Rivers Wallpaper, #3405

A river is a natural stream of water, usually freshwater, flowing toward an ocean, a lake, or another stream. In some cases a river flows into the ground or dries up completely before reaching another body of water. Usually larger streams are called Rivers while smaller streams are called creeks, brooks, rivulets, rills, and many other terms, but there is no general rule that defines what can be called a river. Sometimes a river is said to be larger than a creek, but this is not always the case.The river channel typically contains a single stream of water, but some Rivers flow as several interconnecting streams of water, producing a braided river. Extensive braided Rivers are found in only a few regions worldwide, such as the South Island of New Zealand. They also occur on peneplains and some of the larger river deltas. Anastamosing Rivers are similar to braided Rivers and are also quite rare. They have multiple sinuous channels carrying large volumes of sediment.The straight-line distance from the beginning to the end of most Rivers is about one third their actual length.Most Rivers flow on the surface; however subterranean Rivers flow underground in caves or caverns. Such Rivers can be found in remote regions like Antarctica with limestone geologic formations.The rocks and gravel generated and moved by Rivers are used in construction. The beauty of Rivers and their surroundings contributes to tourist income.