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Universiteit van Amsterdam (2010)

Assessing land degradation in the semi-arid Guadalentín basin using hyperspectral imagery Soil organic carbon content as an indicator of land degradation

Moerland M.P.

Titre : Assessing land degradation in the semi-arid Guadalentín basin using hyperspectral imagery Soil organic carbon content as an indicator of land degradation

Auteur : Moerland M.P.

Université de soutenance : Universiteit van Amsterdam Institute for Biodiversity and Ecosystem Dynamics (IBED)

Grade : Master programme : Earth Surface Processes 2010

Présentation
Agricultural
 production
 as
 well
 as
 semi‐natural
 environment
 in
 the
 semi‐arid
Guadalentin
basin
are
threatened
by
land
degradation.
The
main
process
which
causes
degradation
in
this
area,
is
water
erosion.
In
this
research
an
assessment
is
made
on
land
degradation
in
the
semi‐natural
environment
in
the
Quadalentin
basin.
 The
 different
 stages
 of
 degradation
 are
 mapped
 during
 fieldwork.
 Also,
laboratorial
analyses
have
been
carried
 out
 to
 research
 the
soil
 organic
carbon (SOC)
 content
 of
 225
 soil
 samples,
 taken
 during
 the
 fieldwork.
A
high
 negative correlation
was
 found
between
SOC
and
 the
land
degradation
classes.
Also,
 the average
 reflection
 values
 of
 the
 hyperspectral
 pixels,
 which
 represent
 the degradation
classes,
were
researched.
Hereby,
two
sorts
of
hyperspectral
images were
used ;
HYMAP
and
DAIS
images.
Again,
a
high
negative
correlation
between SOC
 and
 the
 pixel
 reflection
 values
 was
 found.
 It
 was
 concluded
 that
 the hyperspectral
images
can
well
be
used
to
map
the
spatial
distribution
of
the
land degradation
 classes,
 using
 SOC
 as
 an
 indicator.
 The
 spectral
 information regarding
 organic
 carbon
 differs
 between
 the
 HYMAP
 and
 DAIS
 images.
 Both images
thus
need
a
different
approach
with
the
classification.

Document source

Présentation

Page publiée le 1er novembre 2016, mise à jour le 17 octobre 2018