scholarly journals Assessment of the state of a forest road network as a basis for making a program of forest management unit opening

2014 ◽  
pp. 59-71
Author(s):  
Milorad Danilovic ◽  
Dusan Stojnic
Keyword(s):  
Road Network ◽  
The State ◽  
M Cell ◽  
Buffer Zones ◽  
Management Units ◽  
Forest Roads ◽  
Forest Road ◽  
Cell Dimensions ◽  
Absolute Density

The planning of a forest road network is preceded by a detailed analysis of the current qualitative and quantitative state of forest roads, and above all, the determination of their spatial layout. This paper presents a categorization and assessment of the state of the existing roads in the FMUs "Zeljin" and "Bukovik II" and defining of the parts of management units with insufficiently developed networks of forest roads. The identification of unopened and insufficiently opened parts of management units was performed on the basis of density of a forest road network by departments and using a fishnet with 500 x 500 m cell dimensions and buffer zones of different widths around forest roads. The absolute density of a forest road network in the FMU "Zeljin" is 18.62 m/ha and in the FMU "Bukovik II" 12.03 m/ha. After placing buffer zones around forest roads, it was found that in the FMU "Zeljin" over 56% of the area is covered by the zone ranging from 0 to 200 m, while in the FMU "Bukovik II" this zone covers 48% of the area.

scholarly journals   Determination of correction coefficient of average skidding distance according to the existing road network in Alikia Soltan forest of Iran  

2013 ◽  
Vol 59 (No. 12) ◽  
pp. 475-478
Author(s):  
M. Rezaei ◽  
F. Shafizade ◽  
M.A. Rezaei
Keyword(s):  
Road Network ◽  
Correction Coefficient ◽  
Hyrcanian Forest ◽  
Topographic Map ◽  
Road Density ◽  
Forest Roads ◽  
Forest Road ◽  
Average Slope

One of the factors in planning forest roads is average skidding distance which is calculated in projects from the map, according to forest road density, however it has a low accuracy. In this study real average skidding distance and theoretical average skidding distance were measured to determine a correction coefficient in Alikia Soltan forest in Hyrcanian forest. In this study real average skidding distance was obtained by putting a meter on the axes of trails. Moreover, theoretical average skidding distance was calculated by means of road density according to the formula. Skid trails were recorded by GPS and overlaid to a topographic map by means of ArcGIS software. Results indicated that for the study area with the average slope of 27% and road density of 10.32 the correction coefficient is 2.1.

scholarly journals Development and perspective of the forest road infrastructure in the Republic of Macedonia

2015 ◽  
pp. 141-148
Author(s):  
Zdravko Trajanov ◽  
Ljupcho Nestorovski ◽  
Pande Trajkov
Keyword(s):  
Forest Management ◽  
Historical Development ◽  
Road Network ◽  
Scientific Research ◽  
Ecological Functions ◽  
Forest Roads ◽  
Optimal Density ◽  
Forest Road ◽  
Republic Of Macedonia ◽  
The Republic

This paper determines the historical development of infrastructure in the forest, streaming the development of the forest road network as a dominant element of infrastructure. The paper also covers the current condition with the openness of forests in Republic of Macedonia. On the basis of scientific research, the results from the optimal density of forest roads are determined. The paper also covers the period for which it is expected to achieve the goals of optimization which is the most efficient forest management without significantly affecting the ecological functions of the forest.

scholarly journals FOREST HARVEST SCHEDULING PLAN INTEGRATED TO THE ROAD NETWORK

CERNE ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Pedro Henrique Belavenutti Martins da Silva ◽  
Julio Eduardo Arce ◽  
Gustavo Valentim Loch ◽  
Hassan Camil David ◽  
Luan Demarco Fiorentin
Keyword(s):  
Road Network ◽  
Unit Cost ◽  
Production Costs ◽  
Production Unit ◽  
Timber Production ◽  
Road Maintenance ◽  
Harvest Scheduling ◽  
Management Units ◽  
Forest Road ◽  
Pinus Spp

ABSTRACT In industrial forest plantations, the spatial distribution of management units for harvest scheduling influences the timber production cost and the non-renewable resources consumption, due to issues related to transport logistic. In this context, this research aimed to formulate Integer Linear Programming (ILP) by means of the application of Floyd-Warshall network optimization algorithm to generate timber production routes, minimizing the production costs resulting from harvest activities and forest road maintenance. Then, scenarios were simulated considering different minimal harvest ages for Pinus spp. and Eucalyptus spp. stands. The planning horizon was five years with annual periodicity. The study area was 23,330 hectares of forests, located in Paraná state (southern Brazil). We compared the simulated scenarios according to the following parameter indicators: harvest income, building road network and the production unit cost. The decreasing of the minimal harvest age reduces the mean production of management units scheduled to be harvested, in other hand, it requires fewer roads to be built, and consequently increases the production unit cost. The solutions obtained by using ILP models presented an optimality gap lower than 0.1%.

scholarly journals Determination of the optimal density of the forest road network

2019 ◽  
Vol 65 (No. 11) ◽  
pp. 438-444 ◽  
Author(s):  
Tihomir Krumov
Keyword(s):  
Road Network ◽  
Good Condition ◽  
National Average ◽  
Network Density ◽  
Primary Forest ◽  
Optimal Density ◽  
Forest Road ◽  
Financial Difficulties ◽  
State Educational

