Equations / Aboveground biomass
Lowland Dipterocarp forest, mixed species, DBH and wood density
Aboveground biomassMixed species of lowland Dipterocarp forestIndonesianaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 1)
ln(TAGB) = c + αln(DBH) + βln(WD) c −0.744 ... α 2.188 ... β 0.832 ... 0.970 0.303 26.51 1.047
In this library's units, ready to compute (kg)
Aboveground biomass = 1.047 * exp(-0.744 + 2.188 * ln(D) + 0.832 * ln(rho))D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
ln-ln OLS; the authors back-transform with the correction factor (CF) listed in Table 1, which is applied here. Intercepts are negative in the printed table (checked on the rendered page; text extraction drops the sign). DBH measured at 1.30 m or above buttresses.
Source
doi:10.1016/j.foreco.2009.01.027 · Open access · copy we read
The data were collected in lowland mixed Dipterocarp forests in East Kalimantan, Indonesia.
TAGB; total above-ground biomass based on dry weight (kg/tree), DBH: diameter at breast height (cm)
- Trees measured
- 122
- DBH range
- 6–200 cm
- R²
- 0.97
- Residual SE
- 0.303
- Correction factor
- 1.047 (applied)
- Method
- OLS on ln-transformed data, adjusted r2
- Where
- Lowland mixed Dipterocarp forest, East Kalimantan, Indonesia
- Last checked
- 2026-11-01
Calculate
554.9
Aboveground biomass (kg)
260.8
Carbon (kg), ×0.47
956.2
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 | 554.9 | 554.9 | Computed from the printed form hand-computed from the published form |
| D = 80, rho = 0.6 | 4,745 | 4,745 | Computed from the printed form hand-computed from the published form |
Related
- Lowland Dipterocarp forest, mixed species, DBH only · Basuki et al. 2009 · DBH
- Dipterocarpus spp., DBH only · same paper · Aboveground biomass
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