Equations / Stem biomass
Sonneratia alba stem biomass, power model (D)
Stem biomassSonneratia albaIndonesianaturalRead from the original paper
© Oleg Kosterin · CC BY · iNaturalistEquation
As printed (Table 3, Power row)
Power B = 0.036D^2.503 96.8% 0.131
In this library's units, ready to compute (kg)
Stem biomass = 0.036 * D^2.503D- Diameter at breast height (1.3 m), cm
Stand origin is not stated in the paper; classified natural from its reference to natural forest stands. Fitted on 8 of the 14 felled trees (the other 6 were held out for validation); the paper prints no DBH range for the fitting trees.
Source
doi:10.29303/jppipa.v12i5.15100 · Open access · copy we read
A total of 14 trees were felled to serve as measurement samples: 8 for model development and 6 for model validation.
96.8%
- Trees measured
- 8
- R²
- 0.968
- Method
- power model B = a D^b
- Where
- Tanah Merah Mangrove Forest, Kupang, East Nusa Tenggara
- Last checked
- 2026-11-02
Calculate
18.09
Stem biomass (kg)
8.503
Carbon (kg), ×0.47
31.18
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 = 12 | 18.1 | 18.1 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 18 | 49.9 | 49.9 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 26 | 125.3 | 125.3 | Computed from the printed form computed from the published form (coefficients as printed) |
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