IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Monitoring Soil Condition in La Plata basin Ecosystems using AMSR-E data
Autor/es:
GRINGS F.M., M. SALVIA, M. BARBER, H. KARSZENBAUM, P. FERRAZZOLI, F. MOCCIA, A. SOLDANO, D. GONIASKI, G. PARMUCHI , C. MONTENEGRO, P. KANDUS, M. BORRO,
Lugar:
Puerto Madryn
Reunión:
Workshop; 4th Aquarius / SAC-D Science Workshop; 2008
Institución organizadora:
CONAE
Resumen:
The La Plata Basin (LPB) is located in South America and covers about 3.6 million km2. It is the fifth largest basin in the world with extensive and important native forest, very productive agricultural areas, wetlands, important human settlements and infrastructure developments. The principal sub-basins are those of the Paraná, Paraguay and Uruguay Rivers A multitemporal analysis of AMSR-E signatures, covering a time interval between May 2006 and the end of 2007 was carried out. In particular, maps based on the normalized polarization index (PI) at C band and the normalized frequency index (FI) at C and Ka band were produced. The study was carried out over the whole basin, where three ecosystems were analyzed in more detail: Chaco Forest, the Submeridional Lowlands, and the Paraná river floodplain. Information about fundamental variables, such as forest biomass, water level of main rivers and precipitation distribution maps were available to us. Along the Paraná river, multitemporal PI images show wide regions characterized by higher PI values, related to flooding. The spatial and temporal extent of these effects is related to rain intensity and duration, velocity of flooding, channel and floodplain morphology. Within the Chaco forest, a strong rainstorm produced an appreciable increase of PI and FI also in developed forest areas. This result can be important, since the problem of forest opacity receives much attention at present time. Within the Submeridional Lowlands, the PI response was carefully analyzed together with precipitation information showing the sensitivity of this index to soil condition.( Por Invitación)