New insights on the classification of major Amazonian river water types
Autor: | J. Marion Adeney, Eduardo Antonio Ríos-Villamizar, Maria Teresa Fernandez Piedade, Wolfgang J. Junk |
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Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
Hydrology Blackwater 010504 meteorology & atmospheric sciences Renewable Energy Sustainability and the Environment Amazonian Limnology Aquatic ecosystem Climate change Structural basin 010603 evolutionary biology 01 natural sciences Sustainable management Catchment area 0105 earth and related environmental sciences Water Science and Technology |
Zdroj: | Sustainable Water Resources Management. 6 |
ISSN: | 2363-5045 2363-5037 |
DOI: | 10.1007/s40899-020-00440-5 |
Popis: | Traditional water classifications for Amazonian rivers are based mainly on optical characteristics that do not fully capture their complexity. Today, an increasing amount of hydrochemical data indicates that the chemical composition of Amazonian rivers varies much more than this simple classification indicates. Revising river classification based on hydrochemical properties is proposed here. In this first comprehensive review of Amazonian river chemistry, we synthesized critical information from 168 scientific publications and distinguish unusual white, black, and clearwater rivers. It is shown the distribution of such rivers across the basin and the limitations of using generalized designations for river typologies. For example, some optically clearwater rivers draining carboniferous stripes have chemical properties similar to whitewater rivers, regardless of their high transparency. Furthermore, a clear or blackwater stream that becomes turbid because of soil erosion does not become a whitewater stream. Its hydrochemical parameters of acidity and nutrient poverty depend on the geology of the catchment area and remain relatively unaffected. These insights into Amazonian river classification provide a new understanding of their baseline limnological conditions. They have implications for sustainable management of freshwater systems and for monitoring potential impacts of large development projects and climate change on the Amazonian aquatic systems. |
Databáze: | OpenAIRE |
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