Using HydroGeoSphere in a forested catchment: How does spatial resolution influence the simulation of spatio-temporal soil moisture variability?

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*Title:*	Main Title: Using HydroGeoSphere in a forested catchment: How does spatial resolution influence the simulation of spatio-temporal soil moisture variability?
*Description:*	Abstract: Soil moisture is a key variable in the soil-plant-atmosphere system because it interacts with various system components. Both the measurement and the simulation of the soil moisture pattern and its spatio-temporal variability are current challenges in hydrology. This study applies the model HydroGeoSphere in a natural forest ecosystem to assess whether the model can simulate the spatio-temporal variability and pattern of soil moisture. The assessment is performed by comparing the simulation results with soil moisture measurements. The model is used at two different model resolutions to reveal the scale dependency of the calibrated model parameters, the water balance, the discharge components, and the spatial distribution of soil moisture and its variogram parameters. Discharge simulation results show that the model is capable of reproducing the discharge characteristics. A weak correlation is found between simulated and measured soil moisture dynamics in the topsoil, but the correlation is stronger in 20 cm depth. In 50 cm depth, the model is able to simulate the seasonal trend but not the short-term dynamics because preferential flow is not simulated. Furthermore, a decrease in soil moisture variance during continued drying is observed for both simulations and the measurements at both resolutions. In addition, the pattern of measured soil moisture shows a patchy character that does not show in the simulated pattern indicating that using uniform soil properties in the topsoil makes the soil moisture simulation inaccurate.
*Identifier:*	10.1016/j.proenv.2013.06.022 (DOI)

Responsible Party

*Creators:*	Thomas Cornelissen (Author), Bernd Diekkrüger (Author), Heye Bogena (Author)
*Publisher:*	Elsevier
*Publication Year:*	2013

Topic

*TR32 Topic:*	Other
*Related Subproject:*	C1
*Subjects:*	Keywords: Hydrological Modelling, Pattern Analysis, Spatial Heterogeneity, Vegetation-Hyrology interactions

File Details

*Filename:*	2013_Cornelissen_NSG.pdf
*Data Type:*	Text - Article
*Size:*	10 Pages
*File Size:*	776 KB
*Date:*	Available: 24.07.2013
*Mime Type:*	application/pdf
*Data Format:*	PDF
*Language:*	English
*Status:*	Completed

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*Download Permission:*	Only Project Members
*General Access and Use Conditions:*	For internal use only
*Access Limitations:*	For internal use only
*Licence:*	[TR32DB] Data policy agreement

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Specific Information - Publication

*Publication Status:*	Published
*Review Status:*	Peer reviewed
*Publication Type:*	Article
*Article Type:*	Journal
*Source:*	Procedia Environmental Sciences
*Volume:*	19
*Number of Pages:*	10 (198 - 207)

Metadata Details

*Metadata Creator:*	Thomas Cornelissen
*Metadata Created:*	02.12.2013
*Metadata Last Updated:*	02.12.2013
*Subproject:*	C1
*Funding Phase:*	2
*Metadata Language:*	English
*Metadata Version:*	V50

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