When Does Water-Quality Prediction Generalize? An Observation–Process–Deployment Framework for Large-Sample River Modelling: code, frozen manifests and reproducibility materials

An Observation–Process–Deployment Framework for Large-Sample River Modelling”. The release contains the staged audit and modelling code, frozen validation/adaptation manifests, robustness and uncertainty analyses, manuscript-facing result tables, publication figures, final experiment gates, and the H3 environmental deployment distance audit.

Raw Caravan-Qual data are not redistributed; users should obtain Caravan-Qual v1.1 from DOI 10.5281/zenodo.21337532. The repository evaluates random, temporal, unseen-station, unseen-catchment and held-out-climate-domain validation across five river-water-quality constituents and quantifies progressive local adaptation.</p>