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A river is a natural flow of freshwater that flows on or through land towards another body of water downhill. [1] This flow can be into a lake, an ocean, or another river. [1] A stream refers to water that flows in a natural channel, a geographic feature that can contain flowing water. [2] A stream may also be referred to as a watercourse. [2]
a reservoir built to provide flowing water to a watermill. Moat: a deep, broad trench, either dry or filled with water, surrounding and protecting a structure, installation, or town. Mud puddle: Nant: Stream: Wales. [33] Ocean: a major body of salty water that, in totality, covers about 71% of the Earth's surface. Oxbow lake
The water in this stream forms varying currents as it makes its way downhill. In hydrology, a current in a water body is the flow of water in any one particular direction. The current varies spatially as well as temporally, dependent upon the flow volume of water, stream gradient, and channel geometry.
The flow of liquid water and ice transports minerals across the globe. It also reshapes the geological features of the Earth, through processes including erosion and sedimentation. The water cycle is also essential for the maintenance of most life and ecosystems on the planet. Human actions are greatly affecting the water cycle.
There are three basic types of freshwater ecosystems: Lentic (slow moving water, including pools, ponds, and lakes), lotic (faster moving water, for example streams and rivers) and wetlands (areas where the soil is saturated or inundated for at least part of the time). Limnology (and its branch freshwater biology) is a study about freshwater ...
Australian creek, low in the dry season, carrying little water. The energetic flow of the stream had, in flood, moved finer sediment further downstream. There is a pool to lower right and a riffle to upper left of the photograph. A small, narrow stream flowing down a tiny dell in Pennsylvania.
The Tennessee River flowing through the Tennessee River Gorge The "Steamboat Bill" Hudson Memorial Bridge in Decatur, Alabama Natchez Trace Parkway, crossing the Tennessee River in Cherokee, Alabama The Tennessee River is a 652 mi (1,049 km) long river located in the southeastern United States in the Tennessee Valley .
For example, they recycle nutrients, purify water, attenuate floods, recharge ground water and provide habitats for wildlife. [16] The biota of an aquatic ecosystem contribute to its self-purification, most notably microorganisms, phytoplankton, higher plants, invertebrates, fish, bacteria, protists, aquatic fungi, and more.