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Chapter 17: Problem 21

Relate some of the specific problems humans encounter in building on periglacial landscapes.

Short Answer

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Building on periglacial landscapes presents challenges such as ground instability due to freeze-thaw cycles, potential thawing of permafrost, foundation issues due to ground heaving and subsidence, and difficult working conditions due to extreme cold. Solutions include design adjustments to minimize heat transfer, use of appropriate materials, and altering construction timelines to leverage stable winter conditions.

Step by step solution

01

Identify the Characteristics of Periglacial Landscapes

Understanding the characteristics of periglacial landscapes is the first step. They are typically characterized by freeze-thaw cycles that lead to the formation of unique landforms and soil structures, such as patterned ground, frost heaves, and thermokarst topography.
02

Understand the Challenges

Several challenges are associated with constructing in such environments. These include ground instability due to freeze-thaw cycles, the presence of permafrost which when thawed can lose its strength, issues with foundations due to ground heaving and subsidence, and difficult working conditions due to extreme cold and the presence of ice.
03

Explore Solutions

Various solutions have been proposed to deal with these challenges. These include designing structures to minimize heat transfer to the ground, using materials that can withstand the freeze-thaw cycles, and even changing the timing of construction activities to take advantage of more stable winter conditions.

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Most popular questions from this chapter

In terms of climatic types, describe the areas on Earth where periglacial landscapes occur. Include both higherlatitude and higher-altitude climate types.

Differentiate between two forms of glacial drift—till and outwash.

Describe the role of ice cores in deciphering past climates. What record do they preserve? Where were they drilled?

Describe the role of frost action in the formation of various landform types in the periglacial region, such as patterned ground.

Contrast a roche moutonnée and a drumlin with regard to appearance, orientation, and the way each forms.
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