Soil Water Repellency Severity and its Spatio‐Temporal Variation in Burnt Eucalypt Plantations in North‐Central Portugal

2015 ◽  
Vol 27 (5) ◽  
pp. 1463-1478 ◽  
Author(s):  
Maruxa C. Malvar ◽  
Sergio A. Prats ◽  
João P. Nunes ◽  
Jan J. Keizer
Keyword(s):  
Temporal Variation ◽  
Soil Water ◽  
Water Repellency ◽  
Soil Water Repellency ◽  
North Central ◽  
Eucalypt Plantations ◽  
Central Portugal ◽  
Spatio Temporal

Hydrological implications of soil water-repellency in Eucalyptus globulus forests, north-central Portugal

2000 ◽  
Vol 231-232 ◽  
pp. 165-177 ◽  
Author(s):  
A.J.D. Ferreira ◽  
C.O.A. Coelho ◽  
R.P.D. Walsh ◽  
R.A. Shakesby ◽  
A. Ceballos ◽  
...  
Keyword(s):  
Soil Water ◽  
Eucalyptus Globulus ◽  
Water Repellency ◽  
Soil Water Repellency ◽  
North Central ◽  
Central Portugal

The role of tree stem proximity in the spatial variability of soil water repellency in a eucalypt plantation in coastal Portugal

Soil Research ◽  
2005 ◽  
Vol 43 (3) ◽  
pp. 251 ◽  
Author(s):  
J. J. Keizer ◽  
A. J. D. Ferreira ◽  
C. O. A. Coelho ◽  
S. H. Doerr ◽  
M. C. Malvar ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Repellency ◽  
Soil Water Repellency ◽  
Individual Measurement ◽  
Hydrophobic Compounds ◽  
Ethanol Droplet ◽  
Central Portugal ◽  
Living Organisms ◽  
Tree Stem

Certain organic compounds derived from living organisms or their decaying parts are generally accepted to induce soil water repellency. Water repellency may therefore be expected to increase with proximity to organisms releasing hydrophobic compounds. This hypothesis is tested here for Eucalyptus globulus trees, since eucalypt species are frequently associated with elevated repellency levels. In a young, first-rotation plantation on coastal dune sands in central Portugal, repeat measurements of water repellency using the ‘Molarity of an Ethanol Droplet’ (MED) test were carried out in situ between April 2001 and May 2002. On 25 dates, repellency was measured at initially 2 and later 3 distances on 2 sides of 8–11 randomly selected trees. On 15 occasions, additional repellency measurements were performed within small grids aside 3 of the selected trees. The postulated decrease in topsoil water repellency with increased distance from eucalypt tree stems was found to apply on several individual measurement dates, as well as, more unexpectedly since repellency usually is a transient phenomenon, for the study period as a whole. The results confirm the general association of eucalypt trees with water repellency, and indicate that tree stem proximity is an important but not sufficient factor to explain repellency distribution in topsoil.

Soil Water Repellency Dynamics in Pine and Eucalypt Plantations in Portugal – A High‐resolution Time Series

2013 ◽  
Vol 27 (5) ◽  
pp. 1334-1343 ◽  
Author(s):  
Juliana M. Santos ◽  
Frank G. A. Verheijen ◽  
Filipa Tavares Wahren ◽  
Andreas Wahren ◽  
Karl‐Heinz Feger ◽  
...  
Keyword(s):  
Time Series ◽  
High Resolution ◽  
Soil Water ◽  
Water Repellency ◽  
Resolution Time ◽  
Soil Water Repellency ◽  
Eucalypt Plantations

Temporal variation in topsoil water repellency in two recently burnt eucalypt stands in north-central Portugal

CATENA ◽  
2008 ◽  
Vol 74 (3) ◽  
pp. 192-204 ◽  
Author(s):  
J.J. Keizer ◽  
S.H. Doerr ◽  
M.C. Malvar ◽  
S.A. Prats ◽  
R.S.V. Ferreira ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Water Repellency ◽  
North Central ◽  
Central Portugal

scholarly journals Short-term spatio-temporal spring grassland fire effects on soil colour, organic matter and water repellency in Lithuania

