Influence of extreme hydrological events in the quality of water reservoirs in the semi-arid tropical region

Influência de eventos hidrológicos extremos na qualidade da água de reservatórios na região tropical semiárida

ABSTRACT

Inland water environments, such as natural and artificial lakes, are increasingly vulnerable to extreme events (heavy rains, severe drought). This study aims to evaluate if this events affect the water quality of tropical semi-arid springs. The results showed that the reservoirs presented significant changes in the limnological variables between the rainy season and severe drought periods. However, different behaviors were observed among reservoirs in the period of severe drought, which indicate that the responses of these environments to extreme events should take into account other factors such as the climate of the region, the size and depth of the reservoir.

Keywords:
Severe drought; Limnological variables; Hydrological regime; Drylands