Numerical analysis of infiltration in a drained beach
Bibliographic record
Abstract
The beach drainage system (BDS) is a 'soft' engineering solution for coastal protection and management. It artificially increases beach permeability by inducing the groundwater table lowering and, consequently, it favours the infiltration of sea water inside the beach. The new hydrodynamic condition would produce a reduction of the offshore sediment transport and the settlement of the suspended load. The present work focuses on a numerical simulation of infiltration processes in drained conditions by using the HYDRUS-2D code. The groundwater flow through a partially saturated porous media is described by using the well-known Richard's equation. Numerical results are then compared with experimental ones obtained during an intensive experimental program performed at the Grosser Wellen-Kanal in Hannover on a BDS prototype. Moreover, different beach permeabilities (ranging from silt to coarse sand) and different drain altimetric positions are numerically simulated. These analyses allow to draw some first considerations about BDS design criteria. In particular, a 'limit drain depth', strictly related to beach permeability, is defined as the maximum depth that produces the maximum water table lowering and, as a consequence, the best system efficacy in drying the porous medium.
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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 | 0.001 | 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) | 0.000 | 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".