{
  "_id": "6a17f695acfb0bcc41da89f5",
  "Package": "elfgen",
  "Title": "Ecological Limit Function Model Generation and Analysis Toolkit",
  "Version": "2.3.5",
  "Authors@R": "c(\nperson(given = \"Joseph\",\nfamily = \"Kleiner\",\nrole = \"aut\",\nemail = \"joseph.d.kleiner@gmail.com\",\ncomment = c(ORCID = \"0000-0003-4837-7678\")\n),\nperson(given = \"Robert\",\nfamily = \"Burgholzer\",\nemail = \"robert.burgholzer@deq.virginia.gov\",\nrole = \"ctb\",\ncomment = c(ORCID = \"0000-0002-7290-4928\")\n),\nperson(given = \"Connor\",\nfamily = \"Brogan\",\nemail = \"connor.brogan@deq.virginia.gov\",\nrole = \"cre\",\ncomment = c(ORCID = \"0000-0001-9377-1805\")\n)\n)",
  "Maintainer": "Connor Brogan <connor.brogan@deq.virginia.gov>",
  "Description": "A toolset for generating Ecological Limit Function (ELF)\nmodels and evaluating potential species loss resulting from\nflow change, based on the 'elfgen' framework. ELFs describe the\nrelation between aquatic species richness (fish or benthic\nmacroinvertebrates) and stream size characteristics (streamflow\nor drainage area). Journal publications are available outlining\nframework methodology (Kleiner et al. (2020)\n<doi:10.1111/1752-1688.12876>) and application (Rapp et al.\n(2020) <doi:10.1111/1752-1688.12877>).",
  "License": "MIT + file LICENSE",
  "URL": "https://github.com/HARPgroup/elfgen",
  "RoxygenNote": "7.3.2",
  "LazyData": "true",
  "Encoding": "UTF-8",
  "Config/pak/sysreqs": "libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev\nlibicu-dev libpng-dev libsecret-1-dev libxml2-dev libssl-dev\nlibproj-dev libsqlite3-dev libudunits2-dev libx11-dev",
  "Repository": "https://harpgroup.r-universe.dev",
  "Date/Publication": "2026-05-22 18:42:06 UTC",
  "RemoteUrl": "https://github.com/harpgroup/elfgen",
  "RemoteRef": "HEAD",
  "RemoteSha": "3d3f56971cac740c6937fe5540d1d8dee6217894",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-05-28 07:57:59 UTC",
    "User": "root"
  },
  "Author": "Joseph Kleiner [aut] (ORCID: <https://orcid.org/0000-0003-4837-7678>),\nRobert Burgholzer [ctb] (ORCID:\n<https://orcid.org/0000-0002-7290-4928>),\nConnor Brogan [cre] (ORCID: <https://orcid.org/0000-0001-9377-1805>)",
  "MD5sum": "f452e75f132d3a55c30f8c56cf882780",
  "_user": "harpgroup",
  "_type": "src",
  "_file": "elfgen_2.3.5.tar.gz",
  "_fileid": "ea5ec1b6cb63e28eb18d4227f648fc0baec636598f80c44b83ad347776766d2c",
  "_filesize": 291997,
  "_sha256": "ea5ec1b6cb63e28eb18d4227f648fc0baec636598f80c44b83ad347776766d2c",
  "_created": "2026-05-28T07:57:59.000Z",
  "_published": "2026-05-28T08:02:29.326Z",
  "_distro": "noble",
  "_jobs": [
    {
      "job": 78248250433,
      "time": 206,
      "config": "linux-devel-x86_64",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "7260692033"
    },
    {
      "job": 78248250377,
      "time": 210,
      "config": "linux-release-x86_64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7260693726"
    },
    {
      "job": 78248250464,
      "time": 117,
      "config": "macos-oldrel-arm64",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "7260664975"
    },
    {
      "job": 78248250450,
      "time": 124,
      "config": "macos-release-arm64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7260666531"
    },
    {
      "job": 78247706423,
      "time": 217,
      "config": "source",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7260630576"
    },
    {
      "job": 78248250346,
      "time": 145,
      "config": "wasm-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7260672697"
    },
    {
      "job": 78248250406,
      "time": 218,
      "config": "windows-devel",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "7260696101"
    },
    {
      "job": 78248250429,
      "time": 140,
      "config": "windows-oldrel",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "7260671483"
    },
    {
      "job": 78248250409,
      "time": 143,
      "config": "windows-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7260672365"
    }
  ],
  "_buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212",
  "_status": "success",
  "_host": "GitHub-Actions",
  "_upstream": "https://github.com/harpgroup/elfgen",
  "_commit": {
    "id": "3d3f56971cac740c6937fe5540d1d8dee6217894",
    "author": "Connor Brogan <connor.brogan@deq.virginia.gov>",
    "committer": "Connor Brogan <connor.brogan@deq.virginia.gov>",
    "message": "Updated cran comments\n",
    "time": 1779475326
  },
  "_maintainer": {
    "name": "Connor Brogan",
    "email": "connor.brogan@deq.virginia.gov",
    "login": "cobrogan",
    "description": "VPDES Modeler at Virginia DEQ. Environmental Specialist II.",
