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@ARTICLE{Altdorff:134440,
      author       = {Altdorff, Daniel and Epting, J. and van der Kruk, Jan and
                      Dietrich, P. and Huggenberger, P.},
      title        = {{D}elineation of fluvial sediment architecture of subalpine
                      riverinesystems using noninvasive hydrogeophysical methods},
      journal      = {Environmental earth sciences},
      volume       = {69},
      number       = {2},
      issn         = {1866-6280},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2013-02639},
      pages        = {633-644},
      year         = {2013},
      abstract     = {River management and restoration measures are of increasing
                      importance for integrated water resources management (IWRM)
                      as well as for ecosystem services. However, often river
                      management mainly considers engineering and construction
                      aspects only and the hydrogeological settings as the
                      properties and functions of ancient fluvial systems are
                      neglected which often do not lead to the desired outcome.
                      Knowledge of the distribution of sediment units could
                      contribute to a more efficient restoration. In this study,
                      we present two noninvasive approaches for delineation of
                      fluvial sediment architecture that can form a basis for the
                      restoration, particularly in areas where site disturbance is
                      not permitted. We investigate the floodplain of a heavily
                      modified low-mountain river in Switzerland using different
                      hydrogeophysical methods. In the first approach, we use data
                      from electromagnetic induction (EMI) with four different
                      integral depths (0.75–6 m) and gamma-spectrometry as well
                      as the elevation data as input for a K-means cluster
                      algorithm. The generated cluster map of the surface combines
                      the main characteristics from multilayered input data and
                      delineates areas of varying soil properties. The resulting
                      map provides an indication of areas with different
                      sedimentary units. In the second approach, we develop a new
                      iterative method for the generation of a geological
                      structure model (GSM) by means of various EMI forward
                      models. We vary the geological input parameters based on the
                      measured data until the predicted EMI maps match the
                      measured EMI values. Subsequently, we use the best matched
                      input data for the GSM generation. The derived GSM provides
                      a 3D delineation of possible ancient stream courses. A
                      comparison with an independent ground penetrating radar
                      (GPR) profile confirmed the delineations on the cluster map
                      as well as the vertical changes of the GSM qualitatively.
                      Thus, each of the approaches had the capacity for detecting
                      sedimentary units with distinct hydraulic properties as an
                      indication of former stream courses. The developed
                      methodology presents a promising tool for the
                      characterization of test sites with no additional subsurface
                      information.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246)},
      pid          = {G:(DE-HGF)POF2-246},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000318280400024},
      doi          = {10.1007/s12665-013-2304-4},
      url          = {https://juser.fz-juelich.de/record/134440},
}