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001-es BibID:	BIBFORM059022
035-os BibID:	(WoS)000233353300011 (Scopus)27844477886
Első szerző:	Püspöki Zoltán (geológus)
Cím:	The statistical relationship between unconfined compressive strengths and the frequency distributions of slope gradients : A case study in northern Hungary / Püspöki, Zoltán, Szabó, Szilárd, Demeter, Gábor, Szalai, Katalin, McIntosh, Richard W., Vincze, László, Németh, Gábor, Kovács, Imre
Dátum:	2005
ISSN:	0169-555X
Megjegyzések:	This paper focuses on the question of whether there is a deterministic connection between the slope gradient and unconfinedcompression strength (UCS) as a lithological factor and on describing the nature of this connection. Moreover, the authorsdetermined the sensitive statistical parameters in the statistical surface analyses. The surface analyses were carried out in an areaextending over 1500 km2 in northern Hungary and containing parts of the uplifted Palaeozoic and Mesozoic basement and thesemi-consolidated material of the Palaeogene and Neogene molasse sediments.The 67 geological formations of the area were grouped into 10 petrophysical categories characterised by unconfinedcompressive strength as a petrophysical parameter. The geological database was the digitalized geological map of NorthHungarian Region (1 :100000). The digital topographic database was based on 10 m contour lines of 1:50000 maps, the digitalelevation model was generated by kriging interpolation. Three topographic models were created with resolutions of 25-25,50-50 and 100-100 m per pixels.Evident correlation can be shown between the UCS and the relative frequency of the slope gradient. The adequate regressionprocedure is the power regression for low slope category values while logarithmic regression is applicable at high slope angles.Based on the characteristic of the relationship and the value of r2, slope category intervals can be identified the relativefrequency of which is proven to be determined by the UCS. These intervals are found to be between 4?10%, 10?16%, 16?22%,22?44% and over 44%.Using the determination equations of slope gradient between 4-10% and over 44%, the UCS of the bedrock can becalculated approximately as the average value of the two calculated results. So the quotient of the frequency of these twocategory intervals can be regarded as an important morphometric index for a given bedrock.From the aspect of petrophysical characteristics, the rock with UCS between 6 and 86 MPa were proven to be deterministicfor the slope development i.e. in the determination of the slope category frequencies. Applying the relative frequency of slopegradients a relative erosion resistance of the petrophysical categories can be calculated.Considering the determination coefficients, among the statistical parameters of the distribution of slope category values thestandard deviation, mode, mean and median proved to be determined by the UCS of the bedrock.
Tárgyszavak:	Műszaki tudományok Építőmérnöki tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Unconfined compressive strength Slope category Statistical surface analysis Topographic model Hungary
Megjelenés:	Geomorphology. - 71 : 3-4 (2005), p. 424-436. -
További szerzők:	Szabó Szilárd (1974-) (geográfus) Demeter Gábor (1980-) (történész, geográfus) Szalai Katalin McIntosh, Richard William (1978-) (geológus) Vincze László Németh Gábor Kovács Imre (1971-) (építőmérnök)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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