Decision support system to find a skid trail network for extracting marked trees

Parsakhoo, Aidin; Mostafa, Mohsen; Shataee, Shaban; Lotfalian, Majid

doi:10.17221/36/2016-jfs

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…Imani et al [38] compared the forest roads variants obtained by Dijkstra's method and the traditional method and found that by using the first method they obtained lower length and costs for 55% and 65%. Parsakhoo et al [39] obtained shorter routes by 12.03% in average, by using Dijkstra's algorithm. In this investigation, by using the method of the shortest route, longer routes were obtained in relation to the existing network that is laid in a traditional way.…”

Section: Variant IIImentioning

confidence: 99%

Winching Distance in Function of the Optimization of Skid Network

Ljubojević

Danilović

Marčeta

et al. 2018

SEEFOR

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background and purpose: Optimisation of skid road network is very important in forest utilisation because transport is considered to be the most expensive part of timber production. Designing forest traffic infrastructure means positioning its location in the forest area using traditional or modern methods. Many factors influence the skidding costs, and winching distance is one of them. The use of modern techniques gives an opportunity to forest practitioners that simulate different network variants and choose the most appropriate ones. Materials and Methods: The research object is Compartment 27, which belongs to Forest Administration Unit "Prijedor", with the area of 46.72 ha. Investigation is divided into the phase of field work and the phase of designing secondary forest road network variants in the office. Field work includes the traditional and Global Positioning System (GPS) marking of trees for cutting and the creating of Geographic Information System (GIS) database. In relation to spatial distribution of trees for cutting, skid roads and skid trail networks are laid by using the GPS. The new scondary road network is laid in the field and compared with three simulated variants of secondary road network that are laid by ArcGIS 10.3. Secondary road network is planned by using Network Analyst tools and Shortest path method that is based on Dijkstra's algorithm. These variants are simulated based on different average winching distances of 10, 20 and 30 m. results: The area of the compartment is divided into two transportation zones. Total length of the secondary road network designed in the traditional way is 4816 m, thus achieving the secondary openness of 103 m•ha -1 . In simulated Variant I, with winch pulling distances of 20 m, the total length of secondary roads is 5590 m with costs of 14352.62 €, in Variant II with winching distance of up to 40 m length of secondary roads it is 3228 m with costs of 7426.78 €, and in Variant III with winch rope length of up to 60 m, the length of roads is 2219 m, with costs of 4400.89 €. The achieved mean skidding distances are relatively similar in all variants. When taking into account the average length of the winch rope, considering all three new-design variants, it can be said that there is almost no difference in productivity and skidding costs. conclusions: Mean winching distance has influence on skidding costs, but only in variants where mean skidding distance is decreasing. Smaller winching distance is justified only from the aspect of work humanization. Small differences in skidding costs between variants have no practical significance except for large quantities of wood assortments.

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Section: Variant IIImentioning

confidence: 99%

Winching Distance in Function of the Optimization of Skid Network

Ljubojević

Danilović

Marčeta

et al. 2018

SEEFOR

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“…Several previous authors have considered harvesting at individual tree levels, but their studies were focused on stand management rather than landscape restoration [13][14][15][16][17][18]. The studies by Pukkala et al [15], Pukkala and Miina [16], Vauhkonen and Pukkala [17], and Wing et al [18] were focused on the selection of individual trees to be thinned using either a deterministic or a heuristic algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…To reduce the problem size, the trees accessible to each landing were limited. The tree level problem addressed by Parsakhoo et al [13] in the Hyrcanian forests of Iran also sought to minimize skid trail length to avoid environmental impacts using multi-objective criteria analysis and network programming but did not consider landing costs. A tree-level solution was proposed by Contreras and Chung [19] to reduce the crown fire potential in stands dominated by Douglas fir (Pseudotsuga menziesii (Mirb) Franco), ponderosa pine (Pinus ponderosa Dougl.…”

Section: Introductionmentioning

confidence: 99%

Landscape Restoration Using Individual Tree Harvest Strategies

Schriver,

Sessions,

Strimbu

2024

Sustainability

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Western juniper (Juniperus occidentalis Hook.) is a native species west of the Rocky Mountains that has become noxious as its area increased ten times in the last 140 years. Restoration of the landscapes affected by the spread of juniper through harvesting poses several challenges related to the sparse spatial distribution (trees per hectare) of the resource. Therefore, the objective of the present study is to develop a harvest scheduling strategy that converts the western juniper from a noxious species to a timber resource. We propose a procedure that aggregates individual trees into elementary harvest units by considering the location of each tree. Using the coordinates of each harvest unit and its corresponding landing, we developed a spatially explicit algorithm that aims at the maximization of net revenue from juniper harvest. We applied the proposed landscape restoration approach to two areas of similar size and geomorphology. We implemented the restoration algorithm using two heuristics: simulated annealing and record-to-record travel. To account for the closeness to the mill, we considered two prices at the landing for the juniper: 45 USD/ton and 65 USD/ton. Our results suggest that restoration is possible at higher prices, but it is economically infeasible when prices are low. Simulated annealing outperformed record-to-record travel in both study areas and for both prices. Our approach and formulation to the restoration of landscapes invaded by western juniper could be applied to similar instances where complex stand structures preclude the use of traditional forest stand-level harvest scheduling and require a more granular approach.

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An eco-efficient and economical optimum evaluation technique for the forest road networks: the case of the mountainous forest of Metsovo, Greece

Tampekis

Samara

Sakellariou

et al. 2018

Environ Monit Assess

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The sustainable forest management can be achieved only through environmentally sound and economically efficient and feasible forest road networks and transportation systems that can potentially improve the multi-functional use of forest resources. However, road network planning and construction suggest long-term finance that require a capital investment (cash outflow), which would be equal to the value of the total revenue flow (cash inflow) over the whole lifecycle project. This paper emphasizes in an eco-efficient and economical optimum evaluation method for the forest road networks in the mountainous forest of Metsovo, Greece. More specifically, with the use of this technique, we evaluated the forest roads' (a) total construction costs, (b) annual maintenance cost, and (c) log skidding cost. In addition, we estimated the total economic value of forest goods and services that are lost from the forest roads' construction. Finally, we assessed the optimum eco-efficient and economical forest roads densities based on linear equations that stem from the internal rate of return method (IRR) and have been presented graphically. Data analysis and its presentation are achieved with the contribution of geographic information systems (GIS). The technique which is described in this study can be for the decision makers an attractive and useful implement in order to select the most eco-friendly and economical optimum solution to plan forest road network or to evaluate the existing forest transportation systems. Hence, with the use of this method, we can combine not only the multi-objective utilization of natural resources but also the environmental protection of forest ecosystems.

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Decision support system to find a skid trail network for extracting marked trees

Cited by 9 publications

References 29 publications

Winching Distance in Function of the Optimization of Skid Network

Winching Distance in Function of the Optimization of Skid Network

Landscape Restoration Using Individual Tree Harvest Strategies

An eco-efficient and economical optimum evaluation technique for the forest road networks: the case of the mountainous forest of Metsovo, Greece

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