Río Aguaytía

from Wikipedia, the free encyclopedia
Río Aguaytía
Río Aguaytía near the city of Aguaytía

Río Aguaytía near the city of Aguaytía

Data
location PeruPeru Peru
River system Amazon
Drain over Río Ucayali  → Amazon  → Atlantic Ocean
Headwaters Cordillera Azul
9 ° 19 ′ 57 ″  S , 75 ° 40 ′ 1 ″  W.
Source height approx.  1700  m
muzzle Río Ucayali coordinates: 8 ° 4 ′ 16 ″  S , 74 ° 40 ′ 19 ″  W 8 ° 4 ′ 16 ″  S , 74 ° 40 ′ 19 ″  W.
Mouth height approx.  137  m
Height difference approx. 1563 m
Bottom slope approx. 4 ‰
length approx. 393 km
Catchment area approx. 12,000 km²
Drain MQ
 880 m³ / s
Left tributaries Río Yuracyacu , Río Shambo , Río Gradayacu, Río Juantia
Right tributaries Quebrada Huipoca, Río San Alejandro , Río Neshuya
Small towns Aguaytía , Curimaná , Nueva Requena
Communities Mariscal Cáceres, Santa Rosa

The Río Aguaytía is an approximately 393 km long left tributary of the Río Ucayali in eastern Peru . It flows through the provinces of Padre Abad and Coronel Portillo in the Ucayali region .

River course

The Río Aguaytía rises on the eastern flank of the Cordillera Azul , a mountain range of the Peruvian Eastern Cordillera , at an altitude of about 1700  m . It initially flows 20 km in an easterly direction. It then flows through the western edge of the Amazon basin , 80 km in a northerly direction, later in a north-northeastern direction and finally in a northeastern direction. On the lower two thirds of the flow path of the Río Aguaytía forms numerous meanders and oxbow lakes from. In some parts it also forms side arms.

At river kilometer 334, the Río Yuracyacu comes from the west and meets the Río Aguaytía , which flows north. At river kilometer 327, the city of Aguaytía is on the left bank of the river. The national road 5N to Pucallpa crosses the river here. At river kilometer 289 the Río Shambo flows from the west into the Río Aguaytía. The aboriginal community of Santa Rosa is located at river kilometer 280 on the right bank of the right arm of the Quebrada Raya river. At river kilometer 244 the Río Gradayacu (in the upper reaches: Río Santa Ana) meets the Río Aguaytía from the left. At river kilometer 170 the Río San Alejandro flows , at river km 122 the Río Neshuya into the Río Aguaytía, both from the right. At river kilometer 160 the small town Curimaná lies on the right bank of the river. The last 120 kilometers the river runs within the province of Coronel Portillo. The small town of Nueva Requena is located 80 km above the mouth on the right bank of the river. At river kilometer 60 the Río Juantia meets the Río Aguaytía from the left. This finally flows into the north-flowing Río Ucayali at an altitude of about 137  m 38 km north-northwest of Pucallpa.

Catchment area and hydrology

The Río Aguaytía drains an area of ​​around 12,000 km². The catchment area stretches from the Cordillera Azul in the west to the Río Ucayali in the east. Beyond the Cordillera Azul, the Río Huallaga flows north. In the south the catchment area of ​​the Río Aguaytía borders on that of the Río Pachitea , in the north on that of the Río Pisqui . The mean discharge of the Río Aguaytía is around 880 m³ / s.

Fish fauna

In a study between 1942 and 2009, a total of 211 fish species from 28 families and 9 orders were found in the river system of the Río Aguaytía . 60 percent of the species belong to the Characins (Perciformes), including 98 types of genuine tetra (Characidae), 20 percent of the catfish-like (Perciformes), including 29 representative of the loricariids (Cichlidae), and 10 percent to the tilapia (Cichlidae). A species that was only described at the end of the 20th century is the Inca stone cichlid ( Tahuantinsuyoa macantzatza ).

Individual evidence

  1. ↑ a b Quezada García MG, M. Hidalgo del Águila, J. Tarazona Barboza, H. Ortega: Ictiofauna de la cuenca del río Aguaytía, Ucayali, Perú . In: Revista peruana de biología . tape 24 , no. 4 , December 2017, ISSN  1727-9933 , p. 331–342 , doi : 10.15381 / rpb.v24i4.14061 (Spanish, org.pe [PDF; 1.1 MB ; accessed on January 24, 2020]).

Web links