Abstract
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 The forest truck roads, as one of the essential conditions for implementation of the planned biotechnical measures in the management unit, have to have an adequate quantity and quality. The aim of this research is determination of quantity and quality of the forest truck roads in the Management Unit (MU) „Gornja Rakitnica“, Forest Management Region (FMR) „Trnovsko“. The accessibility through wider categories of forest and total accessibility for MU have been calculated by the analysis of quantities indicators of the primary network of roads. The accessibility of the most important category of forests, from economy aspect, has been calculated – the forests with natural renewal. This accessibility amounts 12,7 m/ha. By the comparison of the values with the recommended minimum and optimum accessibility, it has been calculated that it is necessary to construct new forest truck roads. The data about quality have been obtained on the basis of terrain measurements in two forest truck roads „Rakitnica-Zućina vrela“ and „Pijevac – Borovac“. By the analysis of qualitative indicators in the analyzed roads it has been concluded that the network of forest truck roads in the MU „Gornja Rakitnica“ is passable i.e. it enables implementation of planned activities from all forest fields. The technical elements of the measured roads enable the values defined by technical regulations. The constructive elements: carriageway condition, slope cuttings, ditches and objects on the road are not in an adequate condition. If the adequate recovery works are not undertaken it could cause progressive deterioration of roads, which could influence functionality of roads transport of timber, access to compartments, etc… For the improvement of the condition of forest truck roads, the measures of recovery have been designed and the calculation of total and average costs has been carried out.
Highlights
The forest truck roads, as one of the essential conditions for implementation of the planned biotechnical measures in the management unit, have to have an adequate quantity and quality
In the forest truck road “Rakitnica-Zućina vrela”, the ditches have not been registered on the 47% of the length so the digging is necessary
In the forest truck road “Pijevac-Borovac” it is necessary to carry out cleansing on the length of approximately 1.200 m and digging is necessary on the length of approximately 5.800 m (Table 4, Figure 2)
Summary
The length and spatial allocation of the primary network of roads at the analyzed area will be obtained through recording by GPS device. The data about condition of constructive elements at the forest truck road have been collected on the basis of samples. The accessibility of high forest natural renewal has been calculated by recording and measuring of the total length of primary network of forest roads in MU “Gornja Rakitnica”. The analysis of existing condition of forest truck roads and determination of average costs of recovery of recorded forest truck roads have been done on the basis of the data from the terrain. These road sections have been shown in the (Figure 1) and will be subject of recovery
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