To cite package ‘flood’ in publications use:

Deiters F, Kinsvater P (2017). flood: Statistical Methods for the (Regional) Analysis of Flood Frequency. R package version 0.1.1, https://CRAN.R-project.org/package=flood.

Corresponding BibTeX entry:

  @Manual{,
    title = {flood: Statistical Methods for the (Regional) Analysis of
      Flood Frequency},
    author = {Friederike Deiters and Paul Kinsvater},
    year = {2017},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=flood},
  }