 m. In addition, a total of 1477 trees were identified in the construction impact area and 427 of these trees were damaged. According to the results of the statistical analyses, a statistically significant positive correlation was determined between bark wound area and diameter. In addition, a statistically significant negative correlation was determined between the distance of the trees from the road axis and the wound area and the height of the backfill.Öğe Capabilities of using UAVs and close range photogrammetry to determine short-term soil losses in forest road cut slopes in semi-arid mountainous areas(Springer, 2024) Turk, Yilmaz; Ozcelik, Vuralhan; Akduman, EmirhanThe soil losses that are caused should be examined by monitoring the forest roads in the periods after they are built. In traditional soil loss determination studies that require intensive labour, due to difficulties in parcel setup, leaks from the connection points of the system, overflow of the material in the storage units and regular follow-up of the precipitation, etc., the system has its disadvantages. In this study, studies were carried out to evaluate the possibilities of using UAV and close range photogrammetry (CRP) methods, which are remote sensing techniques, and to determine the soil losses in forest road cut slopes in semi-arid mountainous areas. In addition, the advantages and disadvantages of the methods are discussed. A 100-m section of the secondary forest road was chosen as the study area. Data acquisition was carried out by UAV and CRP methods in the period of May 2020-November 2020. In the results of the study, the volumetric deformation per unit area results, a - 0.0060 m3m-2 erosion amount and a 0.0046 m3m-2 accumulation amount were determined by UAV. In addition, in the photogrammetric method, a - 0.0050 m3m-2 erosion amount and a 0.0031 m3m-2 accumulation amount were found. When both methods were compared temporally, the processes took approximately 2 times longer in the CRP method. In addition, while the ground sampling distance of DEMs and orthophotos produced with the UAV was 2 cm, it was obtained as 1 cm in the CRP method and terrestrial receptions were found to be 2 times higher resolution. According to the results obtained, the CRP method gives results that are more accurate in such studies.Öğe Effects of forest roads on large mammal behaviour(Polish Acad Sciences Inst Ecology, 2020) Turk, Yilmaz; Cometen, Selcuk; Keten, AkifForest roads are the most important infrastructural facilities to exploit forests that are renewable natural resources. They are of great importance for all kinds of scientific and technical interventions to be made to the forest. Despite the benefits of forest roads, they have great potential to cause degradation and fragmentation of natural habitats. The aim of this study is to investigate the effect of forest road technical features and intensity of use (traffic volume) on movements of mammals. From August 2017 to September 2017, a total of six forest roads and their surroundings were observed from fixed plots with wildlife camera traps. The study identified a total of twelve species of mammals. All together 589 individuals were counted from 461 wild animal images. Golden jackal, wild boar, and red fox are dominant species in the study area. The species composition of wild mammals was not strongly related to road characteristics. Drivers and wild animals use the same area but differ in time of use. It was also determined that wild animals adopted the road as a part of natural surroundings.Öğe Investigation of the Effect of Topography and Stand Structure on Windthrow Damages: A Case Study from Düzce, Türkiye(Kastamonu Univ, 2023) Turk, Yilmaz; Caliskan, Hamza; Cinar, Tunahan; Aydin, AbdurrahimAim of study: The aim of the study was to determined the tree volume and damage level in windthrow areas and to assess the impact of topographic factors and forest structure on windthrow damaged.Area of study: Our study was conducted within the Duzce Forest Management Directorate.Material and methods: The windthrow areas within the boundaries of Duzce Forest Management Directorate were obtained from extraordinary yield reports. According to windthrow data verified using Google Earth, the borders for each damage were determined and transferred to ArcMap. The relationships between windthrow areas and enviromental parameters were determined using digital maps and forest management plans. Correlation analysis was applied to find out the relationship between windthrow areas and topographic and forest characteristics. Additionally, variance analysis was performed to determine if there were differences in terms of dominant aspects and forest types between windthrow areas and amounts. T-tests were conducted to determine if there were differences between windthrow areas and amounts and the dominant wind direction. Based on the statistically significant results, an intersect analysis was applied to environmental parameters to generate a windthrow susceptibility map.Main results: Windthrow occurred mostly in the southwest aspect, in the Fir-Beech species and in the cd age classes. A statistically significant relationship (p<0.05) was found between windthrow area and tree diameter and elevation, and also between windthrow amount and elevation and site index. Moreover, significant relationships (p<0.05) were found in dominant aspect groups and species mix classes in with windthrow area.Research highlights: Windthrow damage is a dynamic process, and it is important to determine its relationships with topographic and stand characteristics in order to minimize damage to forests. Understanding the relationships between topographic and stand characteristics and windthrow areas can help preserve the biological structure of forests and provide guidance to forest managers.Öğe Orman sertifikasyonunun odun hammaddesi üretim faaliyetlerine etkilerinin incelenmesi (Bolu Orman İşletme Müdürlüğü örneği)(2022) Turk, Yilmaz; Sengoc, Erhan; Gültekin, Yaşar Selman; Enez, KorhanBu çalışmanın amacı, orman yönetim sertifikasının (OYS) odun hammaddesi üretimine etkilerini teknik ve çevresel açılardan araştırmak, sertifikasyon öncesi ve sonrası üretim işlerinin durumunu incelemektir. Çalışma alanı, 2013 yılında OYS alınmasına yönelik çalışmaların başlanarak 2014 yılı ortalarında tamamlandığı Bolu Orman İşletme Müdürlüğü (OİM)’dür. Çalışmada teknik elemanlar (29 kişi) ve orman üretim işçileri (21 kişi) ile gönüllülük esasına göre yüz yüze görüşme yöntemi ve anket tekniği kullanılarak veriler elde edilmiştir. Anket formları 5’li Likert ölçeğinde olup, katılımcıların temel bilgilerini ve OYS kapsamında teknik personelin ve orman işçilerinin OYS hakkındaki genel ve odun üretimi ile ilgili görüşlerini ortaya koymayı amaçlamaktadır. Anket sonuçlarına göre; OYS kapsamında üretim işçilerine verilen ilkyardım, temel iş sağlığı ve güvenliği eğitimlerinin sonuçlarının işçiler tarafından olumlu algılandığı ve konunun önemsendiği ortaya çıkmıştır. Üretim işçilerine sağlanan kişisel koruyucu donanımların orman alanlarında kesim ve diğer üretim faaliyetleri esnasında yaşanan iş kazalarında yaralanma şiddetlerini azalttığı belirlenmiştir. Ayrıca eğitimlerin sadece doğanın korunması için değil, üretimde çalışanların da bilgilendirilmesi için yapıldığı belirlenmiştir.
