Forest operations can lead to increased runoff and soil loss on roads skid trails. The aim of this study was evaluate the effectiveness two erosion control treatments applied different segments trails following six natural rainfall events. A total 162 plots 10 m long by 4 wide were established in a Hyrcanian deciduous forest assess ground-based harvesting traffic. experimental setup consisted t...

economic and environmental logging is important for sustainable wood production in the caspian forests, north of iran. predetermination of the skid trail network and directional felling is a usual recommended method to reduce logging impact. the aim of this study was evaluation of directional felling and finding factors effective on felling error. totally 135 trees were selected randomly for di...

This paper examines various control locations in heavy mining vehicles. Three trucks have been tested on a skid pad in both clockwise and anticlockwise directions. The skid lengths were measured after each trial. The primary focus of the study was the positioning of various controls and their relevance to various skid lengths. Some additional measures such as NASA-TLX scales were also used to m...

When the driving road surface condition suddenly changes from dry to wet, the driving wheels will slip due to much lower coefficient of friction, and thus cause the vehicle to skid. Unlike the popular anti-brake system which applies differential braking to wheels, the presented ant-skid Control properly distributes torques to wheels without braking. In comparison with many recently developed an...

forest harvesting operations for extracting of forest products in these trails, causing extensive damage in a wide range of soil and its productivity every year, therefore it is necessary to research about degradation of soil properties should be down. the aim of this study was investigate changes in the skid trails soil physical characteristics due to wheeled cable skidder traffic by measuring...

logging operations is an engineering system with the aim of maximizing efficiency and minimizing negative effects. this study was carried out in two compartments including 220 and 225 in namkhaneh district of kheiroudkenar watershed. in this study, damages resulted from skidding operation by timber jack 450c were evaluated. the results of this study showed that in two compartments 220 and 225, ...

Skidders are very cost-effective extraction machines, and winch-assist systems may extend their operating range to increasingly steep terrain. The use of skidder is relatively new, little information available about operational efficiency potential soil impact. A productivity disturbance study was carried out in Southland (New Zealand) gauge the benefits winch assistance by comparing performanc...