Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Bauser, Hannes [VerfasserIn]  |
| Jaumann, Stefan [VerfasserIn]  |
| Berg, Daniel [VerfasserIn]  |
| Roth, Kurt [VerfasserIn]  |
Titel: | EnKF with closed-eye period - towards a consistent aggregation of information in soil hydrology |
Verf.angabe: | Hannes H. Bauser, Stefan Jaumann, Daniel Berg, and Kurt Roth |
E-Jahr: | 2016 |
Jahr: | 19 December 2016 |
Umfang: | 16 S. |
Fussnoten: | Gesehen am 04.05.2020 |
Titel Quelle: | Enthalten in: Hydrology and earth system sciences |
Ort Quelle: | Katlenburg-Lindau : EGU, 1997 |
Jahr Quelle: | 2016 |
Band/Heft Quelle: | 20(2016), 12, Seite 4999-5014 |
ISSN Quelle: | 1607-7938 |
Abstract: | The representation of soil water movement exposes uncertainties in all model components. We assess the key uncertainties for the specific hydraulic situation of a 1-D soil profile with TDR (time domain reflectometry)-measured water contents. The uncertainties addressed are initial condition, soil hydraulic parameters, small-scale heterogeneity, upper boundary condition, and the local equilibrium assumption by the Richards equation. We employ an ensemble Kalman filter (EnKF) with an augmented state to represent and estimate all key uncertainties, except for the intermittent violation of the local equilibrium assumption. For the latter, we introduce a closed-eye EnKF to bridge the gap. Due to an iterative approach, the EnKF was capable of estimating soil parameters, Miller scaling factors and upper boundary condition based on TDR measurements during a single rain event. The introduced closed-eye period ensured constant parameters, suggesting that they resemble the believed true material properties. This closed-eye period improves predictions during periods when the local equilibrium assumption is met, but requires a description of the dynamics during local nonequilibrium phases to be able to predict them. Such a description remains an open challenge. Finally, for the given representation our results show the necessity of including smallscale heterogeneity. A simplified representation with Miller scaling already yielded a satisfactory description. |
DOI: | doi:10.5194/hess-20-4999-2016 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.5194/hess-20-4999-2016 |
| Volltext: https://www.hydrol-earth-syst-sci.net/20/4999/2016/ |
| DOI: https://doi.org/10.5194/hess-20-4999-2016 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1697008208 |
Verknüpfungen: | → Zeitschrift |
EnKF with closed-eye period - towards a consistent aggregation of information in soil hydrology / Bauser, Hannes [VerfasserIn]; 19 December 2016 (Online-Ressource)
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