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Improvement of a Major Naturally-Occurring Amazonian Lowland Wetlands Classification by means of the Classical Knowledge of River Water Hydrochemistry: Major Cations
[ E. A Ríos-Villamizar ] - * Instituto Nacional de Pesquisas da Amazônia (INPA), Av. André Araújo, 2936, Aleixo. CEP 69060-001. Caixa Postal 478, Manaus, Brazil.
[ M. T. F Piedade ] - * Instituto Nacional de Pesquisas da Amazônia (INPA), Av. André Araújo, 2936, Aleixo. CEP 69060-001. Caixa Postal 478, Manaus, Brazil.
[ F Wittmann ] - Max Planck Institute for Chemistry, Biogeochemistry Department, Mainz, Germany
[ T. M Carvalho ] - Instituto Nacional de Pesquisas da Amazônia (INPA), Av. André Araújo, 2936, Aleixo. CEP 69060-001. Caixa Postal 478, Manaus, Brazil
Water and soil chemistry provide important parameters for biogeochemical cycles and determine management options in wetlands. The first scientific classification of Amazonian water bodies was elaborated in the 1950s by Sioli. He used water color, as well as physical and chemical parameters, to explain limnological characteristics of the large Amazonian rivers and to relate these characteristics to the geological and geomorphological properties of their catchments. Today, an increasing amount of hydrochemical data indicate that the chemical composition of Amazonian water bodies varies much more than assumed by Sioli. Nevertheless, his simplified classification is useful for describing the natural hydrochemical variability of Amazonian rivers and wetlands. The distribution of alkali and alkaline-earth metals allows to distinguish well among the three classical water types and to categorize other water bodies. Refined results, including additional water chemistry variables and data from other rivers and streams throughout the Amazon basin, are being developed in order to subsidize the wetlands classification system
Amazon basin, Water quality, Water types, Major Cations