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Modelagem da Lagoa da Pampulha: uma ferramenta para avaliar o impacto da bacia hidrográfica na dinâmica do fitoplâncton

Abstract : In urban areas the increasing imperviousness is responsible for rising runoff volume and speed, leading to a greater capacity to load nutrients and pollutants into reservoirs. In order to study the impacts of catchment changes on the phytoplankton dynamics in urban lakes, a modelling approach in which a hydrological model is connected to an ecological lake model is proposed for Lake Pampulha (Brazil). In this paper we present the methodology used to link both models. Lake Pampulha and its catchment area were intensively monitored between October 2011 and June 2013 in order to provide data for the calibration and validation of both models. The results of the hydrologic model showed good agreement with the in situ measurements, and the Nash coefficient ranged from 0.70 to 0.88. The lake ecological model have successfully represented the cyanobacteria dynamics (normalized mean average error: 0.25–0.42, Pearson coefficient: 0.82–0.89, p<0.0001). Monitoring and modelling showed that cyanobacteria blooms are quite disturbed by water column mixing caused by rain events. The mathematical tool developed here can be used to assess different scenarios of climate changes or catchment area changes and can be very helpful for the management of urban water resources.
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Soumis le : lundi 25 septembre 2017 - 10:55:47
Dernière modification le : mardi 15 février 2022 - 13:38:04

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Talita Silva, Brigitte Vinçon-Leite, Alessandra Giani, Cleber Cunha Figueredo, Guido Petrucci, et al.. Modelagem da Lagoa da Pampulha: uma ferramenta para avaliar o impacto da bacia hidrográfica na dinâmica do fitoplâncton. Engenharia Sanitaria e Ambiental, Brazilian Association of Sanitary and Environmental Engineering, 2016, 21 (1), pp.95 - 108. ⟨10.1590/S1413-41520201600100125692⟩. ⟨hal-01592606⟩



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