ARCTIC Erosion Control Along Transportation Routes in Northern Climates
ABSTRACT. The widespread occurrence of permafrost in northern climates dictates the use of specialized measures to protect the terrain from adverse impacts associated with the construction of transportation facilities. Through the adoption of appropriate construction techniques and by providing prop...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.493.9804 http://pubs.aina.ucalgary.ca/arctic/Arctic34-2-147.pdf |
| Summary: | ABSTRACT. The widespread occurrence of permafrost in northern climates dictates the use of specialized measures to protect the terrain from adverse impacts associated with the construction of transportation facilities. Through the adoption of appropriate construction techniques and by providing proper drainage and erosion control facilities within the right-of-way, serious environmental degradation can be avoided. The most appropriate type of erosion control measure is selected according to local terrain and drainage conditions, including a Soil Erosion Code SEC). Erosion control begins with the provision of effective drainage across the right-of-way. Typical erosion control measures include the use of permanent linings such as granular blankets, rock riprap and gabions and temporary linings, such as plastic sheets and fiberglass rovings. Ditch checks, rock aprons, energy dissipators and siltation basins may be used to minimize erosion of exposed soils along the route and attendant siltation of streams. Cut slopes may be protected with insulation in ice-rich, fine-grained soils to ensure stability and prevent slump material from reaching the drainage system. Ultimately, long-term erosion protection along transportation comdors is provided through appropriate revegetation techniques, periodic surveillance and regular maintenance of drainage and erosion control facilities. RÉSUMÉ. La presence étendue de pergtlisol dans les rtgion du nord exige l’utilisation de gesures sptciales pour prottger le terrain des effets negatifs dûs à I’amknagement de l’infrastructure routibre. En adoptant des techniques de construction approprites et en assurant un drainage adkquat et un contrôle sur I’trosion le long du track, une degradation sCrieuse de l’environnement pourrait être tvitke. Le moyen les plus eificace pour contrôler I’trosion est choisi selon le terrain et les conditions du drainage de l’endroit, incluant un Code d’erosion du |
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