    "uuid": 79171911,
    "orcid": "0000-0001-9377-1805"
  },
  "_registered": true,
  "_dependencies": [
    {
      "package": "R",
      "version": ">= 3.5",
      "role": "Depends"
    },
    {
      "package": "utils",
      "role": "Imports"
    },
    {
      "package": "stringr",
      "role": "Imports"
    },
    {
      "package": "quantreg",
      "role": "Imports"
    },
    {
      "package": "stats",
      "role": "Imports"
    },
    {
      "package": "ggplot2",
      "role": "Imports"
    },
    {
      "package": "testit",
      "role": "Imports"
    },
    {
      "package": "scales",
      "role": "Imports"
    },
    {
      "package": "sqldf",
      "role": "Imports"
    },
    {
      "package": "curl",
      "role": "Imports"
    },
    {
      "package": "sbtools",
      "role": "Imports"
    },
    {
      "package": "nhdplusTools",
      "role": "Imports"
    },
    {
      "package": "testthat",
      "version": ">= 2.1.0",
      "role": "Suggests"
    }
  ],
  "_owner": "harpgroup",
  "_selfowned": true,
  "_usedby": 0,
  "_updates": [
    {
      "week": "2025-43",
      "n": 1
    },
    {
      "week": "2025-44",
      "n": 5
    },
    {
      "week": "2025-45",
      "n": 4
    },
    {
      "week": "2025-46",
      "n": 3
    },
    {
      "week": "2026-21",
      "n": 6
    }
  ],
  "_tags": [
    {
      "name": "2.3.4",
      "date": "2025-10-30"
    },
    {
      "name": "2.3.5",
      "date": "2026-05-22"
    }
  ],
  "_topics": [
    "ecology",
    "hydrology",
    "visualization"
  ],
  "_stars": 2,
  "_contributors": [
    {
      "user": "jdkleiner",
      "count": 117,
      "uuid": 29379385
    },
    {
      "user": "cobrogan",
      "count": 27,
      "uuid": 79171911
    },
    {
      "user": "rburghol",
      "count": 9,
      "uuid": 4571170
    }
  ],
  "_userbio": {
    "uuid": 31551100,
    "type": "organization",
    "name": "Hydrologic Analysis Research Program",
    "description": "HARP ~ a collaboration between DEQ and Virginia Tech"
  },
  "_downloads": {
    "count": 271,
    "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/elfgen"
  },
  "_devurl": "https://github.com/harpgroup/elfgen",
  "_searchresults": 26,
  "_rbuild": "4.6.0",
  "_assets": [
    "extra/citation.cff",
    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/elfgen.html",
    "extra/NEWS.html",
    "extra/NEWS.txt",
    "extra/readme.html",
    "extra/readme.md",
    "manual.pdf"
  ],
  "_homeurl": "https://github.com/harpgroup/elfgen",
  "_realowner": "harpgroup",
  "_cranurl": true,
  "_releases": [
    {
      "version": "2.2.3",
      "date": "2022-02-08"
    },
    {
      "version": "2.2.7",
      "date": "2022-03-24"
    },
    {
      "version": "2.2.8",
      "date": "2022-03-29"
    },
    {
      "version": "2.3.0",
      "date": "2022-05-21"
    },
    {
      "version": "2.3.3",
      "date": "2022-08-23"
    },
    {
      "version": "2.3.4",
      "date": "2025-11-28"
    },
    {
      "version": "2.3.5",
      "date": "2026-05-23"
    }
  ],
  "_exports": [
    "bkpt_pwit",
    "bkpt_ymax",
    "clean_vahydro",
    "elfchange",
    "elfdata",
    "elfdata_vahydro",
    "elfgen",
    "richness_change"
  ],
  "_datasets": [
    {
      "name": "watershed.df",
      "title": "elfdata for NHD Watershed HUC 0208020104",
      "object": "watershed.df",
      "class": [
        "data.frame"
      ],
      "fields": [
        "MAF",
        "NT.TOTAL.UNIQUE",
        "watershed.code",
        "Q01",
        "Q02",
        "Q03",
        "Q04",
        "Q05",
        "Q06",
        "Q07",
        "Q08",
        "Q09",
        "Q10",
        "Q11",
        "Q12"
      ],
      "rows": 81,
      "table": true,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "bkpt_pwit",
      "title": "Identify breakpoint location with PWIT",
      "topics": [
        "bkpt_pwit"
      ]
    },
    {
      "page": "bkpt_ymax",
      "title": "Identify breakpoint location with Ymax",
      "topics": [
        "bkpt_ymax"
      ]
    },
    {
      "page": "clean_vahydro",
      "title": "Clean dataset of ecological and hydrologic data",
      "topics": [
        "clean_vahydro"
      ]
    },
    {
      "page": "elfchange",
      "title": "Plot percent richness change for various percent flow reductions",
      "topics": [
        "elfchange"
      ]
    },
    {
      "page": "elfdata",
      "title": "Retrieve and format data for ELF generation",
      "topics": [
        "elfdata"
      ]
    },
    {
      "page": "elfdata_vahydro",
