Spatial patterns of wetting characteristics in grassland sandy soil

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Title:Spatial patterns of wetting characteristics in grassland sandy soil
Creators:
Orfánus, Tomáš; orfanus at uh dot savba dot sk; Institute of Hydrology, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava, Slovak Republic.
Stojkovová, Dagmar; Institute of Hydrology, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava, Slovak Republic.
Rajkai, Kálmán; Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences, Herman Otto ut. 24, 1022 Budapest, Hungary.
Czachor, Henryk; Polish Academy of Sciences Institute of Agrophysics, ul. Doswiadczalna 4, P.O. Box 201, 20-290 Lublin, Poland.
Sándor, Renáta; Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences, Herman Otto ut. 24, 1022 Budapest, Hungary.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 64, 2, pp. 167-175
Uncontrolled Keywords:soil wetting patern, soil water repellency, hydraulic conductivity, sorptivity, arenosol

Abstract

In grasslands where organic and inorganic resources are alternating at scales of individual plants, the transient character is given to certain wetting properties of soil, which then become highly variable both in space and in time. The objective of presented study was to study wetting pattern within two soil horizons at 5-cm and 10-cm depths respectively and to examine how the wetting patterns relate to hydraulic conductivity determined by Minidisc infiltrometer at suction –2 cm, K(–2 cm). This characteristics is implicitly independent on antecedent soil water content (SWC) since it relates to steady infiltration phase but can be influenced by present soil water repellency (SWR). Field measurements were performed on July 27–28, 2010 on the grassland experimental site located near the village Sekule in Southwest Slovakia. The water drop penetration time (WDPT), SWC and tension Minidisc infiltration measurements were carried out on the 0.64 m2 plot in a regular 8 x 8 grid. The results showed that SWR and SWC influence each other and cause correlation between spatial patterns of studied soil wetting characteristics and between characteristics measured at the two soil depths. Further, it was found out, that calculation of K(–2 cm) according to Zhang may cause apparent correlation of K(–2 cm) with antecedent SWC, which is the artificial effect of sorptivity parameter in the equation on steady stage of infiltration process. This pseudocorrelation has disappeared after adopting of Minasny and McBratney (2000) approaches by calculation of K(–2 cm).

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Title:Spatial patterns of wetting characteristics in grassland sandy soil
Translated title:Spatial patterns of wetting characteristics in grassland sandy soil
Creators:
Orfánus, Tomáš; orfanus at uh dot savba dot sk; Institute of Hydrology, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava, Slovak Republic.
Stojkovová, Dagmar; Institute of Hydrology, Slovak Academy of Sciences, Dúbravská 9, 841 04 Bratislava, Slovak Republic.
Rajkai, Kálmán; Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences, Herman Otto ut. 24, 1022 Budapest, Hungary.
Czachor, Henryk; Polish Academy of Sciences Institute of Agrophysics, ul. Doswiadczalna 4, P.O. Box 201, 20-290 Lublin, Poland.
Sándor, Renáta; Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences, Herman Otto ut. 24, 1022 Budapest, Hungary.
Uncontrolled Keywords:soil wetting patern, soil water repellency, hydraulic conductivity, sorptivity, arenosol
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:64
Number:2
Page Range:pp. 167-175
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8650
Item Type:Article
Deposited On:28 Jun 2016 14:05
Last Modified:28 Jun 2016 12:05

Citation

Orfánus, Tomáš; Stojkovová, Dagmar; Rajkai, Kálmán; Czachor, Henryk; Sándor, Renáta (2016) Spatial patterns of wetting characteristics in grassland sandy soil. Journal of Hydrology and Hydromechanics, 64 (2). pp. 167-175. ISSN 0042-790X

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