IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Advances in radar remote sensing of wetland ecosystems: Combination of satellite observations, field data and em Models
Autor/es:
HAYDEE KARSZENBAUM; PAOLO FERRAZZOLI; FRANCISCO MATIAS GRINGS; MERCEDES SALVIA; PATRICIA KANDUS; PABLO PERNA
Revista:
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Referencias:
Año: 2007
ISSN:
0301-4797
Resumen:
This paper focuses
on the use of radar remote sensing for water storage estimation in wetland
marshes of the Paraná River Delta in Argentina. The approach
followed is based on the analysis of a temporal set of ENVISAT ASAR data which
includes images acquired under different polarizations and incidence angles as
well as different environmental conditions (water level, precipitation, and
vegetation condition). Two marsh species, named junco and cortadera, were
monitored. This overall data set gave us the possibility of studying and
understanding the basic interactions between the radar, the soil under
different flood conditions, and the vegetation structure. The comprehension of
the observed features was addressed through electromagnetic models developed
for these ecosystems. The procedure used in this work to estimate water level
within marshes combines a direct electromagnetic model, field work data
specifically obtained to feed the model, the actual ASAR measurements and a
well known retrieval scheme based on a cost function. Results are validated
with water level evaluations at specific points. A map showing an estimation of the water
storage capacity and its error in junco
and cortadera areas for the date
where the investigation was done is also presented.