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Understanding the Concepts



 This activity contains 15 questions.

Question 1.
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The is the flat surface adjacent to a river channel. 

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Question 2.
Which of the following is the definition of a stream’s gradient?

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Question 3.
This question has to do with the sediment carried in a river.

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A matching question presents 4 answer choices and 4 items. The answer choices are lettered A through D. The items are numbered 3.1 through 3.4. Screen readers will read the answer choices first. Then each item will be presented along with a select menu for choosing an answer choice. Using the pull-down menus, match each item in the left column to the corresponding item in the right column.
A moves by bouncing, rolling, or skipping of particles along the bottom of the channel
B accounts for 90 percent of the total load of the river
C comprised of all the sediment that is moved in a river.
D carried in chemical solution
[hint] 
 
 
 
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Question 4.
The largest particle a river can transport is called its _______ and the total load of sediment that a river carries in a given time is called its _______.

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Question 5.
True or False? The flood hazard associated with alluvial fans and deltas is different from hazards in a river valley and floodplain environment.

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Question 6.
What type of channels are characterized by numerous gravel bars and islands that divide and reunite the channel?

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Question 7.
In a meandering stream, where does erosion take place most rapidly?

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Question 8.
The most important causes of river floods include what?

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Question 9.
True or False? The more damaging floods are upstream floods, because they occur so quickly.

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Question 10.
The _______ a flood is, the ______ frequently it is likely to occur.

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Question 11.
True or false? Urbanization increases lag time, leading to increased flooding.

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Question 12.
What is riprap?

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Question 13.
The Kissimmee River, in Florida, is an example of a failed attempt at what?

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Question 14.
Which of the following is/are involved in flood-proofing?

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Question 15.
Which of the following is a method of flood prevention?

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