What is permafrost and what are some of the problems associated with it?
Permafrost is a subsurface layer of permanently frozen ground, which could be only a few feet, or it could go all the way to several hundred feet. When this area begins to thaw out, we end up with pools of standing water that is highly susceptible to insects and large numbers of mosquitoes. This area remains a very boggy and shifty area. Construction is very difficult in this area. If you build a house directly on the ground, then the heat that is released from under the house will cause melting of the permafrost. Thus, the construction will begin to sink. If this continues, it will just get deeper and deeper. So it is typical for someone to have to put pilings under a home to combat the permafrost issues.
You might also like to view...
Where is the difference between frontal boundaries so slight that the uplift necessary to create thunderstorms is lacking?
A) Northeast B) Southwest C) Pacific Northwest D) Southeast
A chart that plots how air temperature has changed over the past five days at a given station is a(n) ____
A) sounding B) meteogram C) atmospheric model D) ensemble forecast
The shape of a country's population pyramid
A) may be used to predict maternal mortality rates. B) cannot be used to determine infant mortality rates. C) may be used to estimate the country's dependency rate. D) cannot be used to estimate the country's sex ratio. E) is determined primarily by the combination of its crude birth rate and its crude growth rate.
Japan's principal asset in promoting development is
A) a favorable ratio of population resources. B) an abundant supply of labor. C) high physiological density. D) extensive supplies of critical raw materials.