Model (IPCC Tier 1, restoration)

Two pools accrue once a site is restored. Soil accumulates once tidal exchange returns, so hydrology rather than planting starts the clock. Biomass grows from each planting cohort along a Chapman–Richards curve, scaled by survival. Existing soil carbon inside each footprint is shown as safeguarded stock and is never counted as a removal.

What comes from FieldDoc and what is assumed

• From FieldDoc: site footprints and areas, red and black mangrove transplant counts, and blue carbon core counts.
• Assumed until reported: sites with transplants are treated as hydrologically restored across their footprint from April 2023, the NFWF groundbreaking. Planted area is transplants divided by planting density. Survival uses the default below.
• Not counted: sites with no transplants reported accrue nothing yet.

Parameters (edit to re-run)

Low and high bounds use the soil-rate range and ±30% on biomass. Natural recruitment is excluded to stay conservative. No leakage, buffer, or baseline-emission deductions are applied, so a Verra VM0033 or Plan Vivo estimate would be lower than this gross figure.

What raises confidence, and what certification needs

Where this lives in FieldDoc

Each item maps to an activity metric or a model input on the FieldDoc activity record. As soil-core and plot data arrive, the atlas swaps Tier 1 defaults for site-measured values and relabels the estimate.