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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

Now consider the large zone of almost parallel, curved contours in the south-central part of the map. Does that feature appear to be of fluvial or eolian origin? What do we call a single occurrence of that type of landform? How many other examples of this landform type appear on the map?

To determine

Whether the feature is fluvial or aeolian origin by considering the large zone of almost parallel, curved contours in the south-central part of the map and describe the term that used to denote a single occurrence of that type of landform. Also, find out the number of examples of this landform type appear on the map.

Explanation

The large zone of almost parallel, curved contours in the south-central part of the map is an alluvial fan and is formed by the action of rivers. Therefore, it is fluvial in origin. At least three such features can be identified on the given map.

When the different types of streams present in arid areas such as ephemeral, intermittent or even perennial rivers flow out of narrow upland canyons onto the open, less-confining lowland plains, the channels become shallow and wide. Since the stream discharge equals cross-sectional width and depth of channel multiplied by the velocity of flow, the increase in width results in the decrease of flow velocity and thereby reduce the stream capacity. It can be defined as the maximum size of load and the stream capacity, which is the maximum amount of the load. As the water seeps into the coarse channel alluvium, the discharge decreases downstream. It leads to the deposition of sediments that are carried by streams emerging from mountain front canyon along the base of the highlands...

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