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INFLUENCE OF WATER TEMPERATURE AND FLOW ON THERMAL REGIME AROUND CULVERTS BUILT ON PERMAFROST.
Session: Embankments and Dams in Cold Regions / Remblais et barrages en régions nordiques
Loriane Périer, Université Laval_Civil Engineering Department_Centre d'Etudes Nordiques (Canada)
Guy Doré, Université Laval_Civil Engineering Department_Centre d'Etudes Nordiques (Canada)
C.R Burn, Carleton University_Geography and Environmental studies (Canada)
Embankment instability is frequently observed on the Alaska Highway in Yukon (Canada). Some of these instability problems are close to culverts. Free air and water circulation through the culvert creates a thermal disturbance to the surrounding soil. Two culverts near Beaver Creek were selected and instrumented to document these disturbances. Soil temperatures around culverts were recorded for an entire year while water temperatures and flow were recorded during both spring and summer. These data allow validation of mathematical relations established between the heat flux below the culvert and water temperature and flow. Some variations in flow and water temperature were applied to the mathematical model to quantify the influence of these two parameters on the heat flux transmitted from the culvert to the ground.
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