Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.5194/hess-30-5749-2026 |
Lizenz  |
|
| Titel (primär) | Explicit representation and calibration of different landscape units for a robust catchment DOC export model |
| Autor | Nguyen, V.T.
; Kumar, R.
; Ledesma, J.L.J.
; Ebeling, P.; Fleckenstein, J.H.; Musolff, A. |
| Quelle | Hydrology and Earth System Sciences |
| Erscheinungsjahr | 2026 |
| Department | CHS; HDG |
| Band/Volume | 30 |
| Heft | 17 |
| Seite von | 5749 |
| Seite bis | 5768 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Daten-/Softwarelinks | https://doi.org/10.5281/zenodo.22273576 |
| Supplements | Supplement 1 |
| Abstract | Elevated
dissolved organic carbon (DOC) concentrations are a major concern for
ecosystems and drinking water supply. Data-driven studies revealed
variable functioning of different landscape units (upland, riparian
zone, and groundwater) in catchment DOC mobilization and export.
However, lumped and landscape-explicit (separating upland and riparian
zone) model structures are generally calibrated to stream DOC
concentrations, while the internal DOC dynamics often do not receive
sufficient attention. Here, we developed a flexible model with a lumped
and landscape-explicit structure for four headwater catchments in the
Harz Mountains, Germany. We evaluated these models under a baseline
calibration (only against stream DOC concentration) and a constrained
calibration (using stream DOC and internal DOC concentrations). Under
the baseline calibration, both model structures reproduced stream DOC
dynamics with acceptable performance in some catchments (Kling–Gupta
efficiency of behavioural simulations>0.6),
but with unrealistically high groundwater DOC. By contrast, the
constrained calibration reduces the KGE for stream DOC concentrations
but produces internal DOC dynamics consistent with the imposed
observational and process-based constraints. Additionally, the
landscape-explicit model structure is more robust than the lumped model
structure under changing boundary conditions. Our study thus shows that
robust catchment DOC modelling requires not only explicit representation
of different landscape units, but also calibration constraints based on
DOC concentrations within those units. |
| Nguyen, V.T., Kumar, R., Ledesma, J.L.J., Ebeling, P., Fleckenstein, J.H., Musolff, A. (2026): Explicit representation and calibration of different landscape units for a robust catchment DOC export model Hydrol. Earth Syst. Sci. 30 (17), 5749 - 5768 10.5194/hess-30-5749-2026 |
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