Río Tulumayo

Río Tulumayo
Río Tulumayo near San Ramón
Data
location	Peru
River system	Amazon
Drain over	Río Chanchamayo  → Río Perené  → Río Tambo  → Río Ucayali  → Amazon  → Atlantic Ocean
Headwaters	Cordillera Huaytapallana 11 ° 52 ′ 31 ″  S , 75 ° 3 ′ 48 ″  W.
Source height	approx.  4800  m
Association with	Río Tarma to Río Chanchamayo Coordinates: 11 ° 7 ′ 10 ″  S , 75 ° 20 ′ 51 ″  W 11 ° 7 ′ 10 ″  S , 75 ° 20 ′ 51 ″  W
Mouth height	approx.  800  m
Height difference	approx. 4000 m
Bottom slope	approx. 38 ‰
length	approx. 105 km
Catchment area	approx. 3300 km²
Left tributaries	Río Tambillo, Río Monobamba, Río Aynamayo
Right tributaries	Río Maranchocha, Río Shimayacu
Reservoirs flowed through	Chimay dam
Small towns	San Ramón
Río Tulumayo near San Ramón, view upstream

The Río Tulumayo is the right source river of the Río Chanchamayo in central Peru , in the provinces of Concepción , Jauja and Chanchamayo of the administrative region Junín .

River course

The Río Tulumayo rises in the Cordillera Huaytapallana at an altitude of about 4800  m , 3 km north of the main summit Huaytapallana ( 5557  m ). The Río Tulumayo is fed by a glacial lake . It flows in a predominantly north-northwest direction through the Peruvian Central Cordillera . At river kilometer 35, the tributaries Río Maranchocha from the right and Río Tambillo from the left meet the Río Tulumayo. This is dammed up immediately afterwards, at river kilometer 34.5 from the Chimay dam . Below this, most of the water is fed to the Chimay hydropower plant via a 9170 m long pipe . Below this, 500 m above the confluence of the Río Monobamba , the water returns to the river. The Río Tulumayo flows along the eastern outskirts of San Ramón before it meets the Río Tarma coming from the west and unites with this to the Río Chanchamayo.