Wyniki wyszukiwania

1

Delay in the flow of plant debris on floodplains overgrown with shrub vegetation

100%

Hammerling M., Walczak N., Zawadzki P., Kaluza T.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2014

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tom 13

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nr 4

The study aims to analyze the statistical probability of the slowing down of the plant debris flow through an area rich in shrub vegetation during floods. The shrub density has a direct influence on water velocity. The study was conducted in a 2-meter section of an artificial hydraulic flume. 15 tests were made for each of the different-shaped elements. The artificial elements used were either rectangular or elliptical in shape. Tests were conducted for three different spacings of cylindrical elements imitating the shrub vegetation and for three different depths of the hydraulic flume. Analysis of the test results leads to the conclusion that an increase in the density of cylindrical elements does not always cause an increase in the flow time of plant debris. The study also shows that an increase in the water depth causes an increase in the flow time of elements imitating the thick debris, which is due to a decrease in the water flow velocity. The study also presents an analysis of the probability of plant debris being detained by the cylindrical elements imitating the shrubs. This probability was observed to be higher for rectangular than elliptical elements. It was also observed to be inversely proportional to the water depth. The obtained results indicate that the subject matter of the current study is very interesting and complex and merits further investigation.

2

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Analiz raboty sekcijj napornogo rukavnogo fil'tra pri povyshennom davlenii

100%

Osipenko V., Osipenko V.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2014

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tom 16

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nr 6

3

Experimental investigation of hydraulic resistance in pipe aerators

84%

Kalenik M., Morawski D., Stanko G.

Electronic Journal of Polish Agricultural Universities. Series Civil Engineering

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2006

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tom 09

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nr 4

4

Determination of characteristics of circular distributor valve piston pulp pump

84%

Kossenko-Belinskiy Y.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2010

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tom 10A

5

The influence of channel tortuousity on hydraulic resistance

84%

Cieslicki K., Lasowska A., Smolarski A. Z.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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2000

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tom 48

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nr 2

6

Model for hydraulic calculations for naturalised channels

84%

Rimkus A., Vaikasas S.

Journal of Water and Land Development

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1999

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nr 03

Naturalisation of channels - water receivers can increase their hydraulic resistance too much. Therefore the hydraulic calculations on such channels are necessary. The existing calculation methods are not sufficiently precise. In this paper the necessary development of these calculations is described.

7

Some physical parameters in relation to water extraction by roots of two pigeonpea genotypes

84%

Ogunremi L. T.

International Agrophysics

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1996

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tom 10

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nr 1

8

Badania miejscowych oporow hydraulicznych w ksztaltkach z PVC

67%

Kalenik M., Witowska B.

Acta Scientiarum Polonorum. Architectura

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2007

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tom 06

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nr 3

15-24

W artykule przedstawiono wyniki badań współczynników oporów miejscowych w wybranych losowo trzech kolankach i trójnikach z PVC. Badania przeprowadzono na wybudowanym w laboratorium stanowisku pomiarowym. Pomiary wykonano dla kształtek o kącie nachylenia 90°, wyprodukowanych przez dwóch producentów kształtek wodociągowych. Wyznaczone współczynniki oporów miejscowych z badań porównano ze współczynnikami oporów miejscowych, obliczonych według obowiązującej normy PN-76-M-34034 [1987].

9

Hydraulic resistance of air flow through wheat grain in bulk

67%

Kusinska E.