Search results for: S. Zieba
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Every year official data on forest area in Poland is published by the Statistics Poland. Some of this data is based on land use information contained in the Land and Property Registry (LPR). The aim of this study was to examine compliance between forest areas obtained from official land use maps and from aerial photos. Another purpose was to investigate the impact of forest complexes fragmentation...
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The paper presents assessment of the value of selected beech and fir stands by the classic method and using the value tariff in two ways. The aim of the work was to verify the suitability of the local tariff method based on the SILP forest database for the valuation of timber resources in forests. The measurements were carried out in the Beskidy Mountains (southern Poland). The reference sales value...
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This paper presents the method worked out to assess the value of growing stock in an exemplary forest district basing on the stand−level data available from the forest inventory databases. The method was designed for European beech and silver fir growing in the Polish part of the Carpathian Mountains. Sample data includes 28 stands, where quality classes of wood were assessed for 18,000 trees altogether...
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According to the current forest management manual, deadwood volume should be evaluated on 10% of sampling plots, located in different species−age layers, which are used for determining stand volume in a given forest unit. Sampling plot size differs depending on tree stand age and ranges from 0.005 to 0.05 ha. The results are reported for the entire forest district and by forest site type. The objective...
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Statistical representative method of inventory based on stratified sampling is used for elaborate forest management plans in Poland. Strata are created according to the dominant tree species and age of stands. First stratum include stands with age from 21 to 30 years and the interval in the next strata is 10 years. Sample plot size depends on stand age and varies from 0.005 to 0.05 ha. According to...
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The purpose of the stratification is to group stands basing on the homogeneity of the measured feature. During periodic forest inventory in Poland, strata are created on the basis of age and the main species in stand within the boundary of forest district. In this work an improvement of distinguishing the strata during the forest inventory is presented. Three variants are considered: (1) distinguishing...
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The paper assesses the performance of the risk models of the wind damage to the mountain forest stands located in the Tatra National Park (southern Poland). The models assume that the forest susceptibility to the damage from the wind depends on the characteristics of stands, their location and frequency of the occurrence of damage in the past. According to the methodology we built 5 variants of models,...
