Brasil, el Río Negro con nivel de agua más bajo desde 1902

Brasil, el Río Negro con nivel de agua más bajo desde 1902. Río Negro, una de las principales vías fluviales de la región amazónica de Brasil, ha registrado su nivel de agua más bajo desde 1902.

Brasil Río Negro agua

En Brasil una de las principales vías fluviales de la región amazónica, el Río Negro, ha registrado su nivel de agua más bajo desde 1902, con decenas de barcos varados en el puerto de Manaos.

Según información oficial de la Autoridad Portuaria de Manaos, el río de aguas negras más grande del mundo alcanzó 13,59 metros, el nivel más bajo desde que comenzaron las mediciones en 1902, rompiendo el récord anterior de 13,63 metros establecido en 2010, informa la agencia de noticias Xinhua.

«Es la peor sequía en Manaos», afirmó un portavoz del puerto de la capital del estado de Amazonas.

Cientos de embarcaciones quedaron varadas en los bancos de arena del río mientras una sequía ha puesto a más de 50 municipios de la región amazónica brasileña en condiciones de emergencia, informaron medios locales.

Octubre es uno de los períodos en los que las aguas retroceden en la cuenca del río Amazonas, por lo que el gobierno ha lanzado una operación de dragado de los cursos de agua para permitir la navegación y evitar la escasez de agua en las ciudades ribereñas.

«El Río Negro bajará un poco más. Según datos históricos, las grandes sequías duran hasta finales de octubre y principios de noviembre», afirmó Renato Senna, climatólogo e investigador del Instituto Nacional de Investigaciones Espaciales del país.

Aguas negras

Las aguas de este río son similares en color al té fuerte, típico de los ríos de aguas negras. El color oscuro proviene del ácido húmico debido a una descomposición incompleta de la vegetación que contiene fenol de los claros arenosos. El río recibió su nombre porque desde la distancia parece negro.

Se ha escrito mucho sobre la productividad del Río Negro y otros ríos de aguas negras. La antigua idea de que se trata de «ríos del hambre» está dando paso, con nuevas investigaciones, al reconocimiento de que el Río Negro, por ejemplo, sustenta una gran industria pesquera y tiene numerosas playas para tortugas.

Si los exploradores no encontraron muchos pueblos indígenas a lo largo del Río Negro durante el siglo XVII, es probable que sus poblaciones se redujeran debido a nuevas enfermedades infecciosas y guerras más que a la baja productividad del río.

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