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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 6 | Copyright

Special issue: Mountain Waters: climatic and hydrological sensitivity

Hydrol. Earth Syst. Sci., 8, 1065-1075, 2004
https://doi.org/10.5194/hess-8-1065-2004
© Author(s) 2004. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  31 Dec 2004

31 Dec 2004

Water dynamics in a laurel montane cloud forest in the Garajonay National Park (Canary Islands, Spain)

G. García-Santos1, M. V. Marzol1, and G. Aschan2 G. García-Santos et al.
  • 1University of La Laguna, Department of Geography, Ctra. Tacoronte-Tejina 233, 1°, 38350 Tenerife, Canary Islands, Spain
  • 2University of Duisburg-Essen, Applied Botany - FB9, Essen, Germany
  • E-mail for corresponding author: glendagarciasantos@yahoo.es

Abstract. Field measurements from February 2003 to January 2004 in a humid (but dry in summer) crest heath wood-land (degraded laurel forest) in the National Park of Garajonay, Canary Islands (Spain), were combined to calculate water balance components. The water balance domain is at the surface of the catchment and is controlled by atmospheric processes and vegetation. This study found that annual water income (rainfall plus fog water) was 1440 mm year-1, half of which was occult (or fog) precipitation, while stand transpiration estimated from measurements of sap flow amounted, annually, to 40% of potential evapotranspiration calculated from measurements of meteorological variables. The positive role of crest laurel forests, which transpire less water than is incoming from rain and fog is emphasised.

Keywords: laurel forest, fog interception, stand transpiration, sap flow, hydrological cycle

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