Ecohydrological analysis of a South African through-flow mire: Vankervelsvlei revisited
Why this work is in the frame
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Bibliographic record
Abstract
The Vankervelsvlei mire has one of the thickest peat deposits (more than 10 m) in South Africa, which started accumulating before 7000 BP. Two previous studies on the hydrological system that sustains the wetland reached inconsistent conclusions and disagreed strongly on the main sources of water feeding the wetland. One suggested that the wetland is fed by groundwater discharging from the underlying Table Mountain Group Aquifer, while the other proposed that the wetland is a perched system fed only by precipitation water. We tried to reconcile these discrepancies by measuring water table, hydraulic pressure and temperature in the peat profile and analysing the ionic composition of the groundwater. We also carried out radiocarbon dating (14C) of groundwater and surface water. Our results showed that both groundwater and surface water are relatively young (<50 years) and that Vankervelsvlei is hydrologically a through-flow system with (local) mineral-poor groundwater entering the mire, possibly from a catchment located in the dunes that lie to the south-east. The groundwater exits the mire at the opposite (northern) side. Our findings do not support either the hypothesis that the mire is fed by groundwater from a deep regional aquifer, or the notion that it is sustained exclusively by precipitation water.
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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 | 0.001 |
| 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) | 0.005 | 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 it