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@ARTICLE{Diouf:875310,
      author       = {Diouf, Ousmane Coly and Weihermüller, Lutz and Diedhiou,
                      Mathias and Vereecken, Harry and Faye, Seynabou Cissé and
                      Faye, Sérigne and Sylla, Samba Ndao},
      title        = {{M}odelling groundwater evapotranspiration in a shallow
                      aquifer in a semi-arid environment},
      journal      = {Journal of hydrology},
      volume       = {587},
      issn         = {0022-1694},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-01941},
      pages        = {124967 -},
      year         = {2020},
      abstract     = {The use of diurnal or seasonal water table fluctuation
                      (WTF) to estimate groundwater evapotranspiration (ETG) at
                      different land uses and climate conditions is increasing
                      applied in ecohydrological studies. In this study, we
                      applied the WTF method for a shallow aquifer in an urbanized
                      area in Senegal over the dry season 2000–2013.To analyze
                      the applicability and validity of the WTF method for this
                      site, and to understand the impact of the parameters used in
                      this method, the unsaturated /saturated system was first
                      simulated using the HYDRUS 1D model. The drawdown of the
                      water table ranges from 18.1 to 113.2 cm and 10.4 to 101.9
                      cm for a bare soil and a perennial grass scenario and is
                      highly related to the annual rainfall of the previous rainy
                      season. The results indicate that the mean daily FAO-PM
                      reference evapotranspiration rates for this area ranged from
                      2 to 4 mmd−1 and that the estimated actual
                      evapotranspiration (ETa) from the HYDRUS 1D model ranged
                      between 0.22 to 1.11 and 0.23 to 1.27 mmd−1 in bare soil
                      and vegetative condition, respectively. ETa and ETG were
                      well correlated for the vegetated scenario. However, the WTF
                      method slightly overestimates ETa fluxes in the bare soil
                      scenario. The study shows that the decline of ETa with water
                      table depth can be simulated by an exponential function. The
                      overall results indicate that higher ETa values were
                      observed when the water table is shallow, suggesting that
                      ETa is mainly driven by the water table depth at this site.},
      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:000568819100061},
      doi          = {10.1016/j.jhydrol.2020.124967},
      url          = {https://juser.fz-juelich.de/record/875310},
}