Soil hydrophobicity variations with depth and particle size fraction in burned and unburned Eucalyptus globulus and Pinus pinaster forest terrain in the Águeda Basin, Portugal

Doerr, Stefan H.; Shakesby, Richard A.; Walsh, R. P. D.

doi:10.1016/0341-8162(96)00007-0

Cited by 196 publications

(125 citation statements)

References 18 publications

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“…Richardson & Hole 1978;Huffmann et al 2001) and furthermore being more similar to results reported from warm-dry Mediteranean-type climate rather than temperate-humid climate (e.g. Crockford et al 1991;Doerr et al 1996). Original Scientific Papers Soil & Water Res., 3, 2008 (Special Issue 1): S155-S164…”

Section: Soil and Water Res 3 2008 (Special Issue 1): S155-s164 Origmentioning

confidence: 52%

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

Wahl¹

2008

Soil & Water Res.

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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.

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Section: Soil and Water Res 3 2008 (Special Issue 1): S155-s164 Origmentioning

confidence: 52%

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

Wahl¹

2008

Soil & Water Res.

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“…In young pine forest, it is expected that SWR is limited to the decomposed organic floor layer (duff) including large amount of partially decomposed vegetal material (Doerr et al, 1996). However, the extent and the conditions under which hydrophobic compounds influence SWR of underlying mineral soils remain unclear (Buczko et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Application of minidisk infiltrometer to estimate water repellency in Mediterranean pine forest soils

Alagna

Iovino

Bagarello

et al. 2017

Journal of Hydrology and Hydromechanics

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Assessment of soil water repellency (SWR) was conducted in the decomposed organic floor layer (duff) and in the mineral soil layer of two Mediterranean pine forests, one in Italy and the other in Spain, by the widely-used water drop penetration time (WDPT) test and alternative indices derived from infiltration experiments carried out by the minidisk infiltrometer (MDI). In particular, the repellency index (RI) was calculated as the adjusted ratio between ethanol and water soil sorptivities whereas the water repellency cessation time (WRCT) and the specifically proposed modified repellency index (RI m ) were derived from the hydrophobic and wettable stages of a single water infiltration experiment. Time evolution of SWR and vegetation cover influence was also investigated at the Italian site. All indices unanimously detected severe SWR conditions in the duff of the pine forests. The mineral subsoils in the two forests showed different wettability and the clay-loam subsoil at Ciavolo forest was hydrophobic even if characterized by organic matter (OM) content similar to the wettable soil of an adjacent glade. It was therefore assumed that the composition rather than the total amount of OM influenced SWR. The hydraulic conductivity of the duff differed by a factor of 3.8-5.8 between the two forested sites thus influencing the vertical extent of SWR. Indeed, the mineral subsoil of Javea showed wettable or weak hydrophobic conditions probably because leaching of hydrophobic compounds was slowed or prevented at all. Estimations of SWR according to the different indices were in general agreement even if some discrepancies were observed. In particular, at low hydrophobicity levels the SWR indices gathered from the MDI tests were able to signal sub-critical SWR conditions that were not detected by the traditional WDPT index. The WRCT and modified repellency index RI m yielded SWR estimates in reasonable agreement with those obtained with the more cumbersome RI test and, therefore, can be proposed as alternative procedures for SWR assessment.

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“…Water repellency is broadly related to a soil's surface area and is thus more likely to occur on sandy-surfaced soils (Harper et al 2000), although there are reports on soils with more clayey textures (McGhie and Posner 1980). The occurrence of water repellency is also commonly linked to the surrounding vegetation (DeBano 1981;Wallis and Horne 1992), and although in some situations it can be exacerbated by wildfire (DeBano 1981), this effect is not always consistent (Doerr et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Eucalyptus reforestation induces soil water repellency

Walden¹,

Harper²,

Mendham³

et al. 2015

Soil Res.

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Abstract. There is an increasing interest in eucalypt reforestation for a range of purposes in Australia, including pulpwood production, carbon mitigation and catchment water management. The impacts of this reforestation on soil water repellency have not been examined despite eucalypts often being associated with water repellency and water repellency having impacts on water movement across and within soils. To investigate the role of eucalypt reforestation on water repellency, and interactions with soil properties, we examined 31 sites across the south-west of Western Australia with paired plots differing only in present land use (pasture v. plantation). The incidence and severity of water repellency increased in the 5-8 years following reforestation with Eucalyptus globulus. Despite this difference in water repellency, there were no differences in soil characteristics, including soil organic carbon content or composition, between pasture and plantation soils, suggesting induction by small amounts of hydrophobic compounds from the trees. The incidence of soil water repellency was generally greater on sandy-surfaced (<10% clay content) soils; however, for these soils 72% of the pasture sites and 31% of the plantation were not water repellent, and this was independent of measured soil properties. Computer modelling revealed marked differences in the layering and packing of waxes on kaolinite and quartz surfaces, indicating the importance of interfacial interactions in the development of soil water repellency. The implications of increased water repellency for the management of eucalyptus plantations are considered.

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Soil hydrophobicity variations with depth and particle size fraction in burned and unburned Eucalyptus globulus and Pinus pinaster forest terrain in the Águeda Basin, Portugal

Cited by 196 publications

References 18 publications

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

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

Application of minidisk infiltrometer to estimate water repellency in Mediterranean pine forest soils

Eucalyptus reforestation induces soil water repellency

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