TORONTO, Monday, June 12, 2017 - Without action, the supply of fresh water in Iqaluit will begin to dwindle by 2024 due to climate change and increased demand, research led by York University has found.
"Extreme climates make the management of fresh water difficult, but add climate change to the mix, along with too few financial and human resources, and northern cities, such as Iqaluit could run out of fresh water," said Andrew Medeiros of York U who led the research.
Even if population growth remains stagnant, current climate change projections show demand will outstrip supply for freshwater in the Arctic community, said Medeiros, a research fellow for York University's Robarts Centre for Canadian Studies. However, as Iqaluit is a growing city, the pressure on water resources will only increase.
So far, various methods of increasing freshwater supply only helped to extend it for a couple of years. Medeiros and his team used novel hydrologic modelling and climate forecasting methods looking ahead 20 years. Their forecasting included the possibility of diverting water from the nearby Apex River, something the city plans to do to help solve the water shortage problem.
The researchers found the primary source of renewal for the Apex River is rainwater with little evaporation, which means it could be used as an alternative source of freshwater on a seasonal basis. However, long term it would not solve the issue as it would only extend the water supply by two years even if only 10 per cent is diverted as recommended by the Department of Fisheries and Oceans Canada.
"The availability, quality and security of freshwater in the Canadian Arctic an increasingly pressing issue," said Medeiros. The research highlights the need to address end-of-winter water shortages, due to climate change, with over winter replenishment. Otherwise consumption restrictions would be necessary.
As it is now, many northern Canadian communities rely on a single, small shallow lake reservoir or seasonal replenishment systems for their freshwater that are not always sustainable, especially as the climate warms in the Arctic. Temperatures in the Arctic have increased close to twice the global rate and are expected to further increase. "Arctic lakes are especially vulnerable to climate change," says Medeiros.
His team's forecasting and modelling has provided municipal planners and engineers in Iqaluit with information on how climate will affect their area's freshwater supply, and how long current sources of water are likely to last, so that they can better plan for the future. "Hydrologic monitoring tools for freshwater municipal planning in the Arctic: The case of Iqaluit, Nunavut, Canada" is published today in the journal of Environmental Science and Pollution Research.
Funding organizations for the research include the Natural Sciences & Engineering Research Council of Canada and the Northern Scientific Training Program.
York University is known for championing new ways of thinking that drive teaching and research excellence. Our students receive the education they need to create big ideas that make an impact on the world. Meaningful and sometimes unexpected careers result from cross-discipline programming, innovative course design and diverse experiential learning opportunities. York students and graduates push limits, achieve goals and find solutions to the world's most pressing social challenges, empowered by a strong community that opens minds. York U is an internationally recognized research university - our 11 faculties and 26 research centres have partnerships with 200+ leading universities worldwide. Located in Toronto, York is the third largest university in Canada, with a strong community of 53,000 students, 7,000 faculty and administrative staff, and more than 295,000 alumni. York U's fully bilingual Glendon campus is home to Southern Ontario's Centre of Excellence for French Language and Bilingual Postsecondary Education.
Environmental Science and Pollution Research