The Hydraulic Geometry of Peace River
Bibliographic record
Abstract
Abstract: Hydraulic geometry at-a-station is explored using the history of stream gauging at six alluvial sections along Peace River. At long-established stations at Taylor and Peace Point, comparisons are made between ice cover and open water periods and at these stations, Dunvegan and Fort Vermilion comparisons are made between pre- and post-regulation periods. Additional information is available for stations at Carcajou (pre-regulation) and Peace River at Alces River (post-regulation). Periods of observation vary from 7 to 64 years and numbers of gaugings from 29 to 430 (of which 255 are for ice conditions). The most striking change is the increase in sensitivity of the width variable in the post-regulation period, a consequence of lower flows after regulation in wide, flat-bottomed channels. This reflects passive adjustment to regulated flows within the preexisting channel. At some stations the 1996 drawdown flood led to incremental dynamic changes in geometry. Some stations exhibit anomalously high rates of adjustment of velocity. The downstream hydraulic geometry is reconstructed by comparing flows of equal frequency at the gauging stations. Adjustment does not follow the general regime relations for Alberta gravel- and sand-bed rivers but, again, reflects passive change. Channels remain wider and shallower than expected. This may be due to slow progradation of vegetation, but ice effects to maintain a wider channel cannot be discounted in the lower river. Peace River sections approximate a general flow resistance relation for channels dominated by grain resistance, except at Taylor and Fort Vermilion, where a developing bar and sandy bedforms, respectively, offer additional resistance. Discriminant functions for channel pattern indicate that the river should dominantly be single thread, as observed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".