assign_season

Adiciona a coluna <code>season</code> ao data frame, classificando cada
amostra como <code>"chuvoso"</code> ou <code>"seco"</code> com base no mes de
coleta e no calendario hidrologico regional brasileiro.

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)
<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).

Vinicius Saraiva Santos

tikatuwq

Water Quality Assessment and Environmental Compliance in Brazil

assign_season function

<dl><dt>df</dt>
<dd>Data frame com ao menos a coluna <code>date_col</code>.</dd>
<dt>region</dt>
<dd>Character; regiao climatica. Uma de <code>"sudeste"</code>,
<code>"bahia"</code>, <code>"centro_oeste"</code>, <code>"nordeste"</code>,
<code>"norte"</code>, <code>"sul"</code> ou <code>"custom"</code>.</dd>
<dt>date_col</dt>
<dd>Character; nome da coluna de datas. Default <code>"data"</code>.</dd>
<dt>wet_months</dt>
<dd>Integer vector; meses numericos do periodo chuvoso
(1 = Jan ... 12 = Dez). Obrigatorio quando <code>region = "custom"</code>.</dd>
<dt>labels</dt>
<dd>Character vector de comprimento 2 com os rotulos para os
periodos chuvoso e seco, nesta ordem.
Default <code>c("chuvoso", "seco")</code>.</dd></dl>

Arguments

Atribui periodo hidrologico (chuvoso / seco) a cada amostra — assign_season

<dl>

<dt>df</dt>
<dd>Data frame com ao menos a coluna <code>date_col</code>.</dd>


<dt>region</dt>
<dd>Character; regiao climatica. Uma de <code>"sudeste"</code>,
<code>"bahia"</code>, <code>"centro_oeste"</code>, <code>"nordeste"</code>,
<code>"norte"</code>, <code>"sul"</code> ou <code>"custom"</code>.</dd>


<dt>date_col</dt>
<dd>Character; nome da coluna de datas. Default <code>"data"</code>.</dd>


<dt>wet_months</dt>
<dd>Integer vector; meses numericos do periodo chuvoso
(1 = Jan ... 12 = Dez). Obrigatorio quando <code>region = "custom"</code>.</dd>


<dt>labels</dt>
<dd>Character vector de comprimento 2 com os rotulos para os
periodos chuvoso e seco, nesta ordem.
Default <code>c("chuvoso", "seco")</code>.</dd>

</dl>

assign_season: Atribui periodo hidrologico (chuvoso / seco) a cada amostra

Description

Usage

Value

Arguments

Details

See Also

Examples