Abstract

A coupled hydrodynamic-biogeochemical model was applied to simulate scenarios of classic restoration practices to address eutrophication in a cascade system comprised of six reservoirs along the Tietê River (Brazil) from 2008 to 2016. Each restoration scenario was propagated along the cascade system by using a sequential modelling approach. The simulated scenarios revealed which on-land and in-lake restoration techniques are capable of promoting water quality improvements that are propagated to all downstream reservoirs along the cascade system. The present findings may provide a useful management strategy to develop better restoration practices at a basin catchment scale for other lakes and reservoirs along cascade systems worldwide, especially in highly anthropogenic impacted areas, taking advantage of the propagation of water quality improvements in a downstream direction due to a domino effect triggered by the feedback from one water body to the next in a chain.

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