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000155360 0247_ $$2doi$$a10.1016/j.jhydrol.2014.01.060
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000155360 1001_ $$0P:(DE-HGF)0$$aCornelissen, Thomas$$b0$$eCorresponding Author
000155360 245__ $$aSignificance of scale and lower boundary condition in the 3D simulation of hydrological processes and soil moisture variability in a forested headwater catchment
000155360 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2014
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000155360 520__ $$aThe measurement and simulation of soil moisture patterns and their spatio-temporal variability are current challenges in hydrology. This study investigated the capability of the three-dimensional model HydroGeoSphere to simulate hydrological processes, soil moisture dynamics and patterns at 25 and 100 m resolutions with daily and hourly time steps in a forested headwater catchment. All simulations reproduced discharge dynamics well, calculated a dominance of the baseflow component but missed macropore driven discharge peaks in the summer and slightly overestimated the discharge. A comparison of discharge and water balance results between daily and hourly time steps revealed considerable scaling issues of saturated conductivity values and in the model’s interception module. Temporally and spatially highly resolved soil moisture measurements were used to calibrate residual saturations and porosities at daily time steps. Therefore, all model setups simulated the long-term temporal soil moisture dynamics well, but short-term soil moisture dynamics were poorly simulated because the simulation did not take into account the effect of macropore flow. The spatial soil moisture patterns of the topsoil were well reproduced except for certain parts in the western part of the catchment. A correlation analysis revealed that the influence of the topography was overestimated in the simulated soil moisture pattern. The spatial scale dependency of all aforementioned results was small due to independent calibration. The consideration of bedrock damped discharge peaks, increased low flow and slightly improved temporal soil moisture simulation.
000155360 536__ $$0G:(DE-HGF)POF2-246$$a246 - Modelling and Monitoring Terrestrial Systems: Methods and Technologies (POF2-246)$$cPOF2-246$$fPOF II$$x0
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000155360 7001_ $$0P:(DE-HGF)0$$aDiekkrüger, Bernd$$b1
000155360 7001_ $$0P:(DE-HGF)0$$aBogena, Heye R.$$b2
000155360 773__ $$0PERI:(DE-600)1473173-3$$a10.1016/j.jhydrol.2014.01.060$$gVol. 516, p. 140 - 153$$p140 - 153$$tJournal of hydrology$$v516$$x0022-1694$$y2014
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