Liquidambar styraciflua / Branch biomass
NSVB sweetgum, Subtropical Division (230): branch biomass (wood and bark), Schumacher-Hall model (