The forest road network is invariably linked to forestry and logging, as it transports logging products and products needed for forestry activities. Constructing and maintaining it in good condition are essential. In view of the economic situation in the country and the financial difficulties faced by forest holdings in the construction and maintenance of the forest road network, it is necessary to determine the optimal hauling distance and the optimal density of the primary forest road network. The analysis of the forest road network in the territory of the State Educational Experimental Forestry Enterprise “Georgi Avramov”, Yundola village, showed that the density of the primary forest road network is several times higher than the national average, namely 20.31 m'·ha–1, yet it does not reach the optimal road network density calculated at the farm, of 30.9 m'·ha–1, at a hauling distance of 323.15 m.<br /><br />

scholarly journals A Topographic Wetness Index for Forest Road Quality Assessment: An Application in the Lakeland Region of Finland

Forests ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1165
Author(s):  
Katalin Waga ◽  
Jukka Malinen ◽  
Timo Tokola
Keyword(s):  
Boreal Forests ◽  
Road Network ◽  
Airborne Lidar ◽  
Lidar Data ◽  
Topographic Wetness Index ◽  
Forest Roads ◽  
Wetness Index ◽  
Forest Road ◽  
Airborne Lidar Data ◽  
Quality Assessments

Research Highlights: A Topographic Wetness Index calculated using LiDAR-derived elevation models can help in identifying unpaved forest roads that need maintenance. Materials and Methods: Low-pulse LiDAR data were used to calculate a Topographic Wetness Index to predict unpaved forest roads’ quality. Results: The results of this analysis and comparison of road-quality features derived from LiDAR data at resolutions of 1, 10 and 25 m for assessing road quality in the boreal forests of Finnish Lakeland show that the wetness index can predict road quality correctly in up to 70% of cases and up to 86% when combined with other auxiliary GIS-based variables. Conclusions: Road-quality assessments, using airborne LiDAR data, can greatly help forest managers to decide which sections of the ageing road network will benefit the most from maintenance, while reducing the need of field visits.

scholarly journals Comparisons of Estimated Circuity Factor of Forest Roads with Different Vertical Heights in Mountainous Areas, Republic of Korea

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1147 ◽  
Author(s):  
Hyeongkeun Kweon
Keyword(s):  
Road Network ◽  
Transportation Cost ◽  
Mountain Slope ◽  
Network Distance ◽  
Forest Roads ◽  
Forest Road ◽  
The Public ◽  
Average Value ◽  
Public Road ◽  
Mountain Terrain

Distance is one of the important factors in determining transportation cost and travel time, and it can be easily estimated by measuring the circuity of road networks. This study calculated the circuity factors to estimate the network distance for 27 forest roads (about 105 km) in South Korea. For this purpose, ridge, mid-slope, and valley roads were classified according to the construction location of the mountain slope, and the weighted and unweighted circuity factor (each 500-m section) were calculated. The average value of weighted circuity was 1.55: mid-slope roads (2.09), ridge roads (1.36), and valley roads (1.09). The average unweighted circuity factors were 1.61 for mid-slope roads, 1.21 for ridge roads, and 1.07 for valley roads. This study found that the circuity of the forest road network was most affected by the mountain terrain. In addition, the circuity factor increased with increasing network distance in the mid-slope roads but was not affected by the network distance in ridges and valleys. To improve the efficiency of transportation in the forest road network, it is important to locate the ladings and properly connect with the public road network.

scholarly journals Calculating the correction factor of skidding distance based on forest road network

2011 ◽  
Vol 57 (No. 11) ◽  
pp. 467-471 ◽  
Author(s):  
M. Lotfalian ◽  
E.H. Zadeh ◽  
S.A. Hosseini
Keyword(s):  
Correction Factor ◽  
Road Network ◽  
Road Density ◽  
Forest Road ◽  
The Road ◽  
Topographical Map ◽  
Arc Gis ◽  
The Mean ◽  
Gis Software

&nbsp; Average skidding distance for forest stands is an important parameter for the determination of the optimum road density and spacing. In this research the real mean skidding distance and theoretical mean skidding distance were measured to calculate the correction factor of skidding distance for Chafrood forest in Hyrcanian zone. The length and azimuth of skid trails from road and depot junction to forest interior were measured. Moreover, the position of skid trail was recorded by GPS. These skid trails with a buffer of 140 m were designed on a topographical map using Arc GIS software. Results indicated that the road spacing of 500 m in the study area resulted in a theoretical mean skidding distance of 125 m. For a real mean skidding distance of 525.9 m and for the mean slope of 40%, the correction factor was estimated to be 4.2.

Optimales Layout einer Walderschliessung

2016 ◽  
Vol 167 (5) ◽  
pp. 294-301
Author(s):  
Leo Bont
Keyword(s):  
Road Network ◽  
Spatial Arrangement ◽  
Problem Situation ◽  
Optimal Layout ◽  
Forest Road ◽  
The Road ◽  
Network Cost ◽  
User Friendly ◽  
Short Time

Optimal layout of a forest road network The road network is the backbone of forest management. When creating or redesigning a forest road network, one important question is how to shape the layout, this means to fix the spatial arrangement and the dimensioning standard of the roads. We consider two kinds of layout problems. First, new forest road network in an area without any such development yet, and second, redesign of existing road network for actual requirements. For each problem situation, we will present a method that allows to detect automatically the optimal road and harvesting layout. The method aims to identify a road network that concurrently minimizes the harvesting cost, the road network cost (construction and maintenance) and the hauling cost over the entire life cycle. Ecological issues can be considered as well. The method will be presented and discussed with the help of two case studies. The main benefit of the application of optimization tools consists in an objective-based planning, which allows to check and compare different scenarios and objectives within a short time. The responses coming from the case study regions were highly positive: practitioners suggest to make those methods a standard practice and to further develop the prototype to a user-friendly expert software.

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