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A clearwater river is classified based on its chemistry, sediments and water colour. Clearwater rivers have a low conductivity, relatively low levels of dissolved solids, typically have a neutral to slightly acidic pH and are very clear with a greenish colour. Clearwater rivers often have fast-flowing sections. The main clearwater rivers are South American and have their source in the Brazilian Plateau or the Guiana Shield. Outside South America the classification is not commonly used, but rivers with clearwater characteristics are found elsewhere.

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  • Klarwasserfluss (de)
  • Río de aguas claras (es)
  • Clearwater river (river type) (en)
  • 청수하천 (ko)
rdfs:comment
  • Klarwasserflüsse gehören neben Schwarzwasserflüssen und Weißwasserflüssen zu den drei in den Tropen dominierenden Flusstypen. Klarwasserflüsse entspringen im Bereich tertiärer Ablagerungen oder paläozoischer Gebirge und sind arm an mitgeführten Sedimenten und Elektrolyten. Die Leitfähigkeit des Wassers ist gering; Stickstoff und Phosphor sind in geringen Mengen vorhanden. Durch die guten Lichtverhältnisse und die ständige Verfügbarkeit von – zwar vergleichsweise wenigen, aber nicht lange inkorporierten – Nährstoffen ist die Primärproduktion sehr hoch. Die Flüsse sind arm an Mollusken. Der pH-Wert schwankt zwischen sauer und neutral, insgesamt zwischen 4,5 und 7,8, bei den größeren Flüssen zwischen 6,0 und 6,7. (de)
  • A clearwater river is classified based on its chemistry, sediments and water colour. Clearwater rivers have a low conductivity, relatively low levels of dissolved solids, typically have a neutral to slightly acidic pH and are very clear with a greenish colour. Clearwater rivers often have fast-flowing sections. The main clearwater rivers are South American and have their source in the Brazilian Plateau or the Guiana Shield. Outside South America the classification is not commonly used, but rivers with clearwater characteristics are found elsewhere. (en)
  • Los ríos de aguas claras pertenecen, junto a los ríos de aguas negras y los ríos de aguas blancas, a los tres tipos de ríos predominantes en las zonas del Trópico. Los ríos de aguas claras nacen en áreas de depósitos terciarios o en cordilleras del Paleozoico y son pobres en sedimentos y electrolitos. La conductividad del agua es baja; el nitrógeno y el fósforo están presentes en pequeñas cantidades. Debido a las buenas condiciones de iluminación y la disponibilidad constante de nutrientes la producción primaria es muy alta. Los ríos son pobres en moluscos. ​ El pH varía entre ácido y neutro, en total entre 4.5 y 7.8, y en los ríos más grandes entre 6.0 y 6.7. ​ (es)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/White-blotched_River_Stingray_Potamotrygon_leopoldi_2284px.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Rio_Xingu,_Vitória_do_Xingu_-_Pará.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Hypancistrus_zebra4305.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Amazonriverbasin_basemap.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Confluence_of_the_Madeira_River_and_Aripuanã_River.jpg
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