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# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "tikatuwq" in publications use:'
type: software
license: MIT
title: 'tikatuwq: Water Quality Assessment and Environmental Compliance in Brazil'
version: 0.9.0
doi: 10.5281/zenodo.17407297
identifiers:
- type: doi
  value: 10.32614/CRAN.package.tikatuwq
abstract: Tools to import, clean, validate, and analyze freshwater quality data in
  Brazil. Implements water quality indices including the Water Quality Index ('WQI'/'IQA')
  using the weighted geometric mean following 'CETESB' methodology, the Trophic State
  Index ('TSI'/'IET') after Carlson (1977) <https://doi.org/10.4319/lo.1977.22.2.0361>
  and Lamparelli (2004) <https://teses.usp.br/teses/disponiveis/41/41134/tde-20032006-075813/publico/TeseLamparelli2004.pdf>,
  and the National Sanitation Foundation Water Quality Index ('NSF WQI', Brown (1970)).
  The package also checks compliance with Brazilian standard 'CONAMA' Resolution 357/2005
  <https://conama.mma.gov.br/?id=450&option=com_sisconama&task=arquivo.download> including
  the legal frequency rule (Art. 15, 80% conformity over six or more samples per year),
  and provides seasonal analysis with regional flow-season calendars, pollutant load
  computation, exceedance probability estimation, 'IET' visualization, and multivariate
  'PCA' tools for routine monitoring workflows. The example dataset ('wq_demo') is
  a real subset from 'INEMA' monitoring data from a river in Bahia, Brazil (2020-2024).
authors:
- family-names: Saraiva Santos
  given-names: Vinicius
  email: vinisaraiva@gmail.com
  orcid: https://orcid.org/0009-0007-1387-7927
preferred-citation:
  type: manual
  title: 'tikatuwq: Water Quality Assessment and Environmental Compliance in Brazil'
  authors:
  - family-names: Santos
    given-names: Vinicius Saraiva
    email: vinisaraiva@gmail.com
    orcid: https://orcid.org/0009-0007-1387-7927
  year: '2025'
  notes: R package version 0.8.2
  doi: 10.5281/zenodo.17407297
  url: https://github.com/tikatuwq/tikatuwq
repository: https://cran.r-universe.dev
repository-code: https://github.com/tikatuwq/tikatuwq
commit: b663eef4cec4cb251d5b6828a53a3dbcb31e2680
url: https://tikatuwq.github.io/tikatuwq/
date-released: '2026-06-09'
contact:
- family-names: Saraiva Santos
  given-names: Vinicius
  email: vinisaraiva@gmail.com
  orcid: https://orcid.org/0009-0007-1387-7927