Applicability of the GRASP metaheuristic method in designing machine trail layout

Søvde, Nils Egil; Løkketangen, Arne; Talbot, Bruce

doi:10.1080/21580103.2013.839279

Cited by 10 publications

(9 citation statements)

References 16 publications

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“…Currently, some harvest-planning activities, such as allocation of roads, yards, and skidding trails receives little interest in forestry planning, even in certified timber companies. In many cases, harvest planning is done empirically, considering the manager's experience and available field information to support decision making [10].…”

Section: Introductionmentioning

confidence: 99%

“…Decisions about spatial arrangement and optimum density of roads, yards, and skid trails are complex problems due to great species diversity, trees size, forests types, among other factors [13]. Identification of optimal wood transport and storage network is a key element, and modern optimization techniques can handle this task in a more rational way [10]. In economic terms, the forestry sector should employ techniques that make harvesting processes more efficient [9].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Skid Trails and Log Yards on the Amazon Forest

Sales

Gonzáles

Martins

et al. 2019

Forests

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Research highlights: We used Dijkstra Algorithm (DA) to define optimal allocation of yards in order to minimize total skid-trail’s distance in the Amazon Forest. DA minimized trails’ distances and associated transportation costs, leading to an even smaller value when the current planning was disregarded and suggesting the reduction of deleterious environmental externalities. Background and objectives: We sought to answer if it is possible to optimize distances and intrinsic costs in the management of Amazonian forests using DA. The objective was to minimize skid trails distances by best allocating yards using DA and to compare four scenarios of forest harvest planning in the Brazilian Amazon. Materials and methods: Tree census data from Gênesis-Salém Farm, state of Pará, Brazil, were used. The yards and roads located by Grupo Arboris (scenario 1) were compared to three alternative scenarios in terms of total skid distance, trails and road densities, and skidding costs for three successive harvests, seeking to minimize total skid-trails’ distance. Alternative scenarios were to keep the number of yards within work units (WU) and place them in the edge of existing roads (scenario 2); keep the number of yards within each WU (scenario 3); and place 23 yards, disregarding the current planning (scenario 4). Results: Total skid-trail’s distance, number of trees above optimal extraction distance and densities of skid trails and roads were smaller in scenarios 2, 3, and 4, compared to the current yard allocation (scenario 1). Scenario 4, with fewer restrictions, reduced skid-trails’ distances by 23%. Harvest costs decreased from scenario 1 to 4 in all three harvest cycles. Conclusions: DA allowed optimized distribution of yards and skid trails and generated efficient results for harvest planning. This reinforces the importance of optimized planning, which establishes satisfactory results in the effort to reduce costs and environmental impact keeping high efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Skid Trails and Log Yards on the Amazon Forest

Sales

Gonzáles

Martins

et al. 2019

Forests

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“…While cable-yarders minimise impact to the slope by partially suspending the trees during extraction, skid trail construction is a matter of some environmental concern [53] and a novel method of monitoring the extent of soil displacement arising from it has recently been tested in this area using drones [54]. Skid trails can be de-activated through a number of means with varying results [55,56] and at various costs [57], although a reduced need for a skid trails in conjunction with improved planning procedures is the preferable option [58]. Norway is renowned for its salmonid populations, which are associated with almost all the country's watersheds.…”

Section: Soil and Watermentioning

confidence: 99%

“…Terrain models derived from ALS data have been shown to be useful in locating effective extraction trails [58] or timber landings [61], thereby increasing efficiency and reducing both site impact like rutting and compaction [62] as well as emissions [63] arising from unnecessary terrain transport. Detailed surface features not distinguishable from ALS data with a resolution of 2-5 points m −2 need to be quantified with specialized sensors, e.g.…”

Section: Soil and Watermentioning

confidence: 99%

Forest Operations and Ecosystems Services in Norway � A Review of the Issues at Hand and the Opportunities Offered through NewTechnologies

Astrup¹,

Talbot²

2015

JGE

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It is widely recognized that forests should be managed inter alia for the provision of timber, biomass for energy, bio-chemicals, biological diversity, carbon storage, water purification, outdoor recreation and other ecosystem services. Forest operations are the most costly part of forest management and at the same time can be traced to most of the negative externalities on the environment often with strong visual impacts, especially in steep terrain. This paper reviews emerging technology-based engineering solutions that may reduce the impact of forest operations on the environment while increasing the efficiency of operations resulting in an overall higher level of forest ecosystem service provision. Advances in forest machine control and automation systems, and the availability of remotely-sensed high resolution data now provide considerable potential to improve the management and precision of forest operations. Improved planning procedures and more precise operations offer a considerable opportunity for mitigating environmental damage. Accurate positioning of operations machinery allows for the generation

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“…The results showed that the net production rate and the unit cost, considering the net production in 980 m skidding distance, were 16.58 m 3 and 8.03 USD·h -1 , respectively. Søvde et al (2013) investigated the applicability of the Greedy Randomized Adaptive Search Procedure (GRASP) metaheuristic method in designing the machine trail layout. The optimization is done with a greedy constructive heuristic and a GRASP metaheuristic, and the results of the two solution techniques are compared.…”

mentioning

confidence: 99%

Determination of forest skid trail density in Caspian forests, Iran

Lotfalian¹,

Khosrozadeh²,

Hosseini³

et al. 2016

J. For. Sci.

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Calculation of Skid Trail Spacing (STS) is an important option to minimize the total costs of skidding. Construction of many skid trails increases the construction cost, it also results in more degradation on different levels in forests. On the other hand, by constructing less skid trails, winching cost will increase, and in many cases, the skidders will exit from skid trails. This research was carried out in four districts under management of Mazandaran Wood and Paper Industry Company with the aim of determination of Optimum Skid Trail Spacing (OSTS) for an HSM skidder. In this study, a continuous time study method to the nearest second with stop watch was used. The results indicated that the time modelling of winching was mainly affected by load volume and winching distance. By using the time modelling of winching, the winching cost is estimated and then by combining that with the skid trail cost graph, the OSTS graph is calculated. Finally, 95 meters is calculated as optimum skid trail density in this study.

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Applicability of the GRASP metaheuristic method in designing machine trail layout

Cited by 10 publications

References 16 publications

Optimization of Skid Trails and Log Yards on the Amazon Forest

Optimization of Skid Trails and Log Yards on the Amazon Forest

Forest Operations and Ecosystems Services in Norway � A Review of the Issues at Hand and the Opportunities Offered through NewTechnologies

Determination of forest skid trail density in Caspian forests, Iran

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