Sediment-associated contaminant transport and storage dynamics in the Quesnel River from the Mount Polley Mine disaster
Bibliographic record
Abstract
In August 2014, the tailings storage facility of the Mount Polley copper-gold mine was breached releasing ~25 million m3 of tailings water and solids into Polley Lake and Hazeltine Creek, which scoured local overburden (1.2 million m3), and deposited these materials in Quesnel Lake. This study examined temporal and spatial movements of sediment-associated elements in Quesnel River, downstream of the lake, between August 2014 and August 2015. Suspended river sediment was collected using active and passive samplers (a continuous-flow centrifuge and time-integrated samplers), while discrete bed sediment was collected using a re-suspension technique. Results indicated elevated trace element levels, especially copper, with significant differences between element concentrations at the upstream site, closer to the breach, compared to downstream sites. Contamination indices and comparison to sediment quality guidelines indicated contamination was present in the river and varied seasonally predominantly driven by Quesnel Lake’s autumnal cooling and overturns.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".