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001-es BibID:BIBFORM063090
Első szerző:Centeri Csaba
Cím:Soil erodibility calculations based on different particle size distribution measurements / Csaba Centeri, Zoltán Szalai, Gergely Jakab, Károly Barta, Andrea Farsang, Szilárd Szabó, Zsolt Bíró
Dátum:2015
ISSN:2064-5031 2064-5147
Megjegyzések:In this study we focused on the factors affecting final outputs of the USLE (Universal Soil Loss Equation) model. In doing so, we conducted soil particle size measurements in different institutions (University of Debrecen, University of Szeged and Geographical Institute, Research Centre for Astronomy and Earth Sciences of the Hungarian Academy of Sciences) with a variety of methodologies (laser, aerometer and pipette methods) onvarious soil materials (sandy, loamy and clay). Statistical analyses of the eight examined soil samples have been shown some signifi cant and some non-signifi cant differences among the particle size measurements. This paper is aimed at i) to ascertain whether these signifi cant differences in particle size measurements cause signifi cant differences in soil erodibility calculations; and ii) to assess the amount of soil loss calculated by these K factors. The results suggest that regardless of the relatively small percentage between the smallest and the greatest K factor values, the amount of soil loss can be fairly high, especially when erosion occurs ona longer or steeper slope. In the present case, when we compare simulations results, the amount of soil loss is more important than the difference in percentage between the minimum and maximum values. Because the percentage of the difference can remain the same between the simulations, while the amount of soil lossincreases way beyond soil loss tolerance limits.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény hazai lapban
methods of particle size measurement
soil erodibility
USLE
Megjelenés:Hungarian Geographical Bulletin. - 64 : 1 (2015), p. 17-23. -
További szerzők:Szalai Zoltán Jakab Gergely Barta Károly Farsang Andrea (1967-2022) (geográfus) Szabó Szilárd (1974-) (geográfus) Bíró Zsolt
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001-es BibID:BIBFORM058734
Első szerző:Centeri Csaba
Cím:Comparison of particle-size analyzing laboratory methods / Centeri Csaba, Jakab Gergely, Szabó Szilárd, Farsang Andrea, Barta Károly, Szalai Zoltán, Bíró Zsolt
Dátum:2015
ISSN:1582-9596 1843-3707
Megjegyzések:Particle size distribution is one of the most influential factors of most soil physical and even some soil chemical characteristics. As modern measurement techniques are being introduced, the need for comparing new methods with older methodologies arises because comparability means data continuity. Here, three institutes conducted a comparison of particle size measurement among the laser, areometer and pipette techniques. The purpose of the comparison was to a) discover any differences among operators, laboratories, and techniques; b) identify if there were any differences and if they could be linked to soil type (e.g. high clay, loam, or sand content) or particle size range; and c) understand if the laser diffraction method gave results that were significantlylarger than the other methods of any size fraction. There was no statistically proven difference between the two operators examined based on the pipette method's result. The comparison of two of the institutes' pipette methods showed statistically significant differences for three of the eight samples tested. However, these differences only seemed to appear in the 0.01 mm to 0.02 mm particle size range. A technical comparison among all three methods resulted in significantdifferences in all cases except for one sample that had very high sand content and very low clay content. Finally, the laser diffraction method was analyzed to see if it measured a larger amount of the clay fraction, however, it instead overestimated the silt and the finesand (0.01 mm to 0.02 mm) fraction, not the clay fraction. Therefore, we conclude that different methodologies can providesignificant difference in particle-size measurement. Based on the results, we recommend creating a widely accepted patent for sample preparation (disaggregation,the use of peroxide or other agents, using ultrasonic or other methods) and for measuring techniques (a set of refractive and sorption indexes, using ultrasonic during the measurement, pump speed etc.).
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
areometer
laser diffractometry
pipette method
soil fractions
Megjelenés:Environmental Engineering and Management Journal. - 14 : 5 (2015), p. 1125-1135. -
További szerzők:Jakab Gergely Szabó Szilárd (1974-) (geográfus) Farsang Andrea (1967-2022) (geográfus) Barta Károly Szalai Zoltán Bíró Zsolt
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