R Observatory: Metrics for swcEcon version 0.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

swcEcon

0.1.0Package record

Economic Analysis of Soil and Water Conservation Measures in Watersheds

0packages depend

1.9Kdownloads / year

76.5%test coverage

13/13flavors OK

Overview

About

Maintained by Sadikul IslamCRAN page ↗

Provides functions and benchmark datasets for the economic appraisal of soil and water conservation (SWC) measures in watershed development projects. Implements benefit-cost ratio (BCR), net present value (NPV), internal rate of return (IRR) via the bisection method of Brent (1973, ISBN:9780130223715), modified BCR, marginal rate of return using the CIMMYT (1988, ISBN:9686127127) method, payback period, soil loss economic valuation via the Universal Soil Loss Equation of Wischmeier and Smith (1978, ISBN:0160016258), groundwater recharge valuation, employment generation ratio, sensitivity analysis, switching value analysis, and Monte Carlo simulation. Six datasets are included: state-wise BCR benchmarks from NABARD (2019) watershed evaluations, USLE erodibility parameters for Indian soil orders from NBSS and LUP, rainfall erosivity for twenty Indian districts from IMD data, SWC unit cost norms from PMKSY-WDC (GoI 2015), and two hypothetical datasets for illustration. Methods follow Gittinger (1982, ISBN:9780801825439) and Squire and van der Tak (1975, ISBN:9780801816697).

Changes in 0.1.0

First CRAN release

New functions (16 exported)

calc_bcr() -- Benefit-cost ratio with discounting, benefit lag, residual value.
calc_npv() -- Net present value with annual cash-flow table.
calc_irr() -- Internal rate of return via bisection (Brent 1973).
calc_pbp() -- Simple and discounted payback period.
calc_mrr() -- Marginal rate of return (CIMMYT 1988).
calc_mbcr() -- Modified benefit-cost ratio (Gittinger 1982).
calc_soil_loss_cost() -- USLE-based soil loss economic valuation.
calc_nutrient_cost() -- NPK replacement cost from erosion.
calc_water_value() -- Groundwater recharge and runoff harvesting value.
calc_irrigation_benefit() -- Additional crop income from SWC-enabled irrigation.

Show all changes in 0.1.0Hide the rest of the changes in 0.1.0

calc_employment() -- Employment generation ratio with MGNREGS norm check.
sensitivity_analysis() -- One-at-a-time sensitivity analysis (8 scenarios).
calc_switching_value() -- Switching value for cost and benefit.
monte_carlo_swc() -- Stochastic BCR/NPV simulation (Pouliquen 1970).
run_swc_pipeline() -- Full appraisal pipeline in one call.
generate_swc_report() -- Self-contained HTML economic appraisal report.

Datasets (6)

swc_benchmarks -- Real: NABARD WDF Reports 2010-2022; PMKSY-WDC (GoI).
usle_india_soils -- Real: NBSS and LUP Technical Bulletin 132 (ICAR).
rainfall_erosivity_india -- Real: IMD + Bhattacharyya et al. (2010).
swc_cost_norms -- Real: PMKSY-WDC Common Guidelines (GoI 2015).
watershed_projects -- Hypothetical: set.seed(2025), 50 projects.
farmer_adoption -- Hypothetical: set.seed(2025), 120 households.

Technical notes

All source files are pure ASCII -- CRAN portable.
Dataset documentation uses NULL sentinel pattern for roxygen2 compatibility.
Zero runtime dependencies beyond base R (stats, graphics, grDevices, utils).
markdown = FALSE in DESCRIPTION -- plain Rd syntax throughout.

From NEWS.md in the release

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("swcEcon", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-swcecon

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-swcEcon

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-swcEcon

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.2 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-04
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-09
ERROR12 OK, 1 ERROR2026-06-08
OK3 OK2026-04-17

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.0

READMENoVignettesYes · 1 · dynamicNEWSYes · 67% structured · mentions 0.1.0Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 24includes a package overview page
Examples that run: 86%19 run in a plain check · 3 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 92%

Vignettes (1)

Economic Analysis of SWC Measures using swcEcon

How these are measured

Downloads

1.9K

CRAN downloads in the past year

Rank #18,788 · ~5/day · ~160/mo

Releases R versions

Daily download trend is not available in this view yet.

22930 days

70190 days

1.9K1 year

Compare downloads with other packages →

Also on37 r2u1 autocran

How downloads are counted

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Installing swcEcon adds no packages beyond those that come with R.

Depends (1)

R >= 4.1.0

Imports (4)

statsgraphicsgrDevicesutils

LinkingTo (0)

none

Suggests (4)

testthat knitr rmarkdown covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (1)

Sadikul Islam

Author, Maintainer since 0.1.0 (2026)

Releases (1)

R
R 4.6.0 released · 2026-04-24
0.1.0Latest
record
2026-04-16 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2026-04-16
Total releases: 1 / 1 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 4.1.0
Bundled data: 7.8 KB / 6 files
Download size: 59 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("swcEcon")

Format

Islam, S. (2026). swcEcon: Economic Analysis of Soil and Water Conservation Measures in Watersheds (Version 0.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.swcEcon

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for swcEcon version 0.1.0 [Data set]. HJJB, LLC. Data release v2026-10-24. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-24, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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