2013 ◽  
Vol 5 (2) ◽  
pp. 2119-2154 ◽  
Author(s):  
P. Pereira ◽  
X. Úbeda ◽  
J. Mataix-Solera ◽  
D. Martin ◽  
M. Oliva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Water ◽  
Water Repellency ◽  
Fire Effects ◽  
Composite Sample ◽  
Soil Water Repellency ◽  
Short Term ◽  
Aggregate Fractions ◽  
Grassland Fire ◽  
Spatio Temporal

Abstract. The aim of this work was to study the short-term effects (first 9 months after the fire) of a low-severity spring boreal grassland fire on soil colour, soils organic matter (SOM) and soil water repellency (SWR) in Lithuania. Three days after the fire we designed a plot of 400 m2 in a control (unburned) and unburned area with the same geomorphological characteristics. Soil water repellency analysis were assessed through the 2 mm mesh (composite sample) and in the subsamples of all of the 250 samples divided into different soil aggregate fractions of 2–1, 1–0.5, 0.5–0.25 and < 0.25 mm, using the Water Drop Penetration Time (WDPT) method. The results showed that fire darkened the soil significantly during the entire study period due to the incorporation of ash/charcoal into the soil profile. Soil organic matter was significantly higher in the first two months after the fire in the burned plot, in comparison to the unburned plot. Soil water repellency (SWR) of the composite sample was higher in the burned plot during the first two months after the fire. However, considering the different aggregate fractions studied, the SWR was significantly higher until 5 months after the fire in the coarser fractions (2–1 mm, 1–0.5 mm) and 7 months after in the finer (0.5–0.25 mm and < 0.25 mm), suggesting that the leachability of organic compounds is different with respect to soil aggregate size fractions. This finding has implications for the spatio-temporal variability of fire effects on SWR. SOM was significantly negative correlated with SWR (composite sample) only in the two months after the fire. These results demonstrated that in the first two months the hydrophobic compounds produced by fire were one of the factors responsible for the increase in SWR. Subsequently repellent compounds were leached, at different rates, according to particle size. The impacts of this low severity grassland fire were limited in time, and are not considered a~threat to this ecosystem.

Do wildfire and slope aspect affect soil water repellency in eucalypt plantations? – A two-year high resolution temporal dataset

CATENA ◽  
2020 ◽  
Vol 189 ◽  
pp. 104471 ◽  
Author(s):  
Martinho A.S. Martins ◽  
Frank G.A. Verheijen ◽  
Maruxa C. Malvar ◽  
Dalila Serpa ◽  
Oscar González-Pelayo ◽  
...  
Keyword(s):  
High Resolution ◽  
Soil Water ◽  
Water Repellency ◽  
Slope Aspect ◽  
Soil Water Repellency ◽  
Eucalypt Plantations

Soil water repellency in sandy soil depends on the soil drying method, incubation temperature and specific surface area

Geoderma ◽  
2021 ◽  
Vol 402 ◽  
pp. 115264
Author(s):  
Enoch V.S. Wong ◽  
Philip R. Ward ◽  
Daniel V. Murphy ◽  
Matthias Leopold ◽  
Louise Barton
Keyword(s):  
Specific Surface ◽  
Soil Water ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sandy Soil ◽  
Incubation Temperature ◽  
Water Repellency ◽  
Soil Drying ◽  
Drying Method ◽  
Soil Water Repellency

The use of visible and near-infrared spectroscopy for the analysis of soil water repellency

2014 ◽  
Vol 65 (3) ◽  
pp. 360-368 ◽  
Author(s):  
I. Kim ◽  
R. R. Pullanagari ◽  
M. Deurer ◽  
R. Singh ◽  
K. Y. Huh ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Soil Water ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Water Repellency ◽  
Soil Water Repellency
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