Observed thermal pollution and post-development simulations of low-temperature geothermal systems in Winnipeg, Canada |
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| Authors: | Grant Ferguson Allan D Woodbury |
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| Institution: | (1) Department of Earth Sciences, St. Francis Xavier University, B2G 2V5 Antigonish, Nova Scotia, Canada;(2) Department of Civil Engineering, University of Manitoba, 246 Engineering Building, 15 Gillson St., R3T 5V6 Winnipeg, Manitoba, Canada |
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| Abstract: | Two issues arise in the long-term use of groundwater for thermal purposes: (1) the sustainability of an individual system; and (2) the effect of neighbouring systems on each other. Both of these effects are observed in an area of the Carbonate Rock Aquifer beneath Winnipeg in Manitoba, Canada, where groundwater has been exploited in thermal applications since 1965. In this area, there are four systems that utilize groundwater for cooling purposes that are closely spaced. The current temperatures observed in this area of the Carbonate Rock Aquifer and the results of the numerical modeling conducted in this study confirm that in each system, temperatures at the production well have risen as a result of breakthrough of injected water. The results of numerical modeling also indicate that interference effects are present in three of the four systems examined in this study. The influence of these systems on each other implies that these systems have a spacing that is smaller than the optimum spacing for such systems, and indicates that there is a limit to the density of development that can occur in a given aquifer.Contaminación termal y simulaciones post-desarrollo de sistemas geotermales de baja temperatura en Winnipeg, Canadá |
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| Keywords: | Groundwater-source cooling Heat transport Injection wells Sustainability Numerical modeling |
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