Natural pore pressure fluctuations as an indicator of shallow aquitard continuity
Why this work is in the frame
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Bibliographic record
Abstract
The natural pore pressure response of a shallow aquifer/aquitard system can be used to assess aquitard continuity. This is the first paper to examine aquitard continuity at the field scale based on the barometric head response function (BHRF) obtained from multiple-regression analysis. The pore pressure measurements made during winter provided more representative BHRFs for the bounding aquifers and the aquitard. Distinct BHRFs were found for the shallow unconfined aquifer, clay aquitard and confined aquifer. This implies how the clay aquitard isolates the underlying confined aquifer from the shallow unconfined aquifer. It is found that the BHRFs for intact clay formation are delayed and differ from those for the fractured zone and confined aquifer. For the fractured zone, the observed BHRF quickly reached equilibrium. The BHRFs for intact clay and fractured zone equilibrated at high BHRF values. For the confined aquifer, the BHRF was low and constant. Numerical simulations provided a hydraulic conductivity below 1 × 10 −8 m/s for the observed BHRF. Fast Fourier transform showed that the pore pressure components with a period smaller than one cycle per day were fully explained by barometric pressure fluctuations. Furthermore, the response of a deep piezometer to the moisture loadings provided an opportunity to estimate that the annual snowfall, for the study area, lost 25–35% of its weight.
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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) | 0.003 | 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 it