The objective of this study was to analyze the pattern spatial-temporal values of the Normalized Difference Vegetation Index (NDVI) in Itapeva-RS lake, using Landsat TM5 and ETM + 7 images, from 1985 through 2010. For the analysis of space-temporal behavior classes was used Normalized Difference Vegetation Index (NDVI) classes and Temporal Series Analysis (TSA). To validate the observed patterns were collected water samples from six points in the Itapeva Lake for clorofila_a, Total suspended solids and Secchi disk transparency. These results were correlated with NDVI values. The NDVI classes maps generated after analysis of TSA, showed dynamic patterns of seasonal and spatial associated with environmental variables that were actuating, allowing the establishment of three distinctive surfaces in Itapeva Lake: north, center and south. The Temporal Series Analysis of images shows that the increase and decrease of NDVI values are associated with periods of phytoplankton bloom. One concluded that the Temporal Series Analysis of Landsat images was satisfactory with regard to the behavior of spatial and temporal variation of NDVI classes.
NDVI; Time Series Analysis; Itapeva Lake
