Influence of the Amazon Hydrological Regime on Eutrophication Indicators of a Hydroelectric Power Plant Reservoir.
Dam constructions in the Amazon have increased exponentially in the last decades, causing several environmental impacts and serious anthropogenic impacts in certain hydroelectric power plant reservoirs in the region have been identified. The assessment of the trophic status of these reservoirs is of interest to indicate man-made changes in the environment, but must take into account the hydrological cycle of the area. This can be relevant for environmental management actions, aiding in the identification of the ecological status of water bodies. In this context, physico-chemical parameters and eutrophication indicators were determined in a hydroelectric power plant reservoir in the Brazilian Amazon to assess trophic variations during the regional hydrological regime phases on the reservoir, namely dry, filling, full and emptying stages. The local hydrological regimes were shown to significantly influence TSS and turbidity, as well as NH4, NO3, PO4, with higher values consistently observed during the filling stage of the reservoir. In addition, differences among the sampling stations regarding land use, population and anthropogenic activities were reflected in the PO43-values during the different hydrological phases.
Instituto de Ciências Exatas e naturais, Faculdade de Estatística e Faculdade de Ciência da Computação, Universidade Federal do Pará (UFPA), Rua Augusto Corrêa, 01, Belém, PA, CEP 66075-110, Brazil.
Jean Carlos A
JC
Freire
Centro de Estudos da Saúde do Trabalhador e Ecologia Humana (CESTEH), ENSP, FIOCRUZ, Rua Leopoldo Bulhões, 1480, Rio de Janeiro, RJ, 21041-210, Brazil. rachel.hauser.davis@gmail.com.
Rachel Ann
RA
Hauser-Davis
Instituto de Ciências Exatas e naturais, Faculdade de Estatística e Faculdade de Ciência da Computação, Universidade Federal do Pará (UFPA), Rua Augusto Corrêa, 01, Belém, PA, CEP 66075-110, Brazil.
Tarcísio
T
da Costa Lobato
Instituto de Ciências Exatas e naturais, Faculdade de Estatística e Faculdade de Ciência da Computação, Universidade Federal do Pará (UFPA), Rua Augusto Corrêa, 01, Belém, PA, CEP 66075-110, Brazil.
Jefferson M
JM
de Morais
Instituto de Ciências Exatas e naturais, Faculdade de Estatística e Faculdade de Ciência da Computação, Universidade Federal do Pará (UFPA), Rua Augusto Corrêa, 01, Belém, PA, CEP 66075-110, Brazil.
Terezinha F
TF
de Oliveira
Centro de Tecnologia da ELETRONORTE, Rodovia Arthur Bernardes, S/N-Miramar, Telégrafo sem Fio, Belém, PA, CEP 66115-000, Brazil.
Augusto Cesar
AC
F Saraiva
D064751:Ammonium Compounds / Q000032:analysis; D001938:Brazil; D004784:Environmental Monitoring / Q000379:methods; D005068:Eutrophication; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D011210:Power Plants; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis; D060753:Water Quality; D062066:Water Resources
D064751:Ammonium Compounds; D009566:Nitrates; D010710:Phosphates; D014874:Water Pollutants, Chemical
Amazon reservoir; Eutrophication parameters; Hydrological regime