are all estuaries influenced by tides?

Question

are all estuaries influenced by tides?

Answer 1

An estuary occurs when a fresh-water river meets a salt-water sea or ocean. Typically, the resulting area is a marshy mix of shallow water and sediment, interspersed with low-lying hummocks of soil that may (at times) be above the water's surface.

Because ALL bodies of "standing" water (seas, lakes, oceans, ponds, pools, etc) are affected by the moon such that a tide is created, then any other body of water (such as a river) that intersects directly with the standing water must also be affected to some extent.

In the case of an estuary - yes, it is affected by tidal action.

Of course, the larger the body of standing water, the larger the tidal effect.

Answer 2

Yes, because estuaries are influenced by tides. They depend entirely on the tides.

Answer 3

That's how it is defined in my dictionary so the answer is YES.