Human Impact on the Sedimentary Regime of the Fraser River Delta, Canada
Bibliographic record
Abstract
@. ABSTRACT I BARRIE, J.V. and CURRIE, R.G., 2000. Human impact on the sedimentary regime of the Fraser River Delta, Canada. Journal of Coastal Research, 16(3), 747-755. West Palm Beach (Florida), ISSN 0749-0208. The Fraser River Delta is a Holocene, river dominated feature in a macrotidal environment, built into the deep (>300 m) waters of the Strait of Georgia on Canada's Pacific coast. The delta has been modified to provide port facilities and a navigable channel for the city of Vancouver. Prior to the confinement of the Fraser River to its present channels, during the early part of this century, the distributary river channels regularly switched and migrated across the entire delta front. The annual river load (approximately 17.3 X 106 tonnes) is 65% silt and clay, and 35% sand. Today, most of the sand is removed from the system by dredging and the mud is transported in a plume past the intertidal estuary and northwards into the basin by the dominant flood tidal flow. Three causeways that cross the intertidal zone to the delta foreslope act as barriers to the dominant northward sediment transport causing estuarine and localized seabed erosion. The presence of the causeways results in tidal flow separation with clockwise back eddies forming behind the structures focusing the tidal energy to the intertidal zone. On the delta foreslope, off the southern causeways, an eroded submarine distributary channel subaqueous fan complex has been exposed by enhanced tidal flows that scour the seabed and form northward migrating subaqueous dunes increasing the delta slope and, consequently, the risk of slope failure.
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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 | 0.002 | 0.004 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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 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".