'Boundary rivers are those which separate different states from each other. If such a river is not navigable, the boundary line as a rule follows the mid-line of the river ...
You can use the noun shoreline to talk about the strip that marks the boundary between land and water, whether it's at the edge of an ocean, sea, lake, or river. While the word "coast" refers specifically to the ocean, shoreline or shore can be used for any body of water.
If a river changes course quickly, cutting a new channel, then a landowner with property on just one side of a river suddenly may end up owning property on both sides. The rapid change of the river's location, known as avulsion, does not alter ownership boundaries.
This site is referred to as the channel head and it marks an important boundary between hillslope processes and fluvial processes. The channel head is the most upslope part of a channel network and is defined by flowing water between defined identifiable banks.
Although in some countries the term maritime boundary represents borders of a maritime nation that are recognized by the United Nations Convention on the Law of the Sea, maritime borders usually serve to identify the edge of international waters.
The boundary of a coast, where land meets water, is called the coastline. Waves, tides, and currents help create coastlines.
All rivers naturally change their path over time, but this one forms meanders (the technical name for these curves) at an especially fast rate, due to the speed of the water, the amount of sediment in it, and the surrounding landscape.
If the river runs through a landowner's land, that landowner will own the riverbed. Whereas if the river forms a boundary of a landowner's land, that landowner will own the riverbed up to the centre of the river along the stretch of the river which forms their boundary, their neighbour owning the other half.
A Regulation for declaring the rules to be observed in determining claims to lands gained by alluvion, or by dereliction of a river or the sea.
A river begins at a source (or more often several sources) which is usually a watershed, drains all the streams in its drainage basin, follows a path called a rivercourse (or just course) and ends at either at a mouth or mouths which could be a confluence, river delta, etc.
A floodplain (or floodplain) is a generally flat area of land next to a river or stream. It stretches from the banks of the river to the outer edges of the valley. A floodplain consists of two parts. The first is the main channel of the river itself, called the floodway.
The headwater can come from rainfall or snowmelt in mountains, but it can also bubble up from groundwater or form at the edge of a lake or large pond. The other end of a river is called its mouth, where water empties into a larger body of water, such as a lake or ocean.