Spatial patterns of wetting characteristics in grassland sandy soil

Tomáš Orfánus, Dagmar Stojkovová, Kálmán Rajkai, Henryk Czachor, Renáta Sándor

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8 Citations (Scopus)

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 × 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).

Original languageEnglish
Pages (from-to)167-175
Number of pages9
JournalJournal of Hydrology and Hydromechanics
Volume64
Issue number2
DOIs
Publication statusPublished - Jun 1 2016

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Keywords

  • Arenosol
  • Hydraulic conductivity
  • Soil water repellency
  • Soil wetting pattern
  • Sorptivity

ASJC Scopus subject areas

  • Water Science and Technology
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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