A stochastic conceptual-data-driven approach for improved hydrological simulations
Bibliographic record
Abstract
In a companion paper, Sikorska-Senoner and Quilty (2021) introduced the ensemble-based conceptual-data-driven approach (CDDA) for improving hydrological simulations. This approach consists of an ensemble of hydrological model (HM) simulations (generated via different parameter sets) whose residuals are ‘corrected’ by a data-driven model (one per HM parameter set), resulting in an improved ensemble simulation. Through a case study involving three Swiss catchments, it was demonstrated that CDDA generates significantly improved ensemble streamflow simulations when compared to the ensemble HM. In this follow-up study, a stochastic version of CDDA (SCDDA) is developed that, in addition to parameter uncertainty, accounts for input data, input variable selection, and model output uncertainty. Using several deterministic and probabilistic performance metrics, it is shown that SCDDA results in significantly more accurate and reliable ensemble-based streamflow simulations than the CDDA, ensemble and stochastic HMs, and a quantile regression-based approach, improving the mean interval score by 26–79%.
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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 | 0.004 | 0.008 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".