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Wyświetlanie 1-2 z 2
Tytuł:
Morphological changes within road incision forms in the blowdown area in the Slovak Tatra Mountains after termination of intensive forest works
Autorzy:
Rojan, E.
Powiązania:
https://bibliotekanauki.pl/articles/294599.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
cart roads
recent morphogenetic processes
forest works
blowdown area
Slovak Tatra Mountains
Opis:
Natural environment of the Slovak High Tatra Mountains, including landforms, underwent a rapid change. On November 19, 2004, following a disastrous bora, a blowdown area was formed covering 12,600 hectares, and bearing nearly 3 million cubic metres of fallen wood. Necessary forest clearing works related to damage mitigation began in spring 2005. These consisted in cutting and taking down the wood using heavy machinery and vehicles. Intensive after-disaster works led, however, to changes in the depth and density of cart roads. The aim of this paper is to estimate the direction and rate of changes within road dissections after intensive forest works. To achieve this task, the results of measurements of the depth of road incision along selected profiles situated at places differing by inclination and the type of exploitation were used. The collected data point to dominant, although minor role of accumulation processes over erosive ones, the latter being important during the period of relatively not intensive road exploitation. The most important factor contributing to such a denudation balance of gently inclined (up to 20 centigrade) roads appears to be human impact, dominating over properties of natural environment. Hence, termination of intensive road exploitation and introduction of anti-erosive measures, such as steps on steeper (more than 15 centigrade) road segments, are most effective when preventing erosion processes within the latter in the blowdown area in the Slovak High Tatra Mountains.
Źródło:
Landform Analysis; 2009, 10; 117-123
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ czynników organizacyjnych na wydajność eksploatacyjną harwestera
Effect of organizational factors on harvester exploitation efficiency
Autorzy:
Błuszkowska, U.
Nurek, T.
Powiązania:
https://bibliotekanauki.pl/articles/989285.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
mechanizacja prac lesnych
pozyskiwanie drewna
harwestery
wydajnosc pracy
wydajnosc eksploatacyjna
czynniki organizacyjne
forestry mechanization
timber harvesting
organization of forest works
Opis:
High unit costs of mechanized timber harvesting are a major obstacle for the development of this process in Poland. Apart from that, other important factors include forests structure, work organization and principles of the forest utilisation in the State Forests. Fragmentation and dispersal in the superintendence economic tasks related to the acquisition of wood affect the reduction of the degree of use of the machine during the working day. In this study, we paid particular attention to the harvester runs between successive tasks and between tasks and bases of the night stopover. The above−mentioned organizational factors can substantially affect the performance of the machine and their potential reduction could improve the economic efficiency of the use of harvesting machines in the Polish forests. The simulation calculations assumed fixed total area covered by the work of logging and fixed total amount of acquisitions. The parameters of the variables in the calculation was the number of tasks performed and the number of bases of the night stopover. Change in the previous parameter was clear with the volume of a single task and the distance between them. The paper discusses the results of research on the impact of these parameters on the multioperational machine operating efficiency. Reducing the number of jobs (increasing their size) causes significant increase in harvester efficiency. In extreme cases, it may be up to about 20%. The article also points to the possibility of better organization of work and thereby the economic effects of the use of harvesting machines in selected forest areas. Deciding on the organization of work in a specific forest district one should however also take into consideration principles of the forest utilisation.
Źródło:
Sylwan; 2016, 160, 06; 443-451
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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