Atmospheric control of radon emissions from a waste rock dump
Bibliographic record
Abstract
At the former Schlema-Alberoda mining site, located in the south-east of Germany, waste rock dump 38neu was built along a natural slope on the edge of a valley. The dump is 750 m wide, with a maximum thickness of 30 m and a total height of 100 m. Dump remediation involved surface re-sloping and placement of a 1 m thick low-permeability soil cover. A characterisation aimed to verify the soil cover efficiency: its air permeability, radon concentrations under the cover and radon fluxes, as well as differential air pressures across the soil cover. In summer, relatively high radon concentrations and fluxes were found to occur across the cover in the lower slope of the dump. Differential pressures indicate that gas flow is upwards in the dump below the 9·5°C mean atmospheric temperature and downwards otherwise. A numerical model was developed to explain the relation between dump airflow and atmospheric conditions. The results indicate that airflow is controlled by dump gas buoyancy relative to atmospheric air. Preferential gas entry and exit occur across the dump’s lower slope, where differential pressures are highest, explaining the higher radon fluxes observed near the base of the dump under high atmospheric temperatures.
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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 | 0.000 |
| 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) | 0.001 | 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".