Transformation of bed silts along lowland channel Gabčíkovo-Topoľníky and comparison of their saturated hydraulic conductivity values

Year, pages: 2019, 151 - 159

This contribution deals with the evaluation of bed silts permeability on channel Gabčíkovo-Topoľníky (G-T channel), the one from three great channels of channel network at Žitný ostrov (ŽO). The bed silts permeability in ŽO channel network significantly impacts on mutual interaction between channel network and groundwater at ŽO and it is expressed by parameter their saturated hydraulic conductivity (SHC). The paper compares the values of bed silts SHC which were extracted from G-T channel during period 1993–2018. The bed silts were extracted and obtained by two ways, as a disturbed samples and as an undisturbed samples. From disturbed samples on G-T channel were obtained bed silts SHC calculated according to empirical formulas of Bayer-Schweiger and Špaček, the valid values of SHC – Kp reached from 4.3 10-07–4.5 10-05 m s-1. From undisturbed samples of silts which were extracted along G-T channel from top, middle and bottom layer of silts, were determined the values SHC – Kn by measurement in laboratory – by the laboratory falling head method. The acquired values Kn for G-T channel reach from 5.2 10-08–4.2 10-03 m s-1. The current state of longitudinal distribution of bed silts SHC along the G-T channel was demonstrated as numerically and graphically, too.

Dulovičová, R. 2019. Transformation of bed silts along lowland channel Gabčíkovo-Topoľníky and comparison of their saturated hydraulic conductivity values. In Acta Hydrologica Slovaca, vol. 20, no.2, pp. 151-159. 2644-4690. DOI: https://doi.org/10.31577/ahs-2019-0020.02.0018

Dulovičová, R. (2019). Transformation of bed silts along lowland channel Gabčíkovo-Topoľníky and comparison of their saturated hydraulic conductivity values. Acta Hydrologica Slovaca, 20(2), 151-159. 2644-4690. DOI: https://doi.org/10.31577/ahs-2019-0020.02.0018

Publisher: Institute of Hydrology SAS, Dúbravská cesta 9, 841 05 Bratislava, Slovakia

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