Carbon Credits (Carbon Farming Initiative—Tidal Restoration of Blue Carbon Ecosystems) Methodology Determination 2022
30Calculating sequestration abatement for a project area for a reporting period
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30 Calculating sequestration abatement for a project area for a reporting period
(1) The carbon stock change, in tonnes CO2-e, for a project area for reporting period r, Cr, is worked out using the following equation:
| View image in the official source<br> | equation 3 |
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where:
CPi,r is the carbon stock for the ith CEA in the project area at the end of the reporting period, in tonnes CO2-e, worked out using equation 4.
CPi,r–1 is, subject to subsection (2):
(a) if the reporting period is the first reporting period for the project area under this determination—equal to the baseline carbon stock for the ith CEA in the project area; or
(b) otherwise—equal to the carbon stock for the ith CEA in the project area at the end of reporting period r–1 that immediately preceded the reporting period r, in tonnes CO2-e, worked out for the purposes of determining the net abatement amount for that preceding reporting period.
Note: The amount CPi,r–1 accounts for carbon stock that has been sequestered in the project area as the result of tidal introduction before the reporting period r, and that has been reported on in a previous offsets report.
i is a CEA in the project area.
Calculation of carbon stock for ith CEA
(2) The carbon stock for the ith CEA in a project area at the end of reporting period r, CPi,r, in tonnes CO2-e, is worked out using the following equation:
- equation 4
where:
Cs,i,r is the C mass of soil, in tonnes CO2-e per hectare, for the ith CEA in the project area in the reporting period, at the end of the reporting period, determined using BlueCAM.
Cv,i,r is the C mass of vegetation in above and below ground live biomass, in tonnes CO2‑e per hectare, for the ith CEA in the project area in the reporting period, at the end of the reporting period, determined using BlueCAM.
View image in the official source is the avoided accumulation of soil carbon in the baseline, in tonnes CO2-e per hectare, for the ith CEA in the project area, determined using BlueCAM.
Cl,i.r is the avoided loss of soil carbon in the baseline, in tonnes CO2-e per hectare, for the ith CEA in the project area, determined using BlueCAM.
ACEAi,r is the area, in hectares, of the ith CEA in the project area.