212 4TH CAN. PERMAFROST CONF. (1982) Management of groundwater discharge for the solution of icing problems in the Yukon
Icings fed by perennial discharge of groundwater cause traffic and maintenance problems at several points along the Alaska Highway in the Yukon. At the site investigated in detail (km 1817.5), slightly mineralized groundwater is being discharged at a rate of up to 9.4 m3 per hour. Isotope analyses i...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.543.8289 http://pubs.aina.ucalgary.ca/cpc/CPC4-212.pdf |
| Summary: | Icings fed by perennial discharge of groundwater cause traffic and maintenance problems at several points along the Alaska Highway in the Yukon. At the site investigated in detail (km 1817.5), slightly mineralized groundwater is being discharged at a rate of up to 9.4 m3 per hour. Isotope analyses indicate that the discharge is derived from recent precipitation. During the 19791 1980 winter, icing extended 240 m upstream from the highway, with a maximum thickness of 2.55 m and a total volume of about 14,000 m3; icing covered the highway on several occasions. Maximum predicted icing volume for this site is 33,000 m3, which would increase average thick-ness by 1.2 m and extend the icing area to about 350 m upstream from the highway. Annual expen-ditures for icing control at this and other icing sites can be reduced considerably (or eliminated) by improved management of groundwater discharge, through installation of subdrains, through provision of "icing-storage " areas, or some combination of these. L'englacement engendrt par I'koulement continu de I'eau souterraine perturbe le trafic et pose des problemes d'entretien en divers points le long de la route de I'Alaska, dans le Yukon. Au point etudie en detail (kilometre 1817,50), le dibit de I'eau souterraine, lkgerement mineralisee, atteint jusqu'a 9,40 m3 par heure. Des analyses isotopiques montrent que I'eau rksurgente provient de |
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