Package: tikatuwq
Type: Package
Title: Water Quality Assessment and Environmental Compliance in Brazil
Version: 0.11.0
Authors@R: c(
    person(
      given = "Vinicius",
      family = "Saraiva Santos",
      role = c("aut", "cre"),
      email = "vinisaraiva@gmail.com",
      comment = c(ORCID = "0009-0007-1387-7927")
    ),
    person(
      given = "Fabricio",
      family = "Berton Zanchi",
      role = "ctb",
      email = "fabricio.berton@ufsb.edu.br",
      comment = c(ORCID = "0000-0002-8074-2893")
    )
  )
Maintainer: Vinicius Saraiva Santos <vinisaraiva@gmail.com>
Description: 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, an
        independent engine reproducing the 'IQA' of the Minas Gerais
        water agency 'IGAM' (a documented reproduction, not endorsed by
        the agency), paired comparison of 'IQA' engines with
        compare_iqa(), the Trophic State Index ('TSI'/'IET') after
        Carlson (1977) <doi: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).
License: MIT + file LICENSE
Encoding: UTF-8
Language: en-US
LazyData: true
LazyDataCompression: xz
Depends: R (>= 4.1)
Imports: dplyr, readr, tibble, rlang, stats, utils, ggplot2, tidyr,
        lubridate, stringr, glue, scales, broom, purrr, tools
Suggests: testthat (>= 3.0.0), spelling, rmarkdown, knitr, pkgdown,
        leaflet, withr
VignetteBuilder: knitr
URL: https://github.com/tikatuwq/tikatuwq,
        https://tikatuwq.github.io/tikatuwq/
BugReports: https://github.com/tikatuwq/tikatuwq/issues
Roxygen: list(markdown = TRUE)
Config/testthat/edition: 3
RoxygenNote: 7.3.3
Config/pak/sysreqs: libicu-dev libx11-dev
Repository: https://tikatuwq.r-universe.dev
Date/Publication: 2026-10-17 00:06:35 UTC
RemoteUrl: https://github.com/tikatuwq/tikatuwq
RemoteRef: HEAD
RemoteSha: 49b6683aa1758ec53e135b219794845b8d729cc8
NeedsCompilation: no
Packaged: 2026-10-17 00:30:10 UTC; root
Author: Vinicius Saraiva Santos [aut, cre] (ORCID:
    <https://orcid.org/0009-0007-1387-7927>),
  Fabricio Berton Zanchi [ctb] (ORCID:
    <https://orcid.org/0000-0002-8074-2893>)