What is a stream terrace quizlet?
What is a stream terrace? a remnant of an older floodplain that sits above the stream valley.
What determines whether a stream is straight braided or meandering?
A threshold slope was experimentally determined to be 0.016 (ft/ft) for a 0.15 cu ft/s (0.0042 m3/s) stream with poorly sorted coarse sand. Any slope over this threshold created a braided stream, while any slope under the threshold created a meandering stream or – for very low slopes – a straight channel.
What are water gaps quizlet?
What are water gaps? erosion through hills or ridges caused by a change in base level. Describe the erosion occurring during headward erosion. erosion backwards at the start of the stream.
What is the primary energy source that drives the hydrologic cycle and most other cycles on Earth?
The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air.
What is the difference between a Strath stream terrace and a fill stream terrace?
Selected Answer: strath terraces are eroded into bedrock, where as fill terraces are deposits of old stream sediments Correct Answer: strath terraces are eroded into bedrock, where as fill terraces are deposits of old stream sediments Response Feedback: Strath terraces formed when the stream eroded bedrock.
What do stream terraces represent?
River terrace, bench or step that extends along the side of a valley and represents a former level of the valley floor. A terrace results from any hydrological or climatic shift that causes renewed downcutting.
What causes a stream to become braided?
Braided streams typically get their start when a central sediment bar begins to form in a channel due to reduced streamflow or an increase in sediment load. The central bar causes water to flow into the two smaller cross sections on either side. The smaller cross section results in a higher velocity flow.
Why is river Brahmaputra braided?
Brahmaputra is a braided river because it one of the number of channel type and has a channel which consists of network of small channels which are separated by small islands which braids.
Which part of a stream would you expect to find the largest discharge?
Cross-sectional shape varies with position in the stream, and discharge. The deepest part of channel occurs where the stream velocity is the highest. Both width and depth increase downstream because discharge increases downstream.
What are water gaps?
A water gap is a gap that flowing water has carved through a mountain range or mountain ridge and that still carries water today. Such gaps that no longer carry water currents are called wind gaps.
What type of drainage pattern develops on highly jointed bedrock?
Rectangular drainage patterns have rivers with right-angle bends. They form where the bedrock is faulted and jointed.
What are the three main zones of a river system from highest to lowest?
Three zones are usually recognized – headwaters, where flow is usually lowest of any where along the system, slope is often steepest, and erosion is greater than sediment deposition; transfer zone, the middle range of the stream where slope usually flattens somewhat, more flow appears, and deposition and erosion are
Why is water cycle called a cycle?
The water cycle, also known as the hydrologic cycle, describes the continuous movement of water as it makes a circuit from the oceans to the atmosphere to the Earth and on again. Most of Earth’s water is in the oceans. The sun, which drives the water cycle, heats water in the oceans.
What is water cycle in short?
The Short Answer: The water cycle is the path that all water follows as it moves around Earth in different states. Liquid water is found in oceans, rivers, lakes—and even underground. The water cycle is the path that all water follows as it moves around our planet.
Where is most of the water on Earth stored?
The ocean holds about 97 percent of the Earth’s water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world’s total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.