To cite package 'weirs' in publications use:

Asquith WH (2026). weirs—A hydraulics package to compute open-channel flow over weirs. R package version 0.26.

Corresponding BibTeX entry:

  @Manual{,
    title = {weirs---A hydraulics package to compute open-channel flow
      over weirs},
    author = {William H. Asquith},
    year = {2026},
    note = {R package version 0.26},
  }