unit 12
Which of the placemarks in the Water Diversion folder does not include the alteration of surface stream flow for the purpose of agriculture?
D
Where does Hungary get most of its drinking water?
Danube River
Where do deposition and erosion of material occur along a meander?
Deposition occurs on the inside of the meander, whereas erosion occurs on the outside.
Why does the European Union want to deepen the Danube River?
to accomodate large ships
Why were the Iron Gates Dams constructed?
to provide hydroelectric power
How many dams, not including the two dams placemarked in the Dams folder, impound the Colorado River between Glen Canyon and Lake Havasu?
2
Which of the placemarks in the Stream Order folder is labeled with the most accurate stream order number?
2
As a river flows from its upper reaches to its lower reaches, how does the shape of the stream channel change?
As a river flows from its upper reaches to its lower reaches, it gets wider.
Which of the placemarks in the Stream Types folder represents an ephemeral stream?
B
Which of the polygons in the Runoff folder would likely have the greatest amount of surface runoff during a rain event?
B
In a meandering river, where does most of the channel erosion occur?
In a meandering river, most of the channel erosion occurs on the outside bend of the stream.
How are oxbow lakes formed?
Oxbow lakes form when one meander erodes into another, cutting off water to part of the stream channel.
What is an effect of deepening the Danube River?
less water for the floodplain
Double-click the Drainage Pattern C placemark. Which type of drainage pattern is this?
trellis drainage
Which processes result in the widening of the floodplain of a meandering stream?
undercutting and lateral erosion
How do the wetland areas of the Danube affect the water supply?
They act as filters to purify groundwater.
The flow of water is faster in what part of a river?
Water flows faster in the upper reaches of a river.
What is a floodplain?
a flat surface next to a river channel
What is a meander scar?
a landscape feature formed after an oxbow lake dries up
What is an oxbow lake?
a meander that has been cut off from the original stream channel
What is a stream terrace?
a remnant of an older floodplain that sits above the stream valley
What is a natural levee?
a ridge of flood deposits next to a river channel
Why was the Danube River rerouted around the city of Vienna?
all of the above
Double-click the Drainage Pattern F placemark. Which type of drainage pattern is this?
dendritic drainage
Double-click the Drainage Pattern D placemark. Which type of drainage pattern is this?
deranged drainage
What is the dominant fluvial process in a clear, sediment-poor stream moving down a steep slope?
downcutting
What factor is threatening the Danube River?
expansion of river transportation and intensive farming
Which of the following are part of the bed load? CHOOSE ALL THAT APPLY.
gravel, sand
If a stream's velocity is doubled, its competence ________.
increases 4 times
Complete this analogy: Sliding is to gravel as dissolution is to_____________.
ions
What is one benefit of organic farming methods?
limited use of pesticides
What type of stream is associated with the formation of an oxbow lake?
meandering stream
Double-click the Drainage Pattern B placemark. Which type of drainage pattern is this?
parallel drainage
Double-click the Drainage Pattern A placemark. Which type of drainage pattern is this?
radial drainage
Double-click the Drainage Pattern G placemark. Which type of drainage pattern is this?
rectangular drainage
How can pieces of rock in contact with a stream bed move?
rolling, sliding, bouncing
The Danube River flows from __________.
the Black Forest in Germany to the Black Sea
What is suspended load?
the fine-grained particles that travel in the water column above the stream bed
Imagine a valley containing four stream terraces. Where would the youngest stream terrace be found?
the lowest terrace
When do streams erode laterally?
when downcutting is occurring in easy-to-erode sediment or rock
When do stream terraces form?
when streams exist under alternating erosional and depositional conditions
What is the stream gradient of the Arkansas River between the two placemarks in the Stream Gradient folder?
7.22 meters/kilometer
Which of the placemarks in the Stream Channel Patterns folder best resembles a braided stream pattern?
A
What instrument was used in this video to measure flow rates in the river?
A water wheel was used to measure flow rates in the river.
Which of the following solutions would improve the water quality of the Danube River?
Build sewage treatment facilities.
Which of the placemarks in the Cedar Rapids folder is located outside the 100-year floodplain zone?
C
Which of the placemarks in the Stream Drainage Patterns folder represents a radial drainage pattern?
C
Which line contained in the Drainage Divide folder best represents a drainage divide?
D
Which of the labeled placemarks in the Floodplain Landforms folder would have the highest active rate of deposition?
D
How does the formation of a natural levee impact flooding?
Natural levees raise the height of the stream channel, reducing the amount of flooding that will occur on the floodplain.
How many stream terraces can exist along a single valley?
No limit exists. Stream terraces will keep forming as long as lateral erosion and downcutting continue.
Are stream terraces depositional or erosional landforms?
Stream terraces can be either depositional or erosional.
Double-click the Drainage Pattern E placemark. Use the visibility slider to adjust the transparency of the map overlay from opaque to transparent and back so that you can view the terrain as well as the stream channels. Which type of drainage pattern is this?
annular drainage
What are the three types of loads carried by streams?
bed load, suspended load, dissolved load
________ is an expression of the total load a stream can transport.
capacity
Complete this analogy: Bouncing is to sand as suspension is to_____________.
clay
