Blue Carbon Financing of Mangrove Conservation in the Abidjan Convention Region: A Feasibility Study

The Gambia

51,911

Mangrove area – year 0

343.40

C density top m of soil (Mg/ha)

85.40

C density of above + below ground biomass (Mg/ha)

$269

Above ground land value (US$/ha)

Years (end of)

Present value

1

2

3

20

51,548

51,184

50,826

45,105

Area of Blue Carbon (ha)

363

358

356

316

Area lost (ha) @0.7%/yr

124,784

123,037

122,175

108,423

Soil carbon exposed (Mg)

6,239

12,391

18,500

116,044

Soil carbon cumulative loss (Mg)

31,032

30,598

30,384

26,964

Biomass carbon lost (Mg)

37,272

42,989

48,884

143,008

Total C emitted (Mg)

37,958

43,666

49,556

143,605

Carbon benefit of conservation (Mg)

$11,372,625

$113,875

$130,998

$148,668

$430,814

C value at US$ 3/tCO 2 e, 5%

$18,954,374

$189,792

$218,331

$247,780

$718,024

C value at US$ 5/tCO 2 e, 5%

$8,435,619

$113,875

$130,998

$148,668

$430,814

C value at US$ 3/tCO 2 e, 8%

$14,059,366

$189,792

$218,331

$247,780

$718,024

C value at US$ 5/tCO 2 e, 8%

$144,992

$9,448

$9,679

$9,972

$14,652

Cost to conserve ($25/ha estab., US$ 1/yr), 5%

$1,257,734

$86,847

$88,175

$90,083

$120,560

Cost to conserve ($232/ha estab., US$ 7/yr), 5%

$111,870

$9,448

$9,679

$9,972

$14,652

Cost to conserve ($25/ha estab., US$ 1/yr), 8%

$975,551

$86,847

$88,175

$90,083

$120,560

Cost to conserve ($232/ha estab., US$ 7/yr), 8%

$10,369,309

$97,857

$194,345

$290,157

$1,820,079

Opportunity cost, 5%

$7,394,268

$97,857

$194,345

$290,157

$1,820,079

Opportunity cost, 8%

High carbon price

Low carbon price

Net Benefit of Conservation (million US$)

8%

8%

5%

5%

$6.6

$0.9

$8.4

$0.9

Low cost of conservation

$5.7

$0.1

$7.3

($0.3)

High cost of conservation

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