Estuary — Free Oceanography Illustration

Oceanography

Estuary

Top-down 2D plan-view diagram of an estuary as a broad semi-enclosed coastal water body with a funnel-shaped or slightly branching basin. The inland end is narrow like a river mouth and widens smoothly toward a broad ocean-facing opening. Show smooth blue to blue-green brackish water, optionally with muddy brown freshwater channels blending into seawater or a subtle color gradient suggesting mixing. Shorelines are gently curving to softly irregular, with muddy, marshy, or sandy margins and occasional branching channel edges, emphasizing the transitional inlet between river and sea.

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