Every river has a source - a place where it originates, and the mouth - an area of its merger with another watercourse.Water flows which are connected to the oceans, seas or lakes are primary, while those that fall directly into the river, called tributaries.
They occur in the valleys, that is, places where the relief is extended and lowered.The point of maximum lowering - the river bed.Understand named part of the valley, which is constantly filled with river water.
River - what is it?
called River water flow, often formed in a natural way.It flows in a direction from its source to its mouth;It eats a variety of ways: the snow, ice, and other underground waters.
streams are formed due to the accumulation of water in the valley.Usually, the cause of their formation are abundant and regular rainfall, snowmelt, ice and so on. F. When the construction of dams or dikes are formed of the reservoir, which may be lakes or even seas.However, in this case, they will be no current, and they are usually artificially.
Basically, all the streams flow along faults in the relief, there is no resistance and voltage.
riverbed
As mentioned above, the channel of the river - the place in the valley, the level of reduction which reaches a peak.It is divided into several types.One of them - the main channel.This is the name given area on the river, which is a large part of the watercourse.
Depending on the size of the riverbed can reach enormous width, which varies from one meter to several tens of kilometers.The depth does not increase with the expansion of the watercourse.And very often it happens that at the site of a large spill - shallow water.In mountain rivers channel can have rapids and waterfalls.By its tortuous path distinguish the lower part of the valley - in lowland rivers, and direct - in the mountain.
former riverbed called the bayou.Typically, it is presented in the form of a sickle, loops or a straight line.Formed after due to the strong flow of the water stream breaks a new path.After that, most of the water does not get into the old channel and a so-called bayou.In the end it either dries up or completely overgrown with water plants.
Change riverbed often occurs artificially.In such a case, this leads to irreversible consequences that are difficult to eliminate afterwards.
floodplain
Understand named part of the river that is constantly susceptible to flooding during floods or high water.Often, its size depends on the width of the channel, but not always.It can vary by a few meters, and sometimes - and kilometers.
floodplain soils are fertile only if the flow of water, flooding the land, bring silt.Typically, this location is excellent for fishing.
Terraced called former floodplain areas, in which the water level is several times higher than in the mainstream, even during floods and floods.
origins and estuary
source of the river is called the place where it starts.Often these are small swamps or streams.If the river system has a lot of sources, primarily will be the one that most or high water, or as far from the mouth of the watercourse.Very often, the beginning of the river can be considered the confluence of water bodies or watercourses.
Estuary - a place in which flows a watercourse.This can be any lake, sea, water reservoir, another river.Its structure is different.For example, sometimes at the point of confluence of the pond can form a delta, or lip.
riverbed, flood plain, the source and the mouth - it's not all that distinguishes the river.Besides these, there are also coast (border river), stretches (sites with the greatest depth), rolls (areas with the lowest depth).Those parts of the river, where the strongest flow velocity were called rod.
