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000000423 0247_ $$2DOI$$a10.1016/S0022-1694(02)00052-5
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000000423 084__ $$2WoS$$aEngineering, Civil
000000423 084__ $$2WoS$$aGeosciences, Multidisciplinary
000000423 084__ $$2WoS$$aWater Resources
000000423 1001_ $$0P:(DE-HGF)0$$aMertens, J.$$b0
000000423 245__ $$aCharacterisation of the field-saturated hydraulic conductivity on a hillslope : in situ single ring pressure infiltrometer measurements
000000423 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2002
000000423 300__ $$a217 - 229
000000423 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000000423 440_0 $$03225$$aJournal of Contaminant Hydrology$$v263$$x0169-7722
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000000423 520__ $$aSpatial variability of surface hydraulic properties is an important factor for infiltration and runoff processes in agricultural fields. At 120 locations on a hillslope, steady-state infiltration rates were measured at two applied pressure heads with a single-ring infiltrometer. The solution of two steady-state infiltration equations for each location (the simultaneous-equation approach, SEA) yielded 41 negative alpha-values, 79 positive alpha values and 120 positive K-fs-values. The sensitivity of K-fs and alpha to small measurement errors was estimated using a Monte-Carlo simulation (MC). Results of this MC simulation showed that the uncertainty on alpha is extremely high while the uncertainty on K-fs is fairly small. Hence, although the pressure infiltrometer technique as applied here is useful to estimate K-fs at each measurement location, it is not suited for the estimation of an alpha-value at each measurement location. A new procedure is proposed for the simultaneous estimation of one overall 'field alpha' and the 79 K-fs values of measurement locations having a positively calculated a using SEA. Using this field alpha, K-fs values for the other locations with a negative a are hence determined. Finally, the spatial correlation of K-fs on the hillslope is examined. Ranges of ln(K-fs) between 2.85 and 3.8 m were observed, respectively, for the omnidirectional case and the y direction along the hillslope mu. (C) 2002 Elsevier Science B.V. All rights reserved.
000000423 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0
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000000423 650_7 $$2WoSType$$aJ
000000423 65320 $$2Author$$ahydraulic conductivity
000000423 65320 $$2Author$$ahillslope
000000423 65320 $$2Author$$ainverse parameter estimation
000000423 65320 $$2Author$$asensitivity analysis
000000423 65320 $$2Author$$aspatial variability
000000423 7001_ $$0P:(DE-HGF)0$$aJacques, D.$$b1
000000423 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, J.$$b2$$uFZJ
000000423 7001_ $$0P:(DE-HGF)0$$aFeyen, J.$$b3
000000423 773__ $$0PERI:(DE-600)1494766-3$$a10.1016/S0022-1694(02)00052-5$$gVol. 263, p. 217 - 229$$p217 - 229$$q263<217 - 229$$tJournal of contaminant hydrology$$v263$$x0169-7722$$y2002
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000000423 9141_ $$y2002
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