Patricia Kandus

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The use of NOAA-AVHRR NDVI time series from July 1981 to December 2000 was evaluated for the assessment of the functioning of a wetland macrosystem, the Paraná River Delta. The spatial resolution of the dataset was 8 by 8 km. Spatial and temporal variations in NDVI pattern were analyzed and evidences for El Niño/South Oscillation events identified. We(More)
This paper discusses the contribution of multipolarization radar data in monitoring flooding events in wetland areas of the Delta of the Paraná River, in Argentina. The discussion is based on the comparison between radiative transfer model simulations and ENVISAT Advanced Synthetic Aperture Radar observations of two types of marshes: junco and cortadera.(More)
The Lower Delta Islands of the Paraná River in Argentina constitute a major coastal tidal freshwater wetland located at the De La Plata River estuary, very close to Buenos Aires City. It is a complex region where the landscape pattern is characterized by mosaics of natural and man made ecosystems. Since the last few years an increased number of SAR images(More)
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(More)
The delta of the Paraná River in Argentina forms islands as it progrades into the Rio de la Plata estuary. In order to understand plant succession patterns, we analyzed cover-abundance and soil data along transects across topographic gradients of three islands. Using multivariate classification (TWINSPAN) and ordination (DCA and CCA), we developed a(More)
Wetlands are areas where the frequent and prolonged presence of water at or near the soil surface drives the natural system. Next to Buenos Aires, the Lower Delta islands of the Paraná River constitute a fresh water wetland characterized by a complex mosaic of natural and man made ecosystems and a hydrologic regime defined by the Paraná and De la Plata(More)
Freshwater marshes are the only significant natural ecosystems remaining in the Buenos Aires province section of the Lower Delta of the Parana River (Argentina), occupying 80% of the total island area. The Lower Delta hydrology is dominated mainly by the Parana river and the De La Plata estuary; different temporal superpositions of floods and landscape(More)
The inclusion of functional approaches on wetland characterizations and on biodiversity assessments improves our understanding of ecosystem functioning. In the Lower Paraná River floodplain, we assessed the ability of C-band polarimetric SAR data of contrasting incidence angles to discriminate wetland areas dominated by different plant functional types(More)
Aerial photographs from 1978, 1990, and 1995 were used to measure historical land-cover changes in the accretion portion of the Lower Delta of the Paraná River in Argentina. Six land-cover types were identified and mapped according to the dominant physiognomy: rushes, marshes, seibo forest, mixed prairies of woody and herbaceous plants, vegetated lagoons,(More)