| Discount rate (%) | Cost (106 USD) | Benefit (106 USD) | Net benefit (106 USD) | Remarks | |
|---|---|---|---|---|---|
| - Total area of the Ganghwa tidal flat: 35,300 ha | - Time period: 25 years | ||||
| - Area restored: 3,530 ha (10% of the Ganghwa tidal flat) | - Carbon price: $417 /t CO2 e | ||||
| CWPA establishment & management | 2 | 68.5 | 6,297.2 | 6,228.7 | - Annual monitoring cost included |
| 4.5 | 52.1 | 5,101.7 | 5,049.6 | ||
| 7 | 41.0 | 4,249.9 | 4,208.9 | ||
| Coastal wetland restoration | 2 | 19.4 | 229.9 | 210.5 | - Annual monitoring cost excluded |
| 4.5 | 174.6 | 155.2 | |||
| 7 | 137.2 | 117.8 | |||
| Total | 2 | 87.9 | 6,527.1 | 6,439.2 | |
| 4.5 | 71.5 | 5,276.3 | 5,204.8 | ||
| 7 | 60.4 | 4,387.1 | 4,326.7 | ||