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During the record-breaking 2018 fire season, the typically clear waters of Cameron Falls in Waterton Lakes National Park in southern Alberta flowed black. But it had nothing to do with the extensive fires that torched much of British Columbia and a small part of Waterton.

The carbon came from the remnants of another wildfire that had raced 26 km — from one end of the park to the other — in less than eight hours the year before. Heavy rain from a violent thunderstorm in July 2018 flushed the ash, soot and blackened debris that lay on the forest floor into the Cameron River.

Waterton officials, concerned about the impact of the fire on drinking water and the river’s aquatic species, brought in to monitor water quality in the park over the coming years.

I was fortunate to spend some time in the field with Silins in Waterton and in the Castle Crown Wilderness, where the water quality has still not fully recovered from .

What I learned from those trips and from several others that I recently made to fire-scarred watersheds in British Columbia, Alberta, California, Montana and elsewhere is that wildfire’s impact on water quality is just as sobering as its impact on public safety, air quality and the forest industry.

What we don’t know — and what we’re not prepared for — is frightening and underscores yet again the need for a multi-disciplinary national wildfire strategy that involves the federal government, the provinces and municipalities, universities, First Nations and the business community.

Charred watersheds

Fire often removes a lot of trees in a watershed. The soils in these denuded landscapes can bake in the . Some spring-fed streams stop flowing, and the soils can become impenetrable to water.

Fire can . As they condense, they form an impervious layer just below the surface. Hydrophobic is the word that geologists use to describe such soils.

Without trees, vegetation and a stable soil structure to absorb the heavy rains that may follow a fire, tonnes of ash, debris, heavy metals, sediments and nutrients are flushed through the watershed.

Periodic flushes of this wildfire-generated material can overwhelm fish and aquatic life. . It may be happening now to some salmon spawning streams in B.C.

These flushes of wildfire-generated carbon, sediment and nutrients can also overwhelm water treatment facilities.

That’s what . The town has to decrease the risks associated with post-fire algal blooms that are more likely after severe wildfire.

According to who works with Silins on various fire-related research projects, including one related to Fort McMurray, these blooms have the potential to lead to service disruptions, especially if they produce toxins.

Water alert

It could have been a lot worse.

In the past 16 years, .

The 300,000 people living in Fort Collins were prohibited from drawing on their traditional water supply for more than three months. Denver spent US$26 million hiring 60 scientists and planting 175,000 trees to deal with its water problem. Canberra was forced to build a new water treatment plant.

This should be a wake-up call for the federal government, the provinces and municipalities, which are responsible for the quality of the water in national and provincial parks, towns and cities and on First Nations reserves.

Most of the country . Some provinces, such as British Columbia, . In many places, the quality of that water is already being degraded by drought, pollution, climate change, agriculture and urban development.

Groundwater may be keeping the surface water cool and clean in places where burned watersheds are now more exposed to the warming effects of the sun, such as in Lost Creek and, hopefully, in Waterton National Park. But we don’t know how long this may last, because we have not adequately mapped out, evaluated and diligently protected our underground aquifers. Instead, .

Rivers under stress

Wildfire isn’t all bad for watersheds. It can add food to nutrient-deprived rivers and lakes, and .

But the prospects of more fires burning bigger and more often is bound to further degrade water flowing in and out of our forests. Investing in water treatment facilities and training people to run them, as the , is only part of the answer.

It’s time to connect the dots. There are 25 major watersheds in Canada. We know little about their flow, the fish and aquatic life that dwell in them because there is, as , no centralized or systematic method in place to monitor them.

What we do know about highly stressed rivers is that they are losing water too fast. The rivers in the South Saskatchewan watershed, for example, won’t have enough water in them by 2030 to supply the needs for more than half of the communities in the region without significant conservation measures. We are increasingly seeing the threat of serious water shortages in many other parts of the country.

How can bad could it get?

Sometime soon, we’re going to have . I described the impacts in .

At the height of the drought, thirty-two massive dust storms swept across the prairies. Forest fires ignited at five times the ten-year average. Thousands of prairie ponds (or sloughs as they are called in the west) dried up, and tens of thousands of waterfowl were unable to find suitable wetlands in which to nest.

During the summer of 2001, irrigation districts in southern Alberta were literally put on rations. On average, they were allocated only 60 per cent of the water they traditionally received.

The 2001 and 2002 droughts dried up virtually every part of the country. Vancouver recorded its second-lowest amount of rainfall and snowfall since its earliest days of record-keeping in 1900, and Canada’s west coast hit a 101-year low. Atlantic Canada had its third-driest summer ever.

For the first time in a quarter century, . Over 41,000 jobs were lost. The GDP took a $5.8 billion hit.

David Phillips, Canada’s most famous climatologist, ,” because the weather that produced it was almost tropical.

When another drought like that settles in, there will be less water in our watersheds, and quite possibly more intense fires because there will be higher temperatures brought on by climate change.

The Natural Sciences and Engineering Research Council (NSERC) recently recognized the challenges that lay ahead when it announced funding for the “,” which connects 24 researchers and nine universities across Canada to focus on technologies that will enhance water protections. What NSERC has not done thus far is make wildfire science a research priority.

There is a road map to the future that is slowly working its way through the bureaucratic process in the federal government. While it is short on details, the blueprint makes the business case for investing more in wildfire science.

The take-home message for the decision makers who will consider it, if it climbs far enough up the ladder, is that we are not prepared for the future of wildfire in this country. Unless something significant is done soon, we will see more evacuations, more denuded watersheds and more rivers running black.

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Edward Struzik is a fellow at the Queen's Institute for Energy and Environmental Policy, School of Policy Studies. He is the author of

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