Telemetric monitoring system for meteorological and limnological data acquisition

Abstract

The rupture of a natural processes system resulting from river dam building needs to be assessed quantitatively and qualitatively. This assessment is essential for mathematically modelling the interactions among system variables to develop forecasting tools. The comparative study of modified and preserved systems is one of the most promising approaches in environmental research. This approach allows the evaluation of both the size and intensity of natural system variable reactions to human impact and their accommodation time lags so as to identify stability critical limits at different spatial and temporal scales (TUNDISI, 1999). Moreover, the research involves the evaluation of natural and antropic systems. The pulses are defined as any type of fast alteration suffered by the system variables. They can be natural or induced for antropic activity, frequent, seasonal or intermittent, with variable magnitude and both direct and indirect effect (TUNDISI 1999). Studies performed in different parts of the world and Brazil have stressed the effect of greenhouse gas emissions by hydroelectric reservoirs surfaces (LIMA et al. 2000, DUCHEMIN et al. 1995, RUDD et al. 1993).