نتایج جستجو برای: forest road network

تعداد نتایج: 832498  

2013
Aidin Parsakhoo Ali Akbar Rafiei Majid Lotfalian Seyed Ataollah Hosseini

Determining the efficient density for forest roads is essential to decrease the costs of skidding and road constructing in forestry plans. In order to estimate the optimal density for road network in Dalak kheyl forest district (Mazandaran Wood and Paper Industries), we calculated the roading costs and hourly costs of Timber jack 450C and HSM 904 skidders. The length of skid trails was measured...

2014
Toshihiro Yamada Masahiro Niino Satoru Yoshida Tetsuro Hosaka Toshinori Okuda

Various international bodies and non-governmental organizations (NGOs) have proposed guidelines for safeguarding biodiversity. Nevertheless, quantitative criteria for safeguarding biodiversity should first be established to measure the attainment of biodiversity conservation if biodiversity is to be safeguarded effectively. We conducted research on the impact of logging on biodiversity of dung ...

تارویردی‌زاده, هاجر, نقدی, رامین, پوربابایی, حسن, نیکوی, مهرداد ,

Identifying herbaceous species and their composition at forest road edges and skid trails is an urgent task to prevent changes of natural and native composition of species and invasion of exotic species. The present study aimed to evaluate the herbaceous species cover grown on the forest road surface, cut and fill slopes and skid trail surface and their comparison with inside forest in order to...

Risks assessment of forest project implementation in spatial density changes of forest under canopy vegetation using artificial neural network modeling approach   Nowadays, environmental risk assessment has been defined as one of the effective in environmental planning and policy making. Considering the position and structure of vegetation on the forest floor, the main role of forest under ca...

حیدری, مهدی, نقدی, رامین, نوری, مهدیه, پوربابائی, حسن,

  In order to evaluate the effects of forest road on vegetation and some soil properties was selected a road with the length of 400 m. Type and number of regeneration species of trees and shrubs in plot area of 100 m2 and type and cover percentage of herbaceous species using minimal area method were recorded in plot area of 64 m2 and herbaceous species was classified into two groups using Two-W...

قاسمی آقباش, فرهاد, ملکی, بتول,

Construction of forest roads creates certain conditions in roadside that this situation has its positive and negative effects. This study was done to evaluate the ecological effects of forest road in Amygdalusscoparia forest reserve in Dehloran, Zarin Abaad. After selecting a suitable location for sampling, three transects in the direction perpendicular to the axis of the road in both sides was...

2005

Traffic load and transported quantity due to forest management were analysed on the forest roads in the forest district Dragatu{, SE Slovenia. On the basis of timber gravitating to particular sections, the traffic load and transported quantity were calculated for each of seven forest road sections. The cumulative traffic load is the highest on the section connected to the public road and the lo...

2017
Felicity A. Edwards Jessica Finan Lucy K. Graham Trond H. Larsen David S. Wilcove Wayne W. Hsu V.K. Chey Keith C. Hamer

The demand for timber products is facilitating the degradation and opening up of large areas of intact habitats rich in biodiversity. Logging creates an extensive network of access roads within the forest, yet these are commonly ignored or excluded when assessing impacts of logging on forest biodiversity. Here we determine the impact of these roads on the overall condition of selectively logged...

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