Remote Detection Of Potential Effects Of Intense Droughts On The Seasonality Of Water In The Fluvial-Lacustrine Complex Of Curuai, Amazon River, Parr, Brazil

In order to monitor the effects of the extreme drought of 2010 on the water seasonality of the Curuai lake system, the present work made use of a time series of Landsat-5 images, equivalent to the flow and drought periods of this year. With application of the NDWI (Normalized Difference Index of Water) and later vectorization of the contours of this water body, to determine the percentage reduction of the area of water sheet in the most significant months. The NDWI on the time series showed satisfactory results in the enhancement of the aquatic surface, allowing the zoning of these areas and a comparison of their reductive percentage, which showed potentially harmful effects, from 1,524 km(2) to 338,851 km(2), based on the survey of problems caused by the climatic extremes.