Equations / Aboveground biomass
Kalimantan dipterocarp forest AGB, DBH and wood density (DG8)
Aboveground biomassMixed species of dipterocarp forest (80 species)IndonesianaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 2)
DG8 0.277 (D²G)^1.238
In this library's units, ready to compute (kg)
Aboveground biomass = 0.277 * (D^2 * rho)^1.238D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
Fitted by OLS on ln data; Table 2 reports fit after back-transformation with the REst ratio-estimator correction. The paper does not say explicitly whether that factor is folded into the printed power-form coefficient; used as printed. D at 1.3 m or 20 cm above buttress. G (wood density) in g/cm3.
Source
doi:10.1186/s40663-016-0087-2 · Open access
108 trees
- Trees measured
- 108
- DBH range
- up to 172 cm
- R²
- 0.924
- Method
- OLS on ln-transformed data, back-transformed (REst correction); adjusted r2 on kg scale
- Where
- Dipterocarp forests of East, Central and West Kalimantan (Malinau, Bulungan, Kapuas Hulu, Seruyan), Indonesia
- Last checked
- 2026-11-01
Calculate
669
Aboveground biomass (kg)
314
Carbon (kg), ×0.47
1,152
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 30, rho = 0.6 | 669 | 669 | Computed from the printed form hand-computed from the published form |
| D = 80, rho = 0.6 | 7,584 | 7,584 | Computed from the printed form hand-computed from the published form |
Related
- Kalimantan dipterocarp forest AGB, DBH only (D1) · Manuri et al. 2016 · DBH
- Kalimantan dipterocarp forest AGB, DBH, wood density and height (DGH9) · Manuri et al. 2016 · DBH + Wood density + Height
- Kalimantan dipterocarp forest AGB, DBH and height (DH3) · Manuri et al. 2016 · DBH + Height
- Kalimantan dipterocarp forest AGB, DBH only (D1) · same paper · Aboveground biomass
- Kalimantan dipterocarp forest AGB, DBH, wood density and height (DGH9) · same paper · Aboveground biomass
- Kalimantan dipterocarp forest AGB, DBH and height (DH3) · same paper · Aboveground biomass