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Wyświetlanie 1-4 z 4
Tytuł:
Analiza porównawcza struktury sortymentowej drewna po stronie planu oraz jego wykonania na poziomie nadleśnictwa
Comparative analysis of timber assortment structure in the logging plan and its realisation at the level of the forest district
Autorzy:
Bruchwald, A.
Kłapeć, B.
Powiązania:
https://bibliotekanauki.pl/articles/1018507.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
struktura sortymentowa
nadlesnictwa
plan pozyskiwania drewna
drewno okragle
lesnictwo
szacunek brakarski
pozyskiwanie drewna
assortment structure
database use
logging plans
Opis:
Attempts to apply the proper method of grading estimations that would result in working out a good logging plan have been made for many years. Comparison of share of assortment groups in annual logging plan with its realisation usually shows significant differences. Presented research results from 3 forest districts prove the need of working out a new planning method that would widely utilise data on logging realisation which exist in computer databases of forest districts.
Źródło:
Sylwan; 2006, 150, 05; 24-29
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody określania struktury sortymentowej drzewostanów i ich wstępna ocena
Autorzy:
Bruchwald, A.
Kłapeć, B.
Powiązania:
https://bibliotekanauki.pl/articles/1022044.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
struktura sortymentowa
drzewostany
miazszosc drzewostanow
lesnictwo
struktura drzewostanu
assortment structure
volume measurement methods
analysis of methods
Opis:
Assortment volume determination in the forest district can be carried out with three methods based on individual tree, whole stand, and management division. The paper presents detailed characteristic and opportunity of the practical use of these methods. The authors conclude that application of the particular method depends on assumed aim and required accuracy.
Źródło:
Sylwan; 2005, 149, 10; 3-10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Drzewostany przeszłorębne w Lasach Państwowych
Overmatured stands in the State Forests National Forest Holding
Autorzy:
Kłapeć, B.
Miścicki, S.
Stępień, E.
Powiązania:
https://bibliotekanauki.pl/articles/1011730.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany przeszlorebne
struktura gatunkowa
gospodarka lesna
struktura wiekowa
funkcje lasu
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
lesnictwo
urzadzanie lasu
zapas drzewostanu
overmatured stand
state forests national forest holding
Opis:
The data stored in the State Forests NFH's database were used to investigate the structure of overmatured stands in the State Forests NFH. For the classification of overmatured stands, the definition used in forest management planning was adopted. As per the status of 2008, there were 252 513 hectares (3.6% of forest area of the State Forests NFH) and 84 505 580 m3 (5.0% of standing timber) of overmatured stands (with the exclusion of nature reserves). Differences in the proportion in the area of these stands were found between individual Regional Directorates of the State Forests, stands distinguished with regard to the dominant species or forest function. One of the reasons – specific for Poland – is the necessity to reduce final harvest in forest districts in such a way that, in the case of larger than planned intermediate felling, did not exceed the total yield.
Źródło:
Sylwan; 2009, 153, 09; 594-606
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja przewozów drewna nabywanego w jednostkach Lasów Państwowych
Optimization of the transportation of wood purchased in the State Forests units
Autorzy:
Kłapeć, B.
Tracz, W.
Janeczko, K.
Powiązania:
https://bibliotekanauki.pl/articles/986951.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
drewno
transport
odleglosc przewozow
optymalizacja
programowanie liniowe
wspomaganie decyzji
timber transportation
criterion of export distance
network analysis
linear programming
decision
support
Opis:
Since many years much attention has been paid to the rationality of wood transportation criteria due to the realization of social objectives. Identification and elimination of unnecessary haulage can reduce the total cost of transport and contribute to reducing fuel consumption, carbon dioxide emissions and accident risk. This paper concerns decision support for the allocation of available wood as a lot of irrationality of the existing wood transport operations has been observed. The aim of the study was to develop and test the method of optimizing the allocation of wood available in forest districts for selected groups of customers from over the country, taking into account the criterion of export distance (geography of purchase). The scale of the effects of applying the proposed optimization method is also presented. Data on sales of medium size S2A Scots pine wood in 2015 was used. A model of a two−dimensional transport task was built in order to optimize wood allocation. The road distance between the points where the wood was loaded and the points where it is processed was determined using the transportation network and network analysis performed in ArcGIS software. Linear programming was used to develop a software to support the allocation of wood to a group of selected customers nationwide. It was assumed that the benefits of optimization would be shared by whole group and not just by each customer individually. Changing existing supply locations can significantly shorten the average transportation distances up to 31% for particular customers (tab. 2), while for the whole group of analysed customers the reduction amounted to 14%. As a result of the proposed method, the transportation work would be reduced by 65 mio m3, which would reduce the average distance of timber exports by 15 km. This allows shortening of over 174 thousand of truckloads. The savings from the shortage of truck− loads will amount to over 1.1 mio l of diesel fuel, which is worth about 5 mio PLN (1.18 mio ).
Źródło:
Sylwan; 2017, 161, 10; 842-850
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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