A ria
The part of the wide lower course of a river where its current is met by the tides.An arm of the sea that extends inland to meet the mouth of a river.
The River Jordan, for example, flows into the Dead Sea, an inland sea.
The river Delta. Like the Nile River Delta.
a waterfall <><><> A river
delta
That is called the river's mouth. A delta could form there from the sediments settling there do to the river slowing down or stopping.
A river. Rivers have a "mouth" where they meet a larger body of water, like an ocean, that is always open but does not produce words.
Fresh water and salt water meet at a river's mouth, where fresh water becomes salty and is known as brine. This mixing often occurs in an estuary, where the river widens.
You can definitely find seaweed in estuaries. An estuary is defined as a place were sea tides and river water meet, at the mouth of the river. Due to high tides salt water can be forced a long way up the river, thereby creating a partially marine environment well inland. The salinity of the water therefore changes from high to low over a twelve-hour cycle, but many organisms, not just seaweeds, can cope with changes of salinity and colonise these estuarine areas. Algae such as the Bladderwrack, Fucus vesiculosus, have very high tolerance to low salt levels and can be found a long way inland of many river estuaries.
Both rivers are in Ireland but they do not meet.
A river
St. Louis is where the Missouri River and the Mississippi River meet.