cdmAmsIIIf implements the Clean Development Mechanism (CDM) small-scale methodology AMS-III.F Avoidance of methane emissions through composting. The package follows tidyverse design principles and exposes equation-level helpers, applicability diagnostics, and workflow orchestration utilities to reproduce emission reduction estimates for composting facilities.
# install.packages("devtools")
devtools::install_github("independent-impact/GHG_methodologies/cdmAmsIIIf")
library(cdmAmsIIIf)
library(dplyr)
simulated <- simulate_ams_iiif_dataset(n_sites = 2, n_periods = 3, seed = 2024)
applicability <- check_applicability_feedstock_management_iiif(simulated$applicability, group_cols = "site_id") |>
left_join(
check_applicability_composting_practices_iiif(simulated$applicability, group_cols = "site_id"),
by = "site_id"
) |>
left_join(
check_applicability_monitoring_framework_iiif(simulated$applicability, group_cols = "site_id"),
by = "site_id"
)
reductions <- estimate_emission_reductions_ams_iiif(
baseline_data = simulated$baseline,
project_data = simulated$project,
leakage_data = simulated$leakage,
group_cols = "site_id",
baseline_args = list(oxidation_factor_col = "baseline_oxidation_fraction"),
project_args = list(compost_oxidation_col = "compost_oxidation_fraction")
)
applicability
reductionsFor a more detailed walk-through see the vignette in vignettes/cdmAmsIIIf-methodology.Rmd.
Projects must satisfy core AMS-III.F requirements before emission reductions can be claimed. Use the package helpers to document each criterion:
check_applicability_feedstock_management_iiif() – confirms waste types are eligible, source segregated, and within contamination limits.check_applicability_composting_practices_iiif() – validates that composting systems maintain aerobic conditions, retention time, and leachate management.check_applicability_monitoring_framework_iiif() – verifies monitoring covers organic content, temperature, and moisture checks.cdmAmsIIIf translates the numbered equations from AMS-III.F into composable R functions:
| Equation | Function | Description |
|---|---|---|
| (1) | calculate_baseline_methane_emissions_iiif() |
Estimates baseline methane generation from unmanaged disposal of organic waste. |
| (2) | calculate_project_emissions_iiif() |
Converts controlled composting performance and energy inputs into project emissions. |
| (3) | calculate_leakage_emissions_iiif() |
Aggregates transport, residual waste treatment, and fertiliser displacement leakage. |
| (4) | calculate_emission_reductions_iiif() |
Determines net emission reductions after project and leakage deductions. |
The meta-wrapper estimate_emission_reductions_ams_iiif() chains these helpers together for tidyverse-friendly datasets.
aggregate_monitoring_periods_iiif() summarises measured data across reporting periods while preserving entity identifiers.simulate_ams_iiif_dataset() generates example datasets with monitoring metadata to support tests, demos, and onboarding.