Permafrost in Canada:
Permafrost is the thermal condition of the earth's crust when its temperature has been below 32°F continuously for a number of years. Half of Canada's land surface lies in the permafrost region-either in the continuous zone where the ground is frozen to a depth of hundreds of feet, or in t...
Gespeichert in:
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| Format: | Elektronisch E-Book |
| Sprache: | English |
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Toronto
University of Toronto Press
[2016]
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| Schriftenreihe: | Heritage
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| Schlagworte: | |
| Online-Zugang: | DE-1046 DE-859 DE-860 DE-739 DE-1043 DE-858 Volltext |
| Zusammenfassung: | Permafrost is the thermal condition of the earth's crust when its temperature has been below 32°F continuously for a number of years. Half of Canada's land surface lies in the permafrost region-either in the continuous zone where the ground is frozen to a depth of hundreds of feet, or in the discontinuous zone where permafrost is thinner, and there are areas of unfrozen ground.The existence of permafrost causes problems for the development of the northern regions of all countries extending into the Arctic. Mining operations are hindered by frozen ore which resists blasting and is difficult to thaw. Agriculture is restricted by the presence of permafrost near the ground surface which limits the soil available for plant growth. Engineering structures are also affected by the low temperatures. Ice layers give soil a rock-like structure with high strength. However heat transmitted by buildings often causes the ice to melt, and the resulting slurry is unable to support the structure. Many settlements in northern Canada have examples of structural damage or failure caused by permafrost. In the construction and maintenance of railways, buildings, water and sewage lines, dams, roads, bridges, and airfields, normal techniques must often be modified at additional cost because of permafrost.For the last twenty-five years scientific investigations and engineering projects have increased steadily in Canada's permafrost region, and it is now technically possible to build any structure or conduct any activity on the worst soils and under permafrost conditions.This comprehensive analysis of permafrost-its origin, definition, and occurrence, and the effect it has on industry and agriculture-will be invaluable to the growing number of people working in the north and to those interested in its development |
| Beschreibung: | Description based on online resource; title from PDF title page (publisher's Web site, viewed Jan. 06, 2016) |
| Beschreibung: | 1 online resource |
| ISBN: | 9781442632615 |
| DOI: | 10.3138/9781442632615 |
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| 520 | |a Permafrost is the thermal condition of the earth's crust when its temperature has been below 32°F continuously for a number of years. Half of Canada's land surface lies in the permafrost region-either in the continuous zone where the ground is frozen to a depth of hundreds of feet, or in the discontinuous zone where permafrost is thinner, and there are areas of unfrozen ground.The existence of permafrost causes problems for the development of the northern regions of all countries extending into the Arctic. Mining operations are hindered by frozen ore which resists blasting and is difficult to thaw. Agriculture is restricted by the presence of permafrost near the ground surface which limits the soil available for plant growth. Engineering structures are also affected by the low temperatures. Ice layers give soil a rock-like structure with high strength. However heat transmitted by buildings often causes the ice to melt, and the resulting slurry is unable to support the structure. Many settlements in northern Canada have examples of structural damage or failure caused by permafrost. In the construction and maintenance of railways, buildings, water and sewage lines, dams, roads, bridges, and airfields, normal techniques must often be modified at additional cost because of permafrost.For the last twenty-five years scientific investigations and engineering projects have increased steadily in Canada's permafrost region, and it is now technically possible to build any structure or conduct any activity on the worst soils and under permafrost conditions.This comprehensive analysis of permafrost-its origin, definition, and occurrence, and the effect it has on industry and agriculture-will be invaluable to the growing number of people working in the north and to those interested in its development | ||
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| spelling | Brown, Roger J.E. Verfasser aut Permafrost in Canada Roger J.E. Brown Toronto University of Toronto Press [2016] © 1970 1 online resource txt rdacontent c rdamedia cr rdacarrier Heritage Description based on online resource; title from PDF title page (publisher's Web site, viewed Jan. 06, 2016) Permafrost is the thermal condition of the earth's crust when its temperature has been below 32°F continuously for a number of years. Half of Canada's land surface lies in the permafrost region-either in the continuous zone where the ground is frozen to a depth of hundreds of feet, or in the discontinuous zone where permafrost is thinner, and there are areas of unfrozen ground.The existence of permafrost causes problems for the development of the northern regions of all countries extending into the Arctic. Mining operations are hindered by frozen ore which resists blasting and is difficult to thaw. Agriculture is restricted by the presence of permafrost near the ground surface which limits the soil available for plant growth. Engineering structures are also affected by the low temperatures. Ice layers give soil a rock-like structure with high strength. However heat transmitted by buildings often causes the ice to melt, and the resulting slurry is unable to support the structure. Many settlements in northern Canada have examples of structural damage or failure caused by permafrost. In the construction and maintenance of railways, buildings, water and sewage lines, dams, roads, bridges, and airfields, normal techniques must often be modified at additional cost because of permafrost.For the last twenty-five years scientific investigations and engineering projects have increased steadily in Canada's permafrost region, and it is now technically possible to build any structure or conduct any activity on the worst soils and under permafrost conditions.This comprehensive analysis of permafrost-its origin, definition, and occurrence, and the effect it has on industry and agriculture-will be invaluable to the growing number of people working in the north and to those interested in its development Civil engineering Canada Permafrost Canada Dauerfrostboden (DE-588)4129794-5 gnd rswk-swf Kanada (DE-588)4029456-0 gnd rswk-swf Kanada (DE-588)4029456-0 g Dauerfrostboden (DE-588)4129794-5 s 1\p DE-604 https://doi.org/10.3138/9781442632615 Verlag URL des Erstveröffentlichers Volltext 1\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk |
| spellingShingle | Brown, Roger J.E Permafrost in Canada Civil engineering Canada Permafrost Canada Dauerfrostboden (DE-588)4129794-5 gnd |
| subject_GND | (DE-588)4129794-5 (DE-588)4029456-0 |
| title | Permafrost in Canada |
| title_auth | Permafrost in Canada |
| title_exact_search | Permafrost in Canada |
| title_exact_search_txtP | Permafrost in Canada |
| title_full | Permafrost in Canada Roger J.E. Brown |
| title_fullStr | Permafrost in Canada Roger J.E. Brown |
| title_full_unstemmed | Permafrost in Canada Roger J.E. Brown |
| title_short | Permafrost in Canada |
| title_sort | permafrost in canada |
| topic | Civil engineering Canada Permafrost Canada Dauerfrostboden (DE-588)4129794-5 gnd |
| topic_facet | Civil engineering Canada Permafrost Canada Dauerfrostboden Kanada |
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