Estimating Tree Biomass Using Volume Tables

Volume tables are available for a large number of commercial tree species. A volume table is a two-way table, which gives the volume of a tree if its DBH and height are known. Once volume is known, biomass can be estimated using wood density of the species in question. Table 17.1 can be used to calculate the total biomass per plot and per hectare. The steps provided in Section 17.2.1 can also be followed for estimating the weight of trees and biomass per hectare. In this section, the volume of a tree is estimated using the volume tables. However, these tables provide only the merchantable volume; to convert it to total biomass, it is necessary to use biomass conversion and expansion factors available in literature (refer to Section

Table 17.1 A volume table for Cedrus deodara. (From Chaturvedi and Khanna 1982.)

Table 17.1 A volume table for Cedrus deodara. (From Chaturvedi and Khanna 1982.)

DBH (cm)

17

23

29

35

41

15

0.030

0.068

0.106

20

0.114

0.182

0.250

25

0.222

0.329

0.435

0.541

30

0.355

0.508

0.661

0.814

35

0.512

0.720

0.929

1.137

1 .345

40

0.692

0.965

1.237

1.509

1.782

45

0.897

1.242

1.586

1.931

2.276

50

1.552

1.977

2.403

2.828

55

1.894

2.409

2.924

3.438

60

2.269

2.882

3.494

4.107

65

2.677

3.396

4.115

4.834

70

3.117

3.951

4.785

5.619

75

4.547

5.504

6.462

80

5.185

6.274

7.363

85

5.863

7.092

8.322

90

6.583

7.961

9.339

95

7.343

8.879

10.415

100

8.145

9.847

11.549

17.1.6). The approach based on volume tables is being increasingly replaced by biomass equations method (Section 17.1.5).

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