Streams form when downhill running water creates a channel capable of carrying water. Most streams begin as temporary rivulets that only have water after a rainfall.Know More
While a stream is still an intermittent waterway, water flow during and shortly after rainfall creates a small channel in a downhill slope that carries water. With the passage of time and continuous rain events, the stream's channel becomes deeper. When the channel is deep enough, it collects enough groundwater to keep it full between rain events and becomes a permanent stream.
When streams form on opposite sides of a slope, weathering and erosion cause a low area, or saddle, to form. In situations in which one side of the slope is steeper than the other, one stream erodes faster and cuts into the saddle to form a pass. Mountain passes provide a natural route for travel in mountain ranges.
The channels of young streams often have steep sides and rough, steep topography, which leads to waterfalls and rapids. As the stream ages, weathering and erosion smooth the channel, and the stream widens and becomes still. Older streams tend to have wide, gentle curves, or meanders, due to the force of water against the channel walls.Learn more about Landforms
The Grand Canyon was formed primarily by erosion from the constant water flow of the Colorado River. This erosion occurred gradually over the past 5 to 6 million years.Full Answer >
A delta is an area of land in which a river divides into smaller rivers and empties into a larger body of water. It is also possible to have a delta that empties into land, but it is uncommon.Full Answer >
Coastal plains are flat, low-lying pieces of land that feature a body of water on one side and some type of landform on the other. According to National Geographic, a coastal plain can form either as a continental shelf or when water currents carry sedimentary materials that build up over time.Full Answer >
A geyser is essentially an underground hot spring that, owing to pressure exerted against its constricted plumbing toward the surface of the ground, issues a stream of steam and boiling water from time to time. The term "geyser" is derived from the Icelandic word "geysir," which means to rush forth. A geyser stops erupting once its reservoir is empty, or the water below the surface cools.Full Answer >