Hydro-environmental modeling of proposed Severn barrage, UK
Bibliographic record
Abstract
This paper presents details of a numerical modelling study of the Cardiff–Weston barrage proposal for Britain’s River Severn, previously studied by the Severn Tidal Power Group. The study focuses mainly on investigating the potential far-field and near-field hydro-environmental impacts of the barrage by using an integrated one- and two-dimensional numerical hydro-environmental model. The model was set up for a large domain, starting from the outer Bristol Channel close to Lundy Island to the River Severn tidal limit near Gloucester. Potential changes in water elevations, tidal currents and consequently flood risk, sediment concentrations and background bacterial levels were assessed by comparing the model predictions for both the existing conditions and those with the barrage included. The results of the study show that the barrage has the potential to reduce maximum water elevations and tidal currents in this highly dynamic estuary. As a result of changes in tidal currents, a corresponding reduction in suspended sediment levels will lead to a predicted reduction in the concentration levels of faecal bacteria, which are associated with sediment deposition/erosion and increased light penetration within the water column. An increase and change in the benthic biodiversity of the estuary is also predicted to occur.
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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 | 0.000 | 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 | 0.001 |
| 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".