| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Alterra, Land Use and Soil Processes Team, P.O. Box 47, 6700 AA Wageningen, The Netherlands
b Dep. of Geography, Univ. of Wales Swansea, Singleton Park, Swansea SA2 8PP, UK
c Dep. of Civil Engineering, Demokritus Univ. of Thrace, 67100 Xanthi, Greece
* Corresponding author (L.W.Dekker{at}Alterra.wag-ur.nl)
Assessments of water repellency of soils are commonly made on air-dried or oven-dried samples, without considering the soil water content. The objectives of this study were to examine the spatial and temporal variability of soil water content, actual water repellency over short distances, and the variations in critical soil water contents. Between 22 Apr. and 23 Nov. 1999, numerous samples were collected from a grass-covered dune sand (typic Psammaquent), at six depths, eight times in transects and two times in soil blocks. The water drop penetration time (WDPT) test was used to measure the actual water repellency of the field-moist samples and the potential water repellency after drying the samples at 25, 65, and 105°C. Highly spatial and temporal variability in water content and persistence of actual water repellency was found between the samples from all soil depths. At each depth we established an upper water content, below which samples were water repellent and a lower water content, above which samples were wettable. This water content range, called the transition zone, was different for each depth, and, for example, assessed at 0- to 2.5-cm depth between soil water contents of 18 and 23% (vol./vol.), and at 16.5- to 19-cm depth between 2 and 5% (vol./vol.). The potential water repellency of samples dried at 25 and 65°C was on some days less severe than the actual repellency of field-moist samples on other days, thus underestimating the maximal persistence of water repellency that can occur in the field. Drying of the samples at 105°C significantly increased the potential water repellency.
Abbreviations: WDPT, water drop penetration time
This article has been cited by other articles:
|
|
 |
|
  R. V. Sweetwood, R. E. Terry, T. Beach, B. H. Dahlin, and D. Hixson The Maya Footprint: Soil Resources of Chunchucmil, Yucatan, Mexico Soil Sci. Soc. Am. J., May 13, 2009; 73(4): 1209 - 1220. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Larsbo, T. S. Aamlid, L. Persson, and N. Jarvis Fungicide Leaching from Golf Greens: Effects of Root Zone Composition and Surfactant Use J. Environ. Qual., June 23, 2008; 37(4): 1527 - 1535. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Deurer and J. Bachmann Modeling Water Movement in Heterogeneous Water-Repellent Soil: 2. A Conceptual Numerical Simulation Vadose Zone J., August 1, 2007; 6(3): 446 - 457. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Klitzke and F. Lang Hydrophobicity of Soil Colloids and Heavy Metal Mobilization: Effects of Drying J. Environ. Qual., June 27, 2007; 36(4): 1187 - 1193. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Arye, I. Nadav, and Y. Chen Short-term Reestablishment of Soil Water Repellency after Wetting: Effect on Capillary Pressure-Saturation Relationship Soil Sci. Soc. Am. J., April 5, 2007; 71(3): 692 - 702. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. M. Regalado and A. Ritter Geostatistical Tools for Characterizing the Spatial Variability of Soil Water Repellency Parameters in a Laurel Forest Watershed Soil Sci. Soc. Am. J., May 23, 2006; 70(4): 1071 - 1081. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
U. Buczko and O. Bens Assessing Soil Hydrophobicity and Its Variability through the Soil Profile Using Two Different Methods Soil Sci. Soc. Am. J., March 29, 2006; 70(3): 718 - 727. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Taumer, H. Stoffregen, and G. Wessolek Seasonal Dynamics of Preferential Flow in a Water Repellent Soil Vadose Zone J., March 8, 2006; 5(1): 405 - 411. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. H. MacDonald and E. L. Huffman Post-fire Soil Water Repellency: Persistence and Soil Moisture Thresholds Soil Sci. Soc. Am. J., September 1, 2004; 68(5): 1729 - 1734. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M.-O. Goebel, J. Bachmann, S. K. Woche, W. R. Fischer, and R. Horton Water Potential and Aggregate Size Effects on Contact Angle and Surface Energy Soil Sci. Soc. Am. J., March 1, 2004; 68(2): 383 - 393. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
