Unit 39 Review Questions

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. Rainsplash erosion:

is enhanced in the presence of vegetation correct incorrect

is independent of the size and velocity of raindrops correct incorrect

acts in opposition to sheet erosion correct incorrect

is more significant on steeper slopes correct incorrect

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. Which of the following factors acts to increase the sediment yield of a drainage basin?

Large amount of relief correct incorrect

Extensive vegetation correct incorrect

Low precipitation amounts correct incorrect

Hard crystalline surface rocks correct incorrect

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. In a stream, the largest particles are transported through:

suspension correct incorrect

dissolution correct incorrect

traction correct incorrect

saltation correct incorrect

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. Regarding the ability of a stream to move material, it is true that:

most streams are usually at or near the maximum sediment load they can carry correct incorrect

a mountain stream can have higher competence than a very large river correct incorrect

the competence of a stream decreases as its slope increases correct incorrect

the higher the discharge rate, the lower the transport capacity correct incorrect

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. Ultimate base level for the Mississippi River:

varies depending on sediment load correct incorrect

occurs where it is joined by the Missouri River correct incorrect

occurs where it meets the Gulf of Mexico correct incorrect

varies depending on competence correct incorrect

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. Incision:

counteracts efforts to create a graded stream correct incorrect

acts primarily in areas of substantial deposition correct incorrect

works to raise the bed of a stream correct incorrect

greatly decreases the transport capacity of a stream correct incorrect