Exam 15: Landforms Made by Running Water

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Which of the following features develops once a river has reached a graded condition?

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Describe and explain the erosional and depositional processes associated with slope erosion

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Slope erosion is the process by which the soil and rock on a slope are gradually worn away by natural forces such as water, wind, and gravity. This erosion can be caused by both natural processes and human activities, and it can have significant impacts on the landscape and the environment.

Erosional processes associated with slope erosion include:

1. Water erosion: This occurs when rainfall or runoff flows over the surface of the slope, carrying away soil and rock particles. This can lead to the formation of gullies and channels, and it can also result in the loss of fertile topsoil.

2. Wind erosion: Wind can also erode the soil and rock on a slope, especially in arid and semi-arid regions where vegetation cover is sparse. Wind erosion can lead to the formation of sand dunes and the loss of valuable soil nutrients.

3. Gravity erosion: Gravity plays a major role in slope erosion, as it causes soil and rock particles to move downhill over time. This can result in the formation of landslides and rockfalls, especially on steep slopes.

Depositional processes associated with slope erosion include:

1. Sediment deposition: As soil and rock particles are eroded from the slope, they are transported downslope by water, wind, or gravity. Eventually, these particles may come to rest in lower-lying areas, leading to the formation of sediment deposits.

2. Alluvial fan formation: In some cases, the sediment that is eroded from a slope may be deposited at the base of the slope, leading to the formation of a fan-shaped deposit known as an alluvial fan.

3. Delta formation: If the eroded sediment is transported by a river or stream, it may be deposited at the river's mouth, leading to the formation of a delta.

Overall, slope erosion is a natural process that can have both erosional and depositional effects on the landscape. However, human activities such as deforestation, agriculture, and construction can accelerate the rate of slope erosion and lead to significant environmental degradation. It is important to implement erosion control measures to mitigate the impacts of slope erosion and protect the health of the landscape.

Lakes and waterfalls that are created by tectonic processes are geologically long-lived features.

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The general term to describe any stream-laid deposit is:

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The apex of a(n)______________ lies at the mouth of a canyon or ravine.

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Gullies are the eventual result of which of the following erosion processes?

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Which of the following is a depositional fluvial landform?

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Where would you find a back swamp located with reference to fluvial landforms?

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Which of the following features is not a consequence of accelerated erosion associated with vegetation loss?

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Using examples from your local region,describe the development of waterfalls or lakes and their role in the landscape and in human activities.

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Where stream channels flow on bedrock,material is removed mostly by the process of hydraulic action.

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A stream in an equilibrium condition whereby it can just carry the average of load of sediment that it receives from slopes and inflowing channels is referred to as a/an:

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Which of the following types of channel is associated with alluvial fans?

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Stream transportation consists of movement of the eroded particles dragged over the stream bed,suspended in the body of the stream,or held in solution as ions.

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Sequential landforms that are shaped by progressive removal of the bedrock mass are __________________ landforms.

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As water flow increases,a stream flowing in a channel that is cut into thick layers of alluvium will easily deepen its channel.

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Using examples from the news or an historic case study,describe and explain the progression of events during a flood.

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Compare and contrast slope erosion in humid and in arid or semi-arid regions.

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Using an annotated diagram describe the formation of ox-bow lakes.

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Which of the following statements describing the grading of a river is incorrect?

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