Estuary

Meaning, Term, and Glossary Definition - What is Estuary?

Region of interaction between rivers and near-shore ocean waters, where tidal action and river flow mix fresh and salt water. Such areas include bays, mouths of rivers, salt marshes, and lagoons. These brackish water ecosystems shelter and feed marine life, birds, and wildlife.

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Related glossary terms:

National Estuary Program   
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