Monitoramento de plantas aquáticas por satélite

Abstract

ln order to control macrophytes "infestation", the first step is to find out its area of occupation. There are many remote sensing techniques available to help such estimation, each one presenting its advantages and limitation regarding to accuracy, periodicity, and availability. The sattelite images can offer, besides its synoptic overview, a periodicity compatable to any objective and any budget. ln this work, it was found that if the weed infestation were Pistia stratiotes, it will be possible to obtain a mask from the image, which will help to estimate the undesirable macrophytes area of occupation. It was also compared the spectral curves, obtained from satellite images, from both Eichhornia crassipes and Pistia stratiotes which was found to be quite different.