Chapter 6

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If a river originates 200 meters above Sea Level and travels 400 Km to the ocean, what is the average gradient in meters per Km?

0.5m/km

What type of stream valley would form in a mountainous area?

A Narrow V-Shaped Valley

What is a Natural Levee?

A depositional feature parallel to the stream channel

What are permeable rock layers or sediments that transmit groundwater freely called?

Aquifers

People use what traditional flood control method has been to attempt to keep the streams flow within its channel m?

Artificial Levees

What is the measure of the largest particles a stream can carry?

Competence

A floodplain forms where a Stream tends to do what?

Cuts mainly side to side

What is s depositional feature that forms where a steam enters a lake or ocean?

Delta

What are the boundaries called that separate streams in adjacent drainage basins?

Divides

The average animal precipitation worldwide must equal what quantity of water in the hydrologic cycle?

Evaporated

What is the flat portion of a valley floor adjacent to a stream channel called?

Floodplain

What is the vertical drop of a stream channel over a certain distance called?

Gradient

Plants release water into the atmosphere through what process?

Transpiration

In the Figure 6-1, what process is Illustrated by the arrows labeled D?

Infiltration

Carverns most commonly form in what type of bedrock?

Limestone

Along straight stretches of a stream channel, The highest veto cities of water are found in what part of the stream?

Near the water surface in the center of the stream

What process is Illustrated by the arrows labeled A in Figure 6-1?

Precipitation

When can sinkholes form?

Rainwater containing carbon dioxide dissolves underground rock

What are the most prominent features of a narrow V-Shaped Valley, where the stream profile drops rapidly?

Rapids and Waterfalls

What is the single most important erosional agent on earth?

Running Water

Groundwater is found in what underground zone?

Saturation

What is typical of the suspended load of a stream?

Usually consists of fine sand, silt, and clay-sized particles

The ability of a stream to erode and transport Material depends largely on what Factor of the stream?

Velocity

What is a drainage basin?

The loud area that contributes water to a stream

What is a base level of a stream?

The lowest point to which a stream can erode its channel

What does balance in the water cycle mean?

The rate of precipitation will always equal the rate of evaporation

Using the profile of a typical stream, what type of Gradient would you expect to find?

The steepest near the head

As a stream discharge increases, What occurs to its velocity, width, and depth?

Stream Velocity Channel Width, And Depth al Increases

What is a ultimate base level of a stream?

The Ocean

What is the energy source for the water cycle shown in Figure 6-1?

The Sun


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