Relation between the location of check dams and adjacent vegetation cover in ephemeral gullies (Southeast Spain)
Fecha
2007Versión
Acceso abierto / Sarbide irekia
Tipo
Contribución a congreso / Biltzarrerako ekarpena
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
nodoi-noplumx
|
Resumen
In general, the work carried out on vegetation in the
Mediterranean catchments is focused more on the hillside
vegetation cover than the riparian. Apart from occasional
contributions by Alcaraz et al. (1997), Salinas et al. (2000),
Mant (2002), Corbacho et al., (2003), Hooke et al. (2005),
little more has been published about the vegetation of
ephemeral channels in the Southeast of Spain. Specifi ...
[++]
In general, the work carried out on vegetation in the
Mediterranean catchments is focused more on the hillside
vegetation cover than the riparian. Apart from occasional
contributions by Alcaraz et al. (1997), Salinas et al. (2000),
Mant (2002), Corbacho et al., (2003), Hooke et al. (2005),
little more has been published about the vegetation of
ephemeral channels in the Southeast of Spain. Specifically,
the gullies create a very dynamic fluvial environment of
which its connection with the morphological and hydraulic
effects of riparian vegetation has been little studied up until
now. The channel stability within these torrential streams
depends a great deal on how much it is subject to erosion, as
well as the production of sediments from the areas directly
related to them (upper channel reaches and adjacent
hillslopes). This is of unquestionable interest in channels
being corrected by check dams, especially to assess the
adequacy of their location (Conesa-García et al., 2007). The
current paper adds a straightforward methodology in such a
way, which relates the location of check dams to the level of
vegetation cover developing in the plots of land surrounding
the thalweg.
For the purpose of study, two semiarid gullied
catchments have been chosen, which have a strong tendency
to dry up: the Torrecilla and Cárcavo catchments (Southeast
Spain). The catchment of Torrecilla (15.5 km2) shows a
“gullied” landscape developed on metamorphic materials
(slates, phyllites, schists and quartzites), while the Cárvaco
catchment (34.8 km2) is drained by ephemeral channels and
gullies that deeply dissect the Miocene marls and
Quaternary pediments. The projects of hydrological
rectification undertaken are similar in both catchments: 33
and 40 check dam series were respectively built during the
1970´s, most of them with gabions. [--]
Materias
Checkdams,
Ephemeral gullies
Editor
Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
Publicado en
Javier Casalí, Rafael Giménez (eds.): Progress in Gully Erosion Research. IV International Symposium on Gully Erosion. September 17-19, 2007. Pamplona, Spain. Pamplona: Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007
Notas
Resumen del trabajo presentado al IV International Symposium on Gully Erosion, celebrado en la Universidad Pública de Navarra del 17 al 19 de septiembre de 2007.
Entidades Financiadoras
Part of the work reported in this paper was financially
supported by the Fundación Instituto Euromediterráneo de Hidrotecnia,
European Council, and Comunidad Autónoma de la Región de Murcia, Spain.