      "title": "Retrieve data from DEQ VAHydro database and format data for ELF generation. Contact Virginia DEQ Office of Water Supply to request access to the VAHydro database.",
      "topics": [
        "elfdata_vahydro"
      ]
    },
    {
      "page": "elfgen",
      "title": "Generate Ecological Limit Function (ELF)",
      "topics": [
        "elfgen"
      ]
    },
    {
      "page": "richness_change",
      "title": "Calculate change in richness resulting from a percent reduction in flow",
      "topics": [
        "richness_change"
      ]
    },
    {
      "page": "watershed.df",
      "title": "elfdata for NHD Watershed HUC 0208020104",
      "topics": [
        "watershed.df"
      ]
    }
  ],
  "_pkglogo": "https://github.com/harpgroup/elfgen/raw/HEAD/man/figures/logo.png",
  "_readme": "https://github.com/harpgroup/elfgen/raw/HEAD/README.md",
  "_rundeps": [
    "arrow",
    "askpass",
    "assertthat",
    "bit",
    "bit64",
    "blob",
    "cachem",
    "chron",
    "class",
    "classInt",
    "cli",
    "clipr",
    "cpp11",
    "crayon",
    "curl",
    "data.table",
    "dataRetrieval",
    "DBI",
    "digest",
    "dplyr",
    "e1071",
    "farver",
    "fastmap",
    "filelock",
    "fst",
    "fstcore",
    "generics",
    "ggplot2",
    "glue",
    "gsubfn",
    "gtable",
    "hms",
    "httr",
    "httr2",
    "hydroloom",
    "isoband",
    "jsonlite",
    "KernSmooth",
    "keyring",
    "labeling",
    "lattice",
    "lifecycle",
    "lubridate",
    "magrittr",
    "maplegend",
    "mapsf",
    "maptiles",
    "MASS",
    "Matrix",
    "MatrixModels",
    "memoise",
    "mime",
    "nhdplusTools",
    "openssl",
    "pbapply",
    "pillar",
    "pkgconfig",
    "png",
    "prettyunits",
    "progress",
    "proto",
    "proxy",
    "purrr",
    "quantreg",
    "R.methodsS3",
    "R.oo",
    "R.utils",
    "R6",
    "RANN",
    "rappdirs",
    "RColorBrewer",
    "Rcpp",
    "readr",
    "rlang",
    "RSQLite",
    "s2",
    "S7",
    "sbtools",
    "scales",
    "sf",
    "SparseM",
    "sqldf",
    "stringi",
    "stringr",
    "survival",
    "sys",
    "terra",
    "testit",
    "tibble",
    "tidyr",
    "tidyselect",
    "timechange",
    "tzdb",
    "units",
    "utf8",
    "vctrs",
    "viridisLite",
    "vroom",
    "whisker",
    "withr",
    "wk",
    "xml2",
    "yaml",
    "zip"
  ],
  "_score": 4.414973347970818,
  "_indexed": true,
  "_nocasepkg": "elfgen",
  "_universes": [
    "harpgroup",
    "cobrogan"
  ],
  "_previous": "2.3.4",
  "_binaries": [
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "2.3.5",
      "date": "2026-05-28T08:00:37.000Z",
      "distro": "noble",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "c74c9b1050a883522663f0a53ef6717c4a6a565ba383fae15297914e0e96cbf6",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "2.3.5",
      "date": "2026-05-28T08:00:39.000Z",
      "distro": "noble",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "ea962b23e8e929751c4890260b850183e0244f435dcef492c29cf98120cb4927",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "2.3.5",
      "date": "2026-05-28T07:59:36.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "be3ec5e337e5ea105cea3d0d0ff31f306a5ec274e46d416a2b70afef9c48a222",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "2.3.5",
      "date": "2026-05-28T07:59:39.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "fd2eb1f1fb1fe699ea329348c5fb1fce53558768d22d259ecf6289649a4b7046",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.6.0",
      "os": "wasm",
      "version": "2.3.5",
      "date": "2026-05-28T08:00:44.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "c138e3bf320216c276d988cb97bc241a2d0f25b738aca95a0ab602dc265ce12c",
      "status": "success",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.7.0",
      "os": "win",
      "version": "2.3.5",
      "date": "2026-05-28T08:00:31.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "f0f2c49f81327518c9a9230e49a9819b27eaa6a1cc64cfbcd29f1722c6f18e3e",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.5.3",
      "os": "win",
      "version": "2.3.5",
      "date": "2026-05-28T07:59:26.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "46b05b5828dc7db8b64c58ba7899f8ad38a140f59a9b5273df6bc8c354a8f33c",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    },
    {
      "r": "4.6.0",
      "os": "win",
      "version": "2.3.5",
      "date": "2026-05-28T07:59:28.000Z",
      "commit": "3d3f56971cac740c6937fe5540d1d8dee6217894",
      "fileid": "518a0706671a2676813fe3f595882312e5b11bf9f39084e8bb1a9956b0f3464b",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/harpgroup/actions/runs/26562180212"
    }
  ]
}