Variability of water repellency in sandy forest soils under broadleaves and conifers in north-western Jutland/Denmark

Niels Arne Wahl
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Niels Arne Wahl: Department of Civil Engineering, Aalborg University, Aalborg, Denmark

Soil and Water Research, 2008, vol. 3, issue SpecialIssue1, S155-S164

Abstract: Soil water repellency has important consequences for ecological and hydrological properties of soils and usually retards infiltration capacity and induces preferential flow. This phenomenon has been known to occur on a wide range of sites under a variety of climatic conditions. The objective of this study was to investigate and characterize soil water repellency on forest sites with identical substrate and climatic conditions, differing in tree age and species. In the Vester Torup Klitplantage, an area comprising a conifer dominated forest plantation stocking on sandy deposits in a coastal setting near the Jammer Bay in north-western Jutland/Denmark, four different forest plots were investigated for water repellency effects four times in 2005. To measure soil water repellency, the water drop penetration time test and the critical surface tension test were carried out. Both tests revealed a seasonal variability in water repellency, exhibiting the highest water repellency for the upper 10 cm of the soil during the summer months, whereas the variability between the different plots seems to be less significant. There was no coherence between humus forms, thickness of litter layer and water repellency.

Keywords: critical surface tension; Denmark; forest soils; hydrophobicity; water drop penetration time; water repellency (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:3:y:2008:i:specialissue1:id:1407-swr

DOI: 10.17221/1407-SWR

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