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Pure and Applied Geophysics

, Volume 169, Issue 5–6, pp 873–880 | Cite as

The Effects of Desert Pavements (Gravel Mulch) on Soil Micro-Hydrology

  • K. F. Kaseke
  • A. J. Mills
  • J. Henschel
  • M. K. Seely
  • K. Esler
  • R. Brown
Article

Abstract

The effect of desert pavements (gravel mulch) on near surface soil micro-hydrology has been inadequately studied. Micro-hydrology in arid ecosystems occurs due to a daily non rainfall atmospheric water cycle, consisting of an input phase (dew, fog, vapour adsorption) and an evaporation phase. A winter comparative study between a bare soil (control) and gravel mulch using the automated microlysimeter approach was conducted in Stellenbosch, South Africa in 2008. Results showed that dew deposition and direct water vapour adsorption were significantly higher into bare soil compared to gravel mulch. In contrast, however, soil moisture from rain persists for a longer time under gravel mulch compared to bare soil. This result suggests that the greatest impact of gravel mulch on soil micro-hydrology is towards conserving moisture and could explain why the treatment is used in dry-land agriculture in Mediterranean regions.

Keywords

Gravel mulch non rainfall atmospheric water dew vapour adsorption evaporation 

Notes

Acknowledgments

This study was financially supported by the National Research Foundation of South Africa (NRF). The authors would also like to thank Dr. J. Irish and Prof. M. Fey for the input.

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Copyright information

© Springer Basel AG 2011

Authors and Affiliations

  • K. F. Kaseke
    • 1
    • 3
    • 6
  • A. J. Mills
    • 2
  • J. Henschel
    • 3
  • M. K. Seely
    • 4
  • K. Esler
    • 1
  • R. Brown
    • 5
  1. 1.Department of Conservation EcologyStellenbosch UniversityMatielandSouth Africa
  2. 2.Department of Soil ScienceStellenbosch UniversityMatielandSouth Africa
  3. 3.Gobabeb Research CentreWalvis BayNamibia
  4. 4.Desert Research Foundation of NamibiaWindhoekNamibia
  5. 5.Climate Systems Analysis GroupUniversity of Cape TownRondeboschSouth Africa
  6. 6.ChitungwizaZimbabwe

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