SYNERGISTIC INTERACTION AMONG RESERVOIRS ALONG A CASCADE SYSTEM: a sequential approach for modelling interconnected aquatic ecosystems

Código

XXIV-SBRH0341

Autores

MARIA DO CARMO CALIJURI, Laura Melo Vieira Soares, Talita Fernanda das Graças Silva

Tema

SE04.C - Engenharia Limnológica e Mecânica dos Fluidos Ambiental

Resumo

Cascading systems of interconnected reservoirs have been constructed along large rivers worldwide, establishing a network of aquatic environments. To better understand the water quality along a cascade system, the General Lake Model coupled to the Aquatic EcoDynamics (GLM-AED) was applied to simulate biogeochemical processes in six reservoirs situated along the Tietê River (Brazil). The model was calibrated and validated against measured field data. The present study implements a novel approach that fully links reservoir processes along the cascade system, taking into account the feedback from one water body to the next. Different scenarios were simulated to explore whether the water quality and trophic state in connected aquatic ecosystems can be affected by a common restoration measure of reducing external nutrient loads. Modelling results demonstrated a synergistic interaction among reservoirs, revealing that management strategies could be amplified according to the location of the direct input load reduction.