Effect of Freshwater Discharge From Estuary Dam on Residual Circulation in Bifurcated Channel
Bibliographic record
Abstract
Abstract The residual structure of the inner part of the Yeongsan River estuary has been reported to be a multi‐layer vertical structure, unlike the two‐layer vertical structure of a typical estuary, due to irregular freshwater discharge. The inner estuary has a main channel connected to the open sea, and a bifurcated channel system (sub‐channel) in its central part, which can affect the residual current. In this study, field observations of three‐dimensional velocity and salinity were conducted to understand the discharge effects on the residual current at bifurcated channels. The residual flows were estimated using least‐squares harmonic analysis. The relative contributions of advection acceleration and friction terms to nonlinear effects were evaluated using along‐channel momentum balance. In the absence of freshwater discharge, the flow patterns were dominated by tidal dynamics in the sub‐channel rather than the main channel, whereas most flow patterns during freshwater discharge were dominated by near‐surface strong velocity in the main channel. A multi‐layer vertical residual structure was observed during the non‐discharge period in the main channel, which was caused by the insertion of upstream residual flow from the sub‐channel. Nonlinear effects occurred at the bifurcation point of the two channels. During the non‐discharge period, the advection term was most dominant, whereas the vertical friction term was dominant during the discharge period. Moreover, the magnitude of the horizontal friction term was larger than that of the advection term. Therefore, freshwater discharge can lead to an increase in the friction term, which in turn can markedly affect the residual circulation.
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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 | 0.001 |
| 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".