Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1029/2024WR039625 |
Lizenz  |
|
| Titel (primär) | Evaluating Richards equation and infiltration capacity approaches in mesoscale hydrologic modelling |
| Autor | Kholis, A.; Kalbacher, T.; Rakovec, O.
; Boeing, F.
; Cuntz, M.; Samaniego, L.
|
| Quelle | Water Resources Research |
| Erscheinungsjahr | 2025 |
| Department | CHS; ENVINF |
| Band/Volume | 61 |
| Heft | 8 |
| Seite von | e2024WR039625 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Daten-/Softwarelinks | http://doi.org/10.5067/MODIS/MYD15A2H.006 https://doi.org/10.34731/x9s3-kr48 https://doi.org/10.48758/ufz.15298 https://doi.pangaea.de/10.1594/PANGAEA.788537 |
| Supplements | https://agupubs.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1029%2F2024WR039625&file=2024WR039625-sup-0001-Supporting+Information+SI-S01.pdf |
| Keywords | soil infiltration; parameter regionalization; mHM model; soil moisture; global-scale modeling |
| Abstract | This study compares two widely used approaches for modeling soil moisture (SM) infiltration in mesoscale hydrology: the one-dimensional Richards equation (1D RE), which governs vertical flux exchange but is nonlinear and computationally demanding, and the infiltration capacity (IC) scheme, which is simpler and restricts SM movement to the downward direction. A major challenge in implementing the RE is the estimation of effective parameters at the typical model resolution (hundreds to thousands of meters), as the equation was originally developed for finer scales. To address this, we conducted experiments using the mHM model with Multiscale Parameter Regionalization (MPR) to parameterize both RE and IC approaches. The RE parameterization relied on three distinct pedo-transfer functions (PTFs). Parameters were estimated across 201 basins in Germany and evaluated using streamflow data at multiple spatial resolutions, as well as in situ SM observations from 46 sites (0–25 cm) and 42 sites (25–60 cm and 0–60 cm). Results show that both mHM-IC and all mHM-RE variants perform comparably in streamflow prediction. The use of MPR enables the spatial transferability of PTF-based parameters. Owing to its two-way flux capability, the mHM-RE variant better captures SM dynamics, particularly in deeper soil layers. Although the IC scheme often leads to saturation at depth, it still provides strong performance in capturing SM anomalies. Overall, the study demonstrates that with appropriate parameterization, the RE approach can yield transferable parameters and robust simulations of both streamflow and soil moisture states. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31107 |
| Kholis, A., Kalbacher, T., Rakovec, O., Boeing, F., Cuntz, M., Samaniego, L. (2025): Evaluating Richards equation and infiltration capacity approaches in mesoscale hydrologic modelling Water Resour. Res. 61 (8), e2024WR039625 10.1029/2024WR039625 |
|