Publication: Relaciones agua-suelo-vegetación.-Hidrología de un ambiente Mediterráneo de montaña. Las cuencas de Vallcebre (Pirineo Oriental) II. Relaciones precipitación-escorrentía y procesos hidrológicos
Authors
Latron, J. ; Soler, M. ; Nord, G. ; Llorens, P. ; Gallart, F.
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Universidad de Murcia
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DOI
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info:eu-repo/semantics/other
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Abstract
ABSTRACT
Hydrological response and runoff processes have been studied in the Vallcebre research
basins (North Eastern Spain) for almost 20 years. Results obtained allowed to build a more
complete perceptual model of the hydrological functioning of Mediterranean mountains
basins. On a seasonal and monthly scale, there was no simple relationship between rainfall
and runoff depths. Monthly rainfall and runoff values revealed the existence of a threshold in
the relationship between rainfall and runoff depths. At the event scale, the storm-flow
coefficient had a clear seasonal pattern. The effect of the water table position on how rainfall
and runoff volumes relate was observed. Examination of soil water potential and water table
dynamics during representative floods helped to identify 3 types of characteristic hydrological
behaviour during the year. Under dry conditions, runoff was generated essentially as
infiltration excess runoff in low permeable areas, whereas saturation excess runoff
dominated during wetting-up and wet conditions. During wetting-up transition, saturated
areas resulted from the development of scattered perched water tables, whereas in wet
conditions they were linked to the rise of the shallow water table.
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