A perennial river can be defined as a river that is <u>continually flowing </u><u>throughout the </u><u>year </u><u>in at least some parts. </u>
A lot of rivers tend to dry up in the dry seasons because the supply of water from rain would be gone.
Perennial rivers:
- Are capable of flowing all year round.
- Include examples such as the Nile, the Mississippi, and the Amazon.
In conclusion, a perennial river is continuously flowing.
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From thousands to millions of years
During a de la niña event, the environmental changes that the tropical pacific ocean and its surrounding landmasses would likely experience would be the attraction of more cold-water species such as salmon and squid.
<h3>La niña</h3>
This is a natural oceanic-climatic phenomenon that consists of the cooling of the waters of the Pacific. The winds are stronger and push the hot water towards Asia, while in America, there is the cooling of the waters and the presence of nutrients on the surface.
It usually occurs over periods of two to seven years, and makes winter temperatures warmer in the South and cooler in the North.
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