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
- 1 June 1996
- journal article
- Published by Elsevier BV in CATENA
- Vol. 27 (1), 25-47
- https://doi.org/10.1016/0341-8162(96)00007-0
Abstract
A laboratory programme of water drop penetration tests is used to investigate the nature of hydrophobicity of soils in burnt and unburnt Eucalyptus globulus and Pinus pinaster forest areas of northern Portugal. Variations in hydrophobicity of air-dried soil with soil depth, soil particle size fraction, land use and burn history are assessed. Results differ from those found by many other studies in several respects: (1) fire was not found to enhance hydrophobicity, as unburnt and old-burn soils are as hydrophobic as newly-burnt ones; (2) hydrophobicity was found to be characteristic of soils from the surface down to the weathered (Cw) horizon rather than confined to a near-surface layer, (3) it is also associated with the finer rather than the coarser size fractions of the soils. Soils under E. globulus are distinctly more hydrophobic than those under P. pinaster. Implications for the generation of overland flow are briefly explored.This publication has 18 references indexed in Scilit:
- Cambisols and related soils in north-central Portugal: their genesis and classificationGeoderma, 1995
- Soil hydrophobicity effects on rainsplash: Simulated rainfall and photographic evidenceEarth Surface Processes and Landforms, 1993
- Wildfire Impacts on Soil-Erosion and Hydrology in Wet Mediterranean Forest, PortugalInternational Journal of Wildland Fire, 1993
- The effects of fire and water repellency on infiltration and runoff under Mediterranean type forestCATENA, 1992
- CHARACTERIZATION OF THE WETTING PROPERTIES OF AIR-DRIED PEATS AND COMPOSTSSoil Science, 1991
- The effects of wildfire on soil wettability and hydrological behaviour of an afforested catchmentJournal of Hydrology, 1990
- Variability of water repellence in the dunes along the Dutch coastCATENA, 1989
- Identification, characterization, and hydrological implications of water repellency in mountain soils, southern British ColumbiaCATENA, 1989
- On using the effective contact angle and the water drop penetration time for classification of water repellency in dune soilsEarth Surface Processes and Landforms, 1988
- The composition of Eucalyptus and some other leaf waxesAustralian Journal of Chemistry, 1964