Phosphorus behaviour in a river during periods of drought and rain
Bibliographic record
Abstract
The behaviour of phosphorus forms and loads under conditions of drought and rainfall and based on real measurements was studied in the Timbú River Basin, an important water source in the metropolitan region of Curitiba, Paraná State, Brazil. Quantitative and qualitative chronosequential analyses were performed in different points of the river during a period of drought and every 5–10 min before, during and after rainfall in the basin. The main results showed that the phosphorus load at the river mouth during drought periods was 2·8 kg/d, five times lower than the normal flow of 8·8 kg/d. At its peak during medium rainfall, the load reached 175·3 kg/d, highlighting the significant influence of diffuse loads in the catchment area. The parameters total phosphorus and reactive phosphorus differed based on river compartments and land uses, mainly urban, agricultural and preserved areas. Therefore, basin action plans must consider varying weather conditions, including both drought and rainy periods, and implement long-term monitoring programmes.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.000 | 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 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".