Comparison of two methods to assess heterogeneity of water flow in soils

0399618 - ÚH 2014 RIV SK eng J - Journal Article
Lichner, Ľ. - Dušek, J. - Dekker, L.W. - Zhukova, N. - Faško, P. - Holko, L. - Šír, Miloslav
Comparison of two methods to assess heterogeneity of water flow in soils.
Journal of Hydrology and Hydromechanics. Roč. 61, č. 4 (2013), s. 299-304. ISSN 0042-790X. E-ISSN 1338-4333
Grant - others:Slovak Scientific Grant Agency(SK) VEGA2/0073/11; Ministerstvo školstva, vedy výskumu a športu SR(SK) ITMS 26240120004
Institutional support: RVO:67985874
Keywords : degree of preferential flow * effective cross section * preferential flow in soil * infiltration experiment * radioactive tracer technique
Subject RIV: DA - Hydrology ; Limnology
Impact factor: 1.231, year: 2013
http://147.213.145.2/vc_articles/2013_61_4_Lichner_299.pdf

The heterogeneity of water flow and solute transport was assessed during radioactive tracer infiltration experiment in a black clay loam soil using modified methods to estimate the effective cross section (ECS) and the degree of preferential flow (DPF). The results of field and numerical experiments showed that these parameters characterized the heterogeneity of water flow in the soils unequivocally. The ECS decreases non-linearly and the DPF increases linearly with an increase of the bypassing ratio (ratio of macropore flow rate to total flow rate). The ECS decreased and the DPF increased with depth, which suggests an increase in the heterogeneity of water flow with depth. The plot of the DPF against ECS values calculated from the tracer experiment data was consistent with the relationship obtained by the numerical simulation assuming preferential flow in the neighbourhood of three probes.
Permanent Link: http://hdl.handle.net/11104/0226865