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@ARTICLE{Gueting:203161,
      author       = {Gueting, Nils and Klotzsche, Anja and van der Kruk, Jan and
                      Vanderborght, Jan and Vereecken, Harry and Englert, Andreas},
      title        = {{I}maging and characterization of facies heterogeneity in
                      an alluvial aquifer using {GPR} full-waveform inversion and
                      cone penetration tests},
      journal      = {Journal of hydrology},
      volume       = {524},
      issn         = {0022-1694},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2015-05166},
      pages        = {680 - 695},
      year         = {2015},
      abstract     = {Spatially highly resolved mapping of aquifer
                      heterogeneities is critical for the accurate prediction of
                      groundwater flow and contaminant transport. Here, we
                      demonstrate the value of using full-waveform inversion of
                      crosshole ground penetrating radar (GPR) data for aquifer
                      characterization. We analyze field data from the Krauthausen
                      test site, where crosshole GPR data were acquired along a
                      transect of 20 m length and 10 m depth. Densely spaced cone
                      penetration tests (CPT), located close to the GPR transect,
                      were used to validate and interpret the tomographic images
                      obtained from GPR. A strong correlation was observed between
                      CPT porosity logs and porosity estimates derived from GPR
                      using the Complex Refractive Index Model (CRIM). A less
                      pronounced correlation was observed between electrical
                      conductivity data derived from GPR and CPT. Cluster analysis
                      of the GPR data defined three different subsurface facies,
                      which were found to correspond to sediments with different
                      grain size and porosity. In conclusion, our study suggests
                      that full-waveform inversion of crosshole GPR data followed
                      by cluster analysis is an applicable approach to identify
                      hydrogeological facies in alluvial aquifers and to map their
                      architecture and connectivity. Such facies maps provide
                      valuable information about the subsurface heterogeneity and
                      can be used to construct geologically realistic subsurface
                      models for numerical flow and transport prediction.},
      cin          = {IBG-3},
      ddc          = {690},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000354503300052},
      doi          = {10.1016/j.jhydrol.2015.03.030},
      url          = {https://juser.fz-juelich.de/record/203161},
}