Decadal and seasonal water quality trends downstream of urban and rural areas in southern Alberta rivers
Bibliographic record
Abstract
Seasonal and long-term water quality changes downstream of urban and agricultural land uses were compared using chloride, fecal coliform (FC), Escherichia coli and discharge from five long-term river monitoring sites in the Bow and Oldman watersheds in southern Alberta. Water quality data from up- and downstream locations of two major urban centers (Calgary and Lethbridge) and single sampling locations downstream of three agricultural sites were evaluated. Significant monotonic, decadal increases in chloride mass fluxes observed downstream of both urban areas were consistent with increasing chloride fluxes in wastewater effluent from increasing populations. Significant step function decreases in FC concentrations downstream of the two urban centers (89% at Calgary, 70% at Lethbridge) observed after UV disinfection were introduced at upstream wastewater treatment plants, suggesting wastewater disinfection improved river water quality. Significant monotonic decreases in pathogen indicators were found at only one of the three agricultural sampling locations. Seasonal variations in indicator bacteria were consistent with a constant source at the urban downstream sites, while variable seasonal loading patterns at the agricultural sites were attributed to seasonally changing land use. This suggests that the urban centers are more significantly mitigating pathogens in rivers than rural areas despite their significant growth.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.011 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".