IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Detection of floating aquatic plants using high spatial resolution imagery in the Río de la Plata estuary
Autor/es:
DOGLIOTTI, A.I.; RUDDICK, K.; GOSSN, J.I; VANHELLEMONT, Q.
Reunión:
Conferencia; HIGHROC Science Conference; 2017
Resumen:
At thebeginning of 2016 a huge amount of aquatic plants invaded the highly turbid waters of Rio de la Plata (Argentina)causing significant disruption of human activities via clogging drinking waterintakes in the estuary, blocking ports and marinas and introducing dangerousanimals from faraway wetlands into the city. Even though drifting aquatic plantdetachments drift downstream the Paraná river everyyear in small amounts, large temporary invasions have been observed every 10years. The large temporary invasion of aquatic plants that took place from Januaryto April 2016 has been caused by the heavy rains, driven by a strong El Niño, thatincreased river levels in the La Platabasin. The event has been detected using different mid to high resolutionremote systems. In this work we show the capability of high-resolution multi-spectralimagery like Sentinel-2, Landsat-8, and MODIS-250m, for mapping and quantifyingthe large aquatic hyacinth invasion in the RdP that started in January 2016. Boththe large amount of particles as well as the increasing spatial resolutionposes challenges for its correct detection. An index that uses bands in the red(to take into account chlorophyll-a absorption), the near-infrared, andshort-wave infrared bands is proposed and validated using field measurements.