The Utcubamba valley

Valle del Utcubamba

The Valle del Utcubamba develops longitudinally up to the Marañon River, being the principal center of production and of location of human groups....

 is born in the high jalcas

Suni (Geography)

Suni or Jalca is one of the eight Natural Regions of Peru. It is located in the Andes at an altitude between 3,500 and 4,100 metres above sea level...

 of Chachapoyas

Chachapoyas Province

Chachapoyas is a province of the Amazonas Region, Peru. The province of Chachapoyas was a part of the department of Trujillo being its capital the city of Chachapoyas....

 and runs from the southeast to the northwest to mix with the waters of the Marañón river, forming the immense plain of Bagua. This plain

Plain

In geography, a plain is land with relatively low relief, that is flat or gently rolling. Prairies and steppes are types of plains, and the archetype for a plain is often thought of as a grassland, but plains in their natural state may also be covered in shrublands, woodland and forest, or...

 has a of warm climate, with temperatures reaching a maximum of 40 ºC and the minimum of 21 ºC.

Like in the whole high jungle

Rupa-Rupa

Rupa-Rupa or High Jungle is one of the eight natural regions of Peru. It is located between 400 and 1,000 m above the sea level. This region has lots of narrow and long valleys and fluvial mountain trails...

 region of Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

, its water regimen is irregular and sometimes without rain

Rain

Rain is liquid precipitation, as opposed to non-liquid kinds of precipitation such as snow, hail and sleet. Rain requires the presence of a thick layer of the atmosphere to have temperatures above the melting point of water near and above the Earth's surface...

s.