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Open Access item Análisis de la variabilidad temporal de la infiltración en un gradiente de degradación de usos del suelo en el Pirineo central

Authors:Regüés-Muñoz, D.
Serrano Muela, M. P.
Nadal-Romero, E.
Lana-Renault, N.
Keywords:Infiltración, Usos del suelo, Cubierta vegetal, Condiciones físicas, Inflitration, Land use, Plant covers, Physical conditions
Issue Date:2012
Publisher:Sociedad Española de Geomorfología
Citation:Cuaternario y Geomorfología 26 (1-2): 9-28 (2012)
Abstract:[ES] Se analiza
 la 
capacidad
 de
 infiltración
 con
 respecto
 a
 las
 condiciones
 físicas
 superficiales
(humedad
 y
 resistencia
 mecánica)
de
 suelos
 en
 el 
Pirineo 
Central,
considerando tres
 escenarios:
bosque
 natural,
campos abandonados
 y
 cárcavas.
El
 estudio
 se
 ha
 realizado
 en
 tres
 cuencas
 experimentales
(San
 Salvador, 
Arnás
 y Araguás)
situadas 
en 
un 
contexto 
geográfico,
 geológico
 y 
climático
 similar.
La
 información
 se
 ha
 obtenido mediante 
ensayos
 con
 un
 infiltrómetro 
de
 doble
 anillo 
entre
 otoño
 de
 2008
 y
 verano
 de 
2009.
 Los 
resultados
 sugieren 
cierto
 efecto
 de
 las 
condiciones
 físicas
 previas 
sobre
 la capacidad 
de
 infiltración.
Sin 
embargo,
el
 uso
 del
 suelo
 y 
la orientación
 de
 las
 laderas
(N‐S) se 
han
 revelado
 los factores más
 determinantes. Esto
 se
 relaciona
 con
 la
 variabilidad
 estacional del 
estado 
físico
 antecedente
 y
 su
 dinámica
 durante
 los
 ensayos.
 Las 
diferencias 
de la
 infiltración
 asociada
 a
 la 
orientación
 de
 las
 laderas
 incluso
 pueden
 superar
 a
 las observadas 
entre
 usos
 del
 suelo.
[EN] The
 infiltration
 capacity
 has
 been
 analysed
 related 
to
 the
 variation 
of
 surface
 physical
 conditions
(moisture and 
mechanical
r esistance)
of 
soils
 from
 the
 Central
 Spanish
 Pyrenees,
taking 
into
 account
 the
 most
 representative
 situations
 of
 land
 uses
 and
 vegetal
 covers.
The
 study
 was
 carried 
out
 in
 three
 experimental catchments,
each
 representative
 of
 different
 environments
 in
 terms
 of
 soil
 use
 and
 vegetation
 cover: forested
(San
 Salvador),
field
 abandonment
 (Arnás)
and
 badlands
(Araguás).
The
 three
 catchment s
are 
located
 near by
 and 
have
 similar
 geologica l
and
 climatic
 conditions.
 The
 study
 was
 done
 through
 experimental infiltration
s et s
using
 a
 big
 double
ring
 instrument
(50
 cm 
water
 column
 height.
 Experiments 
were
 performed
 from
 autumn
 2008 
to
summer
 2009.
The
 infiltration
 process
 was
 analysed 
on 
six
 land
 uses 
situations:
bare regolith,
grass
c overed
 regolith,
north‐facing
 slope 
in
 forested 
soil,
south‐facing
 slope
in
 forested soil,
north‐facing
 slope
 in
 meadow
 soil 
and
south‐facing
 slope
 in 
pasture
 soil.
 Before and
after
 each
 experiment
 soil
 was
 sampled
 in
 order
 to 
estimate 
moisture 
content 
(0‐1,
0‐5
 and
 5‐10
 cm
 depth)
and 
surface mechanical
 resistance
 was
 measured
 with
 the
 help
 of
 a
 pocket 
penetrometer,
providing
 an 
idea
a bout 
previous 
conditions
 and 
its
 variation.
 The
 results
 suggest
 a
 certain
 effect 
of 
moisture 
conditions 
on
 infiltration capacity. 
However,
 soil
 use
 and 
slope
 exposition
(North 
and
 South)
seem
 to 
be
 the
 most
 determinant
 factors.
This 
is
 related
 to
 the
 seasonal 
variability
 of antecedent
 soil
 conditions
 and 
its 
dynamics
 during
 the
experiments.
 The
 differences 
on
 infiltration
 capacity
 associated
 with
 slope
e xposition
 can 
be
 higher 
than those
 observed
 between
 land
 uses.
Description:20 págs, 4 figs, 5 tablas
Publisher version (URL):http://tierra.rediris.es/CuaternarioyGeomorfologia/images/Vol26-1-2/CyG_26(1-2)_Regues.pdf
URI:http://hdl.handle.net/10261/58923
ISSN:0214-1744
Appears in Collections:(IPE) Artículos

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