Hyporheic exchange inside a flat gravel bed, flume experiments and modelling.
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The aim of this research is to gain more understanding on the parameters that affect hyporheic\nexchange. Hyporheic exchange is a diverse process, in which many different parameters\naffect the hyporheic flow paths and residence times. Literature research has showed that\nhyporheic exchange is in most cases mainly dependant on the channel morphology, the\nsediment characteristics of hyporheic zone and the flow velocity of the stream. Many other\nfactors also affect hyporheic exchange, such as lateral groundwater inflows and natural\nobstructions. The diversity of all of these factors makes it hard to predict hyporheic exchange\nthrough models. The advective pumping model has shown that it is able to predict exchange\ndue to bedforms well. This contributed to different studies, which allowed the prediction of\nvertical hyporheic exchange fluxes. But lateral hyporheic exchange fluxes still can not be\npredicted.\nFlume experiments were conducted at the Quesnel River Research Centre (QRRC) in Likely,\nBC, Canada, to provide more insight on the pattern of hyporheic exchange. EC-meters were\nplaced inside a flat gravel bed with a d50 of 25.28 mm for the top layer, and 22.90 mm for the\nbottom layer. Experiments were performed with different flow velocities and water levels.\nThese experiments showed the irregularities in hyporheic exchange in a heterogeneous gravel\nbed and provided some insight in the pattern of hyporheic exchange. To further investigate\nsome of the unknown variables, an advection-diffusion model was made. By means of this\nmodel, the effects of variations in flow velocity and water level were studied.\nThe following conclusions were made:\n· An increase in flow velocity results in smaller residence times, and an increase in\nwater level results in larger residence times.\n· Water level has a relatively large impact on the reach of the hyporheic exchange into a\nflat gravel bed.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 it