Wyniki wyszukiwania - BazTech

1

Zagrożenia dla linii kablowych podczas prac ziemnych na terenie leśnym

Zawodniak Józef J., Korzeniewicz Robert

Automatyka, Elektryka, Zakłócenia

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2022

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Vol. 13, nr 1(47)

54--59

PL

W artykule opisano wybrane zagadnienia związane z maszynami służącymi do uprawy gruntu leśnego w aspekcie projektowania i budowy linii kablowych. Przedstawiono ogólnikowo ich przeznaczenie i podano parametry techniczne związane z głębokością pracy. Następnie porównano zestawione dane z wymogami normatywnymi budowy linii kablowych, w celu określenia skali zagrożenia.

EN

The paper presents selected issues related to machines for cultivating forest soil in terms of the design and construction of cable lines. Their purpose is generally presented and technical parameters related to the depth of work are given. Afterwards, these data were compared with the normative requirements for the construction of cable lines in order to determine the scale of the threat.

2

Impact of alien tree species Quercus rubra L. on understorey habitat and flora: a study of the Silesian Upland (Southern Poland)

Chmura D.

Polish Journal of Ecology

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2013

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Vol. 61, nr 3

431--442

EN

One hundred and one stands of non-native red oak Quercus rubra L. were examined across various forest types with the objective to relate the influence of environmental variables on the abundance of this species and to characterise its impact on the species richness and proportion of functional groups of native plant species. Amongst randomly selected stands more than 50% were self-regenerating ones, i.e. seedlings were present. The cover of Q. rubra seedlings was positively correlated with light intensity (rs = 0.38, P <0.05) and negatively with the content of nitrogen (rs = –0.20, P <0.05) and loss on ignition (rs = 0.20, P <0.05) in soil. The cover of mature trees was positively correlated with the value of pH (rs = 0.22, P <0.05). Separate correlations with DCA scores of phytosociological relevés and the cover of red oak in each layer showed that the species influenced the floristic composition of forest vegetation. The cover of mature trees of red oak negatively affected both the number of understorey species (rs = –0.39, P <0.01) and the cover of shrubs (rs = –0.21, P <0.05) and herbaceous species (rs = –0.22, P <0.05). Q. rubra in the form of a mature tree had a negative influence on the cover of barochores, endozoochores and species of Grime’s CSR strategy. The cover of red oak’s seedlings was negatively correlated with the cover of annual species (rs = –0.21, P <0.05). Saplings of Q. rubra had a negative influence on the cover of dyszoochores (rs = –0.21, P <0.05) and was positively correlated with competitors (rs = 0.31, P <0.01), megaphanerophytes (rs = 0.27, P <0.05) and therophytes (rs = 0.25, P <0.05). The study showed that Q. rubra is a competitive species both as a mature tree and in the form of seedlings or small saplings and thus it can contribute to the reduction of biodiversity in forest communities.

3

Jakość wód na terenach leśnych w rejonie Nadleśnictwa Wołów

Paluch J., Pulikowski K.

Gospodarka Wodna

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2005

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Nr 9

366-371

PL

Opracowanie prezentuje wyniki wykonanych przez Autorów badań zmierzających do określenia wpływu opóźniacza odpływu zabudowanego na rowie odprowadzającym wody z terenu leśnego na jakość wody powierzchniowej płynącej oraz wody podziemnej na terenie przylegającym do cieku.

EN

The paper presents results of the carried out by the Authors investigations aimed at determination of influence of „run-off retar-ders" installed in the ditch dewatering the forest area on the quality of flowing surface water and of groundwater on the area adjacent to the ditch.

4

Bilanse wodne śródleśnych oczek wodnych

Kosturkiewicz A., Szafrański C., Korytkowski M., Stasik R.

Czasopismo Techniczne. Środowisko

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2002

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R. 99, z. 5-Ś

63--72

EN

The paper is based on the investigations carried out in the area of the Siemianice Experimental Forest Complex of Agricultural University of Poznań, in the catchments of two forest ponds.The site of the research is located within the Southern-Wielkopolska Lowland situated within the Wieruszowska Wysoczyzna. The ponds in focus are similar as far as their area is concerned i.e. the first one: 0,13 ha and the other one:0.10 ha, and depth reaching 1m. The catchment surface of the first pond measures 7.6 ha while the other one 19,4ha. The areas neighbouring the ponds are occupied by moist habitats and in the upper parts fresh mixed habitats covering 90% of the surface. The catchments are dominated by pine stands aging from 86 to 110 years. Pond 1 situated in a small size depresion is of thawed - out type. The other pond (number 5) situated at the foot of the morene slope is intensively fed by stream waters which provide a continuing water outflow from the pond in the course of the year. Field research comprising: measurements of both water levels in the ponds and groundwater levels, regular registration of outflows from pond 5 and pedological procedings was conducted in 1999/2000 and 2000/2001 hydrological years. The output of the research of water balances of the two small ponds were analysed against the background of and in relation to the characteristic groundwater levels of the neighbouring forest areas. Existing retentional capabilities of the catchments of the two discussed ponds indicate their varied influence, as small retentional reservoirs, on water management in the close forest habitats areas.Pond number 5 situated at the foot of a morene slope and intensively fed by stream waters, providing a continual and insignificantly changeable outflow from the pond in both half-years, shows only slight amplitudes of oscillations of water levels i.e. 0,4-2 cm. Fairly static water levels in the pond stabilize lowering water levels in the neighbouring forest areas, especially in the period of drought. The levels of the water in pond 1 are strictly connected with the existing groundwater levels in its catchment. The amplitudes of the oscillations of water levels in the pond are slightly lower than the ones of groundwater levels in the neighbouring forest habitats. In winter hydrological half-years, spring perionds and rainy summer seasons, the pond is fed by groundwaters, and at the time of summer and autumn droughts it feeds groundwaters itself. The results of the evaluations of water balances of the two catchments indicate that water circulation of pond 1 is more tightly connected with water cycling in the catchment than in case of pond 5. Varied water inflowsreaching the ponds are significant, apart from the amplitudes of oscillations of water levels in the ponds and groundwater levels and pond and catchments water retention connected with it. In water balance of pond 5, both in winter and summer half-years they present similar values due to continual stream water feeding process. The research shows that ground inflows to pond 1 are meaningfully varied and retained waters feed groundwaters of the neighbouring forest habitats in the periods of drought.