Happy World Rivers Day!

It’s World Rivers Day–a global celebration of the Earth’s waterways and the life they support. Celebrate by learning about river deltas! 

Published September 24, 2017

Deltas are wetlands that form where rivers empty their water and sediment into another body of water, such as an ocean, lake or another river.

river-delta

Deltas are important to humans, fish and other wildlife because they hold very fertile soil and support a variety of vegetation. 

Many animals are indigenous to the shallow waters of a delta. Fish, crustaceans, birds and even predators such as tigers and bears can be part of a delta's ecosystem. A variety of plants and herbs—such as lilies and hibiscus—also thrive in this unique ecosystem.

Deltas absorb runoff from both floods and storms, and filter water as it makes its way through the delta's distributary network. This can reduce the impact of pollution flowing from upstream. 

The term delta comes from the Greek letter delta, which is shaped like a triangle. Deltas with this triangular shape are called arcuate “arc-like” deltas. One example is the Nile River, which forms an arcuate delta as it empties into the Mediterranean Sea.

You can help protect river deltas wherever you are!

 
Previous Post

Featured Stories

Staff releasing rescue sea turtle on beach Animal Rescue Update: April Rescue Turtle Release

Yesterday, National Aquarium Animal Rescue released 36 rescue turtles from Little Talbot Island State Park in Florida!

Read the full story

Artificial oyster reef in Baltimore's Inner Harbor Harbor Happenings: Artificial Oyster Reef

The National Aquarium is taking another step to revitalize Baltimore’s Inner Harbor and attract native species with a new artificial oyster reef using shells from the Oyster Recovery Partnership!

Read the full story

Related Stories

Happy World Rivers Day!

Published September 29, 2014

Federal Government Donates Confiscated Coral to the National Aquarium

Published September 24, 2013