Section 3.9
Overview of Parameters and Sources
| Parameter | Unit | Definition | Source type |
|---|---|---|---|
| Planted Area | ha (hectares) | The total area of forests planted each year as part of the project. | Project-specific data: satellite imagery and landcover classification model. |
| AGB Sequestration Rate | tC/ha/year | Annual rate of carbon accumulation in the above-ground biomass (AGB) of forests per hectare. | Default rates (Tier 1) are taken from the IPCC 2019 Refinement, Volume 4, Chapter 4 (Table 4.9 & 4.10), which classify rates by several factors such as domain, continent, and species. Climate and ecological classifications follow IPCC Chapter 4, Table 4.1 (FAO, 2001). For regional or site-specific data (Tier 2 and 3), values may be refined using peer-reviewed studies or field measurements. |
| BGB to AGB ratio | Ratio (unitless) | Proportion of carbon stored below-ground relative to above-ground biomass. | Default BGB-to-AGB ratios (Tier 1) are provided in the IPCC 2019 Refinement, Volume 4, Chapter 4 (Table 4.4), categorized by region and species. Site-specific or species-based ratios (Tier 2 and 3) are prioritized, leveraging data from peer-reviewed studies or field measurements. |
| C-to-CO₂ Conversion | Ratio (unitless) | Conversion factor to calculate equivalent CO₂ from stored carbon, using the molecular weight ratio. | IPCC 2006 Guidelines or standard conversion factor (44/12 = 3.67). |
| Affected Area | Hectares (ha) | The total area within the project site where activities may cause leakage. | Project site assessment, remote sensing data such as GIS mapping, land-use data, or historical satellite imagery. |
| % Activity Shift | Percentage (%) | The estimated percentage of an activity (e.g., firewood collection, agriculture) that will be displaced outside the project area. | Surveys, interviews with landowners, historical deforestation and land-use change data. |
| CO₂ Stock | tCO₂/ha | The carbon stock per hectare in biomass (tree biomass in forests or shrubs) in the area where displacement occurs. | National forest inventories, IPCC guidelines, peer-reviewed literature, or host-country datasets on carbon stocks. |