{"query_echo":{"q":"","filters":{"analysis_type":["water quality assessment"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'water quality assessment' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=water+quality+assessment","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"iisd-002335","url":"https://climateinsightsdirectory.org/document/iisd-002335","title":"Water Quality and Nutrient Loading","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"briefing","language":"en","date_published":"2021-05","source_url":"https://www.iisd.org/system/files/2021-06/winnipeg-river-basin-sheet-4-water-quality-nutrient-loading.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"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.","ai_generated":true,"unit":"iisd-002335#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The lower Winnipeg River is well oxygenated across all seasons, with a mean dissolved oxygen concentration of approximately 10 mg/L, which exceeds the Canadian Council of Ministers of the Environment guidelines of 5.0 to 9.5 mg/L for warm- to cold-water biota.","ai_generated":true,"unit":"iisd-002335#insight-1","date_modified":"2026-10-23"},{"text":"Total phosphorus (TP) concentrations frequently exceed guidelines in the LWRB, with the highest percentage of exceedances occurring at the Pointe du Bois Forebay (85.3%) and Pine Falls Forebay (81%).","ai_generated":true,"unit":"iisd-002335#insight-2","date_modified":"2026-10-23"},{"text":"Aluminum, iron, and copper levels have exceeded protection of aquatic life (PAL) guidelines, with Pine Falls Forebay showing the most significant issues: 100% of samples exceeded aluminum guidelines and 58% exceeded copper guidelines.","ai_generated":true,"unit":"iisd-002335#insight-3","date_modified":"2026-10-23"},{"text":"The Winnipeg River is the second largest absolute contributor of nutrients to Lake Winnipeg, accounting for approximately 25% of total nitrogen (TN) and 15% of total phosphorus (TP) loads.","ai_generated":true,"unit":"iisd-002335#insight-4","date_modified":"2026-10-23"},{"text":"Nutrient exports increase downstream between Pointe du Bois and Pine Falls, with the reach between these two sites producing nutrient exports nearly three to four times higher than at each individual site.","ai_generated":true,"unit":"iisd-002335#insight-5","date_modified":"2026-10-23"},{"text":"Water volume is a primary driver of nutrient export from the Winnipeg River, with 97% of total nitrogen and 79% of total phosphorus loading variation attributed to river flows.","ai_generated":true,"unit":"iisd-002335#insight-6","date_modified":"2026-10-23"},{"text":"Climate projections for the 2050s suggest a 6.9% increase in mean annual precipitation and a 3.3% increase in runoff into the Winnipeg River basin, which could impact downstream nutrient loading.","ai_generated":true,"unit":"iisd-002335#insight-7","date_modified":"2026-10-23"}],"climate_tags":["water quality","precipitation","climate change"],"geography_discussed":["Lake Winnipeg","Ontario","Manitoba","Minnesota","United States"],"frame_perspective":[],"analysis_type":["environmental monitoring","water quality assessment"]},{"id":"iisd-003229","url":"https://climateinsightsdirectory.org/document/iisd-003229","title":"Manitoba Prairie Lakes: Mass balance budget for nutrient management at Pelican Lake, Manitoba","publisher":{"name":"International Institute for Sustainable Development","organization":"international-institute-for-sustainable-development"},"document_type":"report","language":"en","date_published":"2017-10","source_url":"https://www.iisd.org/system/files/publications/manitoba-prairie-lakes-mass-pelican-lake.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"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.","ai_generated":true,"unit":"iisd-003229#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Pelican Lake is a net sink for phosphorus, retaining approximately 70 per cent of external inputs, with the majority of this accumulation occurring in the water column.","ai_generated":true,"unit":"iisd-003229#insight-1","date_modified":"2026-10-23"},{"text":"The lake acts as a net source of nitrogen to the surrounding environment, including groundwater, largely due to biological processes such as N2 fixation driven by high phosphorus concentrations.","ai_generated":true,"unit":"iisd-003229#insight-2","date_modified":"2026-10-23"},{"text":"Internal phosphorus recycling from lake sediments and macrophytes contributed approximately 10 per cent of external phosphorus loads, with sediments acting as a net source of P to the water column during the study period.","ai_generated":true,"unit":"iisd-003229#insight-3","date_modified":"2026-10-23"},{"text":"External nutrient fluxes are strongly tied to surface hydrology, indicating that climate variability and increased rainfall have significantly contributed to nutrient inputs in recent years.","ai_generated":true,"unit":"iisd-003229#insight-4","date_modified":"2026-10-23"},{"text":"Nutrient loading is not primarily determined by catchment size but by land use; the highest nutrient loads originate from the sub-catchment with the highest percentage of agricultural area (PL05), rather than the largest catchment by area.","ai_generated":true,"unit":"iisd-003229#insight-5","date_modified":"2026-10-23"},{"text":"A significant portion of phosphorus loading occurs during spring runoff events, specifically when the PL08A-inlet dam is opened to divert water from the Pembina River; approximately 45 per cent of the phosphorus load during the study period was delivered during the March dam opening.","ai_generated":true,"unit":"iisd-003229#insight-6","date_modified":"2026-10-23"},{"text":"Groundwater serves as a major output for nitrogen, with 103,007 kg of total nitrogen moving from the lake to aquifers, accounting for 93 per cent of the total outflow nitrogen load.","ai_generated":true,"unit":"iisd-003229#insight-7","date_modified":"2026-10-23"}],"climate_tags":["climate variability","water quality"],"geography_discussed":["Pembina River","Lake Winnipeg basin"],"frame_perspective":[],"analysis_type":["mass balance budget","hydrological modelling","water quality assessment"]}]}