Trailing-suction hopper dredgers (TSHD) and cutter-suction dredgers (CSD). Outside CII scope; benchmarked per m³ of material dredged.
Formula
$$ \text{CO}_2^\text{year} = \sum_j F_j \cdot C_{f,j} $$$$ \\text{Intensity} = \\frac{\\text{CO}_2 \\cdot 1000}{V_\\text{dredged}} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F_j$ | Mass of fuel $j$ | t | bunker log |
| $C_{f,j}$ | CO₂ factor | t CO₂ / t fuel | MEPC.364(79) |
| $Bench (Volume dredged / year)$ | operational benchmark | m³ | operations log |
| $d_\text{op}$ | Operating days | d | operations log |
CEDA (Central Dredging Association) publishes fuel-intensity benchmarks: TSHDs 0.5-2.5 kg CO₂/m³ depending on pump distance and material density.
Sources
- CEDA - Central Dredging Association fuel benchmarks.
- IMO MEPC.364(79) - Cf conversion factors.