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Finding behavioral parameterization for a 1-D water balance model by multi-criteria evaluation

  • Evapotranspiration is often estimated by numerical simulation. However, to produce accurate simulations, these models usually require on-site measurements for parameterization or calibration. We have to make sure that the model realistically reproduces both, the temporal patterns of soil moisture and evapotranspiration. In this study, we combine three sources of information: (i) measurements of sap velocities; (ii) soil moisture; and (iii) expert knowledge on local runoff generation and water balance to define constraints for a “behavioral” forest stand water balance model. Aiming for a behavioral model, we adjusted soil moisture at saturation, bulk resistance parameters and the parameters of the water retention curve (WRC). We found that the shape of the WRC influences substantially the behavior of the simulation model. Here, only one model realization could be referred to as “behavioral”. All other realizations failed for a least one of our evaluation criteria: Not only transpiration and soil moisture are simulated consistently with our observations, but also total water balance and runoff generation processes. The introduction of a multi-criteria evaluation scheme for the detection of unrealistic outputs made it possible to identify a well performing parameter set. Our findings indicate that measurement of different fluxes and state variables instead of just one and expert knowledge concerning runoff generation facilitate the parameterization of a hydrological model.
Metadaten
Author:Markus C. Casper, Hadis Mohajerani, Sibylle K. Hassler, Tobias Herdel, Theresa Blume
URN:urn:nbn:de:hbz:385-1-12424
DOI:https://doi.org/10.2478/johh-2019-0005
Parent Title (English):Journal of Hydrology and Hydromechanics
Publisher:Sciendo
Place of publication:Warschau
Document Type:Article
Language:English
Date of completion:2019/09/26
Date of publication:2019/06/26
Publishing institution:Universität Trier
Contributing corporation:The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG)
Release Date:2019/09/26
Tag:Behavioral model; Forest evapotranspiration; Soil parameterization; Water balance simulation
GND Keyword:Bodenwasser; Einzugsgebiet; Evapotranspiration; Modellierung; Wald; Wasserbilanz
Issue / no.:Band 67, Heft 3
First page:213
Last page:224
Institutes:Fachbereich 6
Dewey Decimal Classification:9 Geschichte und Geografie / 90 Geschichte / 900 Geschichte und Geografie
Licence (German):License LogoCC BY-NC-ND 3.0: Creative-Commons-Lizenz 3.0 International

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