Chapter 6
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