Package: okBATHTUB
Title: Empirical Reservoir Eutrophication Modelling with Oklahoma
        Calibration
Version: 0.1.10
Authors@R: 
    person("Jordon", "Henderson",
           role  = c("aut", "cre", "cph"),
           email = "jordon.henderson@owrb.ok.gov")
Description: Empirical reservoir water quality modelling using Walker's
    'BATHTUB' Model 1 (second-order available-phosphorus sedimentation)
    from Walker (1985) <https://hdl.handle.net/11681/13884>
    and Walker (1996) <https://hdl.handle.net/11681/4353> as the
    default retention model. The Vollenweider (1976) hydraulic-
    residence form and the equivalent formulation of Larsen and Mercier
    (1976) are available as alternatives. Predicts in-lake total
    phosphorus, total nitrogen, chlorophyll-a, and Secchi depth from
    tributary nutrient and hydraulic loading inputs, and computes
    Carlson (1977) <doi:10.4319/lo.1977.22.2.0361> Trophic State
    Indices. Optional Oklahoma-specific chlorophyll and Secchi
    regression coefficients are provided, calibrated from publicly
    available state lake monitoring data. Supports single-segment and
    multi-segment reservoir configurations and load-reduction scenario
    analysis. Designed to complement watershed loading models such as
    the Soil and Water Assessment Tool ('SWAT';
    <https://swat.tamu.edu>) and the U.S. EPA Hydrologic and Water
    Quality System ('HAWQS'; <https://hawqs.tamu.edu>) in a
    two-model nutrient management workflow.
License: MIT + file LICENSE
Encoding: UTF-8
Depends: R (>= 4.1.0)
Imports: utils
Suggests: ggplot2 (>= 3.4.0), dplyr (>= 1.1.0), tidyr (>= 1.3.0),
        stringr (>= 1.5.0), knitr, rmarkdown, testthat (>= 3.0.0)
Config/testthat/edition: 3
VignetteBuilder: knitr
LazyData: true
URL: https://0011235813.github.io/Oklahoma-BATHTUB/,
        https://github.com/0011235813/Oklahoma-BATHTUB
BugReports: https://github.com/0011235813/Oklahoma-BATHTUB/issues
Config/roxygen2/version: 8.0.0
NeedsCompilation: no
Packaged: 2026-05-23 15:22:21 UTC; 364483
Author: Jordon Henderson [aut, cre, cph]
Maintainer: Jordon Henderson <jordon.henderson@owrb.ok.gov>
Repository: CRAN
Date/Publication: 2026-05-29 11:30:02 UTC
