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@ARTICLE{Siebers:916964,
      author       = {Siebers, Nina and Kruse, Jens and Jia, Yunsheng and
                      Lennartz, Bernd and Koch, Stefan},
      title        = {{L}oss of subsurface particulate and truly dissolved
                      phosphorus during various flow conditions along a tile
                      drain–ditch–brook continuum},
      journal      = {The science of the total environment},
      volume       = {866},
      issn         = {0048-9697},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2023-00230},
      pages        = {161439 -},
      year         = {2023},
      abstract     = {Subsurface losses of colloidal and truly dissolved
                      phosphorus (P) from arable land can cause ecological damage
                      to surface water. To gain deeper knowledge about subsurface
                      particulate P transport from inland sources to brooks, we
                      studied an artificially drained lowland catchment (1550 ha)
                      in north-eastern Germany. We took daily samples during the
                      winter discharge period 2019/2020 at different locations,
                      i.e., a drain outlet, ditch, and brook, and analyzed them
                      for total P (TPunfiltered), particulate P >750 nm (TP>750
                      nm), colloidal P (TPcolloids), and truly dissolved P (truly
                      DP) during baseflow conditions and high flow events. The
                      majority of TPunfiltered in the tile drain, ditch, and brook
                      was formed by TP>750 nm (54 to 59 $\%),$ followed by truly
                      DP (34 to 38 $\%)$ and a small contribution of TPcolloids (5
                      to 6 $\%).$ During flow events, 63 to 66 $\%$ of
                      TPunfiltered was present as particulate P (TP>750 nm +
                      TPcolloids), whereas during baseflow the figure was 97 to 99
                      $\%;$ thus, truly DP was almost negligible (1 to 3 $\%$ of
                      TPunfiltered) during baseflow. We also found that colloids
                      transported in the water samples have their origin in the
                      water-extractable nanocolloids (0.66 to 20 nm) within the C
                      horizon, which are mainly composed of clay minerals. Along
                      the flow path there is an agglomeration of P-bearing
                      nanocolloids from the soil, with an increasing importance of
                      iron(III) (hydr)oxides over clay particles. Event flow
                      facilitated the transport of greater amounts of larger
                      particles (>750 nm) through the soil matrix. However, the
                      discharge did not exhaust colloid mobilization and colloidal
                      P was exported through the tile-drainage system during the
                      complete runoff period, even under baseflow conditions.
                      Therefore, it is essential that the impact of rainfall
                      intensity and pattern on particulate P discharge be
                      considered more closely so that drainage management can be
                      adjusted to achieve a reduced P export from agricultural
                      land.},
      cin          = {IBG-3},
      ddc          = {610},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36623669},
      UT           = {WOS:000921740300001},
      doi          = {10.1016/j.scitotenv.2023.161439},
      url          = {https://juser.fz-juelich.de/record/916964},
}