Soil Water Repellency: Effects of Water Content, Temperature, and Particle Size

Jonge, Lis Wollesen de; Jacobsen, O. H.; Møldrup, Per

doi:10.2136/sssaj1999.03615995006300030003x

Cited by 238 publications

(208 citation statements)

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“…In the spell between the two sampling campaigns conducted at Ciavolo, the WDPT decreased by a not significant 14% in the duff layer and increased by a factor of 2.5 in the mineral subsoil (Table 3). The observed decrease of WDPT was probably a consequence of the well document decrease of SWR as the initial water content increases (i.e., de Jonge et al, 1999;Dekker and Ritsema, 1994;Fér et al, 2016;Lichner et al, 2013a). For the mineral layer, the hydrophobicity increased notwithstanding the soil water content did not change and the organic matter content decreased ( Table 2) thus suggesting that amphiphilic hydrophobic compounds were probably leached from the surface duff as consequence of rainfall that occurred in autumn (Vogelmann et al, 2013).…”

Section: Resultsmentioning

confidence: 90%

“…It is generally found to be most extreme when soils are dry, declining and eventually disappearing as soils become wet (e.g., de Jonge et al, 1999;Dekker and Ritsema, 1994;Fér et al, 2016;Lichner et al, 2013a;Vogelmann et al, 2013) although the soil moisture water repellency relationship is nevertheless complex (Doerr et al, 2000). When wet, amphiphilic compounds produced by plants are hydrophilic, but below a critical moisture threshold, their hydrophilic ends are bond strongly with one another and the soil particles, while hydrophobic ends are oriented towards the free space inducing water repellency (Ma'shum and Farmer, 1985;Tschapek, 1984).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 90%

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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“…Differentiated investigations about the dependence of water repellency from water content yielded, however, conflicting evidence for different soils: For example, Witter et al (1991) and Dekker and Ritsema (1994), amongst others, found very high intensities of water repellency for air-dry soil samples, whereas other authors report that the most pronounced water repellency was coinciding for water contents near wilting point (e.g. King 1981;De Jonge et al 1999).…”

mentioning

confidence: 99%

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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“…De Jonge et al (1999) found that some soils are not water repellent at the very low water contents, but become water repellent as soil water content increases. After the single peak, water repellency decreases until the soils become wettable above certain water content.…”

mentioning

confidence: 99%

“…As soil water increases, water repellency falls, but increases again to a second maximum. After the second peak, water repellency decreases and the soils finally become wettable above a certain water content (De Jonge et al 1999).…”

mentioning

confidence: 99%

Effects of kaolinite and drying temperature on the persistence of soil water repellency induced by humic acids

Lichner¹,

Babejova²,

Dekker³

2002

PLANT SOIL ENVIRON

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The effects of kaolinite additions and drying temperature on the persistence of soil water repellency, induced by humic acids from peat, were assessed in this study. It was found that additions of 5 and 10% kaolinite (referred to as the most effective material in combating the water repellency) did not result unambiguously in a decrease of the persistence of water repellency. In case of the higher humic acids contents, an increase of the persistence of water repellency was even noticed in comparison with the samples without kaolinite. Establishment (re-establishment) of water repellency was observed for the samples wetted to 30% after drying at temperatures of 30, 60°C (in both cases 36 of the 48 samples containing humic acids became water repellent) and after drying at 210°C (a few samples with the higher humic acids contents became slightly water repellent).

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Soil Water Repellency: Effects of Water Content, Temperature, and Particle Size

Cited by 238 publications

References 0 publications

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

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

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

Effects of kaolinite and drying temperature on the persistence of soil water repellency induced by humic acids

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