CARACTERIZAÇÃO HIDROLÓGICA DOS SISTEMAS LACUSTRES DO ARQUIPÉLAGO DE ANAVILHANAS COM BASE EM SENSORIAMENTO REMOTO

Hydrological characterization of Anavilhanas Archipelago Lake Systems by remote sensing

Abstract

This study characterized the Anavilhanas Archipelago lake systems and evaluated the spatial variation of the water surface under conditions close to the interannual fluviometric averages for each period, using Landsat 08 images and Rio Negro fluviometric data. The seasonal variation observed for the entire archipelago was around 10%. For lake systems and “dead water” areas it was 17%. For 447 lakes identified, 46% are connected to the archipelago canals during the low water period and 54% are isolated during this period. Three domains were pointed to the Archipelago. In domain A (upstream) the river is relatively narrow and the islands and lakes are smaller. In domain B (center) the river is relatively wider and the islands and lakes are large. In domain C (downstream) the river is similar in width to domain A and the narrow, elongated and winding islands with elongated and open lakes. The C domain presented less seasonal variation and a larger number of connected lakes, which may be associated with the geomorphological characteristics and hydraulic conditions given by the influence of the Solimões River hydraulic bus.