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The briefing assesses water quality and nutrient loading in the lower Winnipeg River basin (LWRB), identifying significant exceedances of total phosphorus and certain metals, particularly at the Pine Falls Forebay. It highlights that the Winnipeg River is a major nutrient contributor to Lake Winnipeg, with nutrient exports increasing downstream. The document also notes that climate projections suggest increased precipitation and runoff, which may further impact nutrient loading.

The study establishes a nutrient mass balance for Pelican Lake, Manitoba, finding that the lake acts as a net sink for phosphorus and a net source of nitrogen. External nutrient loads are strongly linked to surface hydrology and agricultural land use, with internal recycling from sediments contributing significantly to phosphorus levels. The findings suggest that remediation should focus on high-agricultural sub-catchments and the regulation of the Pembina River inlet dam.