Equations / Aboveground biomass
Dipterocarpus spp., DBH only
Aboveground biomassDipterocarpus · DipterocarpaceaeIndonesianaturalRead from the original paper
Covers the whole genus
Equation
As printed (Table 1)
Dipterocarpus 20 ln(TAGB) = c + αln(DBH) c −1.232 ... α 2.178 ... 0.989 0.210 18.65 1.022
In this library's units, ready to compute (kg)
Aboveground biomass = 1.022 * exp(-1.232 + 2.178 * ln(D))D- Diameter at breast height (1.3 m), cm
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
- 20
- R²
- 0.989
- Residual SE
- 0.21
- Correction factor
- 1.022 (applied)
- Method
- OLS on ln-transformed data, adjusted r2
- Where
- Lowland mixed Dipterocarp forest, East Kalimantan, Indonesia
- Last checked
- 2026-11-01
Calculate
492
Aboveground biomass (kg)
231
Carbon (kg), ×0.47
847
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 | 492 | 492 | Computed from the printed form hand-computed from the published form |
| D = 80 | 4,162 | 4,162 | Computed from the printed form hand-computed from the published form |
Related
- Dipterocarpus genus, Vietnam, AGB from D (D1, Eq. 18) · Huy et al. 2016 · DBH
- Lowland Dipterocarp forest, mixed species, DBH and wood density · same paper · Aboveground biomass
- Lowland Dipterocarp forest, mixed species, DBH only · same paper · Aboveground biomass
- Shorea spp., DBH only · same paper · Aboveground biomass