Section 3.9
Overview of Parameters and Sources
| Parameter | Unit | Definition | Source type |
|---|---|---|---|
| Planted Area | ha (hectares) | The total area of mangroves 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 mangroves per hectare. | Default rates (Tier 1) are taken from the IPCC 2013 Wetlands Supplement (Table 4.4) and the 2006 IPCC Guidelines (Chapter 4, Table 4.10), which classify rates by climate domain, region, 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 2013 Wetlands Supplement (Table 4.5), categorized by region and mangrove species. Site-specific or species-based ratios (Tier 2 and 3) are prioritized, leveraging data from peer-reviewed studies or field measurements. |
| SOC Sequestration Rate | tC/ha/year | Annual rate of carbon storage in soil organic carbon (SOC) due to the project. | Default SOC sequestration rates (Tier 1) are provided in the IPCC 2013 Wetlands Supplement (Table 4.12), which includes annual emission factors for rewetting organic and mineral soils. For Tier 2 and Tier 3, project-specific measurements or peer-reviewed studies are used. |
| 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 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 in the area where displacement occurs. | National inventories, IPCC guidelines, peer-reviewed literature, or host-country datasets on carbon stocks. |