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@ARTICLE{Mertens:423,
      author       = {Mertens, J. and Jacques, D. and Vanderborght, J. and Feyen,
                      J.},
      title        = {{C}haracterisation of the field-saturated hydraulic
                      conductivity on a hillslope : in situ single ring pressure
                      infiltrometer measurements},
      journal      = {Journal of contaminant hydrology},
      volume       = {263},
      issn         = {0169-7722},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-423},
      pages        = {217 - 229},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Spatial 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.},
      keywords     = {J (WoSType)},
      cin          = {ICG-IV},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB50},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Engineering, Civil / Geosciences, Multidisciplinary / Water
                      Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000176261700014},
      doi          = {10.1016/S0022-1694(02)00052-5},
      url          = {https://juser.fz-juelich.de/record/423},
}