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Flooded small forest stream, Ucayali River, Peru
Peru, San José, Requena
The Río Ucayali is the main headstream of the Amazon River. It rises about 110km north of Lake Titicaca, in the Arequipa region of Peru and becomes the Amazon at the confluence of the Marañón close to Nauta city. The city of Pucallpa is located on the banks of the Ucayali.
The Río Ucayali, together with the Apurímac River, the Ene River and the Tambo River, is today considered the main headwater of the Amazon River, totaling a length of 2,669.9km from the source of the Apurímac at Nevado Mismi to the confluence of the Ucayali and Marañón Rivers:
The Ucayali was first called San Miguel, then Ucayali, Ucayare, Poro, Apu-Poro, Cocama and Rio de Cuzco. Peru has organised many costly and ably-conducted expeditions to explore it. One of them (1867) claimed to have reached within 380km of Lima, and the little steamer “Napo” found its way up the violent currents for 124km above the junction.
- Submitted by
- Arif Hikmet Başeğmez
- Approved by
- Roberto E. Reis & Pablo C. Lehmann
- GPS
- -5.2086940, -73.8952255
- Geographical region
- South America
- Drainage Basin
- Rio Amazonas
- River catchment
- Río Ucayali
- Water body type
- Creek
- Water body name
- Forest stream
- Water body part
- Flood plain
- Water body course
- Lower course
- Water body: tributary of
- Rio
- Tributary name
- Ucayali
Videos above and below water
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Water Chemistry
Water information
- Water type
- fresh-water
- Water color
- Mixed water
- Water transparency
- Medium
- Concentration of sediments
- Low
- Water temperature
- °C
- Water flow/curent
- Slow
Chemical parameters
- pH
- 6.0
- Conductivity
- 30
- GH
- 53.4 mg/l
- dGH
- KH
- 0
- dKH
- Dissolved Oxygen
Substrate in nature
- Sand
- White
- Pebble/Gravel
- Stone
- Stone form
- Silt/Mud
- Leaves
- Many
- Driftwood
- Many
- Submerged terrestrial vegetation
Aquatic Biotope
- Date of collecting
- Collecting area
- Water depth
- Air temperature
- Sunlight
Environment
- Environment
- Affected by human activity
- Affected by human activity
- Agriculture
- Agriculture
- Advanced
- Surrounding area
There are forest areas around the Ucayali River, which passes through the Southern Requena region, and large and small rivers and floodplain forest streams that feed this river. It has a warmer climate than the Upper Ucayali basin. The rivers passing through the region are relatively cleaner and with less current.
- Underwater landscape
An underwater landscape dominated by fallen leaves and dead botanicals. There is also light, white and cream-coloured fine sand on the ground, plenty of driftwood and green meadows before the flood. It is not a region rich in underwater flora.
Fishlist:
- Hoplisoma trilineatus (Callichthydae)
- Hoplisoma panda (Callichthydae)
- Apistogramma cacatuoides (Cichlidae)
- Apistogramma agassizi (Cichlidae)
- Paracheirodon innesi (Characidae)
- Laetacara thayeri (Cichlidae)
Wetland plants:
- Eleocharis sp. (Cyperaceae)
Aquatic plants:
- Hydrocharis laevigata (Hydrocharitaceae)
- Pistia stratiotes (Araceae)
- Threats to ecology
Considered one of the “mother” rivers of the Amazon river, the Ucayali and its biotopes (as well as some rivers of the Amazon basin) are in degradation. The construction of large water dams, the rampant exploration of oil, the extraction of precious/heavy metals, and even the local capture and fishing of the riverside inhabitants when uncontrolled and conscious, slowly annihilates the local population of the specimens.
Riparian zone
- Trees near the aquatic habitat
-
Many -
