On the surface, most of Canada’s lakes and rivers look pristine. But below the surface, many are facing essential challenges to their health. Why? To better understand the health of Canadian lakes and rivers, we must look beyond the site itself to the whole watershed.
Canada’s freshwater streams, rivers and lakes are inherently connected ecosystems. Driven by precipitation and gravity, the flow of water changes across seasons and location. Connected waterflows form watersheds. A watershed is the combined area drained by a body of water, including groundwater aquifers.
All human activity within a watershed that affects the quality of flowing water — including rain, snow, irrigation or groundwater — will have an impact upon all the water bodies in the system. Because of this, it is essential to monitor and regulate human activities in a lake’s watershed if its health and biodiversity are to be preserved.
