BuyFind

Fundamentals of Physical Geography

2nd Edition
James Petersen
Publisher: CENGAGE L
ISBN: 9781133606536
BuyFind

Fundamentals of Physical Geography

2nd Edition
James Petersen
Publisher: CENGAGE L
ISBN: 9781133606536

Solutions

Chapter 15, Problem 1FQ
Textbook Problem

Chapter 15, Problem 1FQ, FIGURE 15.1 In almost all deserts the effects of running water are prominent in the landscape. What

FIGURE 15.1 In almost all deserts the effects of running water are prominent in the landscape.

What are some possible reasons why this terrain is so intensely channelized?

Expert Solution
To determine

The possible reasons that make this terrain so intensely channelized.

Answer to Problem 1FQ

The presence of easily eroded earth materials and lack of vegetation make high drainage density. Much runoff is generated by the barren slopes that easily cult gullies in the erodible materials.

Explanation of Solution

The desert sceneries are typically dominated by landforms rather than vegetation. The evaporation and precipitation regimes of a desert climate cause sparse vegetation cover; due to the fact that most processes of weathering require water, it results also in low weathering rates. The moisture-retentive soil cannot accumulate on slopes due to low rates of weathering, insufficient vegetation that is required to break the force of raindrop impacts, and absence of a wide network of plant roots to provide a support to hold fragment of rock in place. As a result, the soil present in those areas tends to be thin, rocky, and discontinuous. The absence of a continuous cover of vegetation and soil provides a unique character to the landforms in deserts.

Much amount of rain that falls in the desert becomes suddenly surface runoff to accomplish fluvial geomorphic work in a surface condition that is characterized by very limited interception and low permeability. Since the ability to hold grains in place is less, the grains that are loosened as a result of weathering will be swept away in surface runoff that is produced by the next storm. The effects resulting from activity of running water are also extensively evident on slopes and also in bottom of valley even though the desert landscapes strongly reflect water deficiency.

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Chapter 15 Solutions

Fundamentals of Physical Geography
Ch. 15 - FIGURE 15.18 Dust storms occur when strong winds...Ch. 15 - FIGURE 15.21 Eolian erosion carves yardangs,...Ch. 15 - FIGURE 15.24 Active dunes migrate downwind as...Ch. 15 - FIGURE 15.25 The rolling, grazing lands of the...Ch. 15 - FIGURE 15.26 A small barchan in southern Utah. Why...Ch. 15 - What factors influence which type of dune will be...Ch. 15 - FIGURE 15.28 A small part of an extensive...Ch. 15 - FIGURE 15.30 A steep gully eroded into the thick...Ch. 15 - FIGURE 15.33 Uluru (Ayers Rock) is a striking...Ch. 15 - Describe the general topography of the map area.Ch. 15 - What is the lowest elevation on the map? How is it...Ch. 15 - What specific type of arid region landform is...Ch. 15 - What surface materials most likely compose the...Ch. 15 - What is a likely cause of the salinity of Salt...Ch. 15 - Consider the stream system that flows onto the map...Ch. 15 - Do you think the streams portrayed on this map...Ch. 15 - Now consider the large zone of almost parallel,...Ch. 15 - Describe how the form of the feature discussed in...Ch. 15 - he map region lies at about 36N. Considering its...Ch. 15 - What are some ways desert streams differ from...Ch. 15 - How do basins of interior drainage differ from...Ch. 15 - What distinguishes a plateau from a mesa and a...Ch. 15 - How does an alluvial fan differ from a pediment?Ch. 15 - What are playas and why are they commonly found in...Ch. 15 - Why is wind a weaker geomorphic agent than running...Ch. 15 - How are eolian erosion and transportation...Ch. 15 - How does formation of a deflation hollow differ...Ch. 15 - Explain the main differences between a barchan and...Ch. 15 - What are some ways climate and vegetation affect...Ch. 15 - A stream flowing out of a canyon mouth onto the...Ch. 15 - A barchan in Arizona migrated the following total...Ch. 15 - Using Google Earth, identify the landforms at the...

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