GEOG 2EI3 Lecture Notes - Lecture 8: Nonpoint Source Pollution, Hudson Bay Lowlands, Great Lakes Basin
25 Jan 2019
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Document Summary
Canada"s water: canada has 7% of the world"s renewable fresh water, the rest is ice (glaciers, permafrost, 12% of canada is covered by lakes and rivers, only 3% is in inhabited regions (ex. Hudson bay lowlands) this represents 98% of surface water for human use it is a habitat for waterfowl ex. Snow geese: groundwater is also important as it contributes to the recharge of lakes and rivers during dry periods. Storm water runoff industry is also important source of wastes runoff from urban areas either flows directly into water bodies from roads and other nonpoint sources, or can be channeled by storm water systems. Lakes: this was the first credible science to document the important contribution of non point sources to phosphorus loading, and was difficult to ignore, toxic substances such as pcbs were entering from diffuse sources, especially atmospheric deposition. In 1972, the governments of canada and the united states signed the great lakes.
