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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.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.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.markdown = FALSE in DESCRIPTION – plain Rd syntax
throughout.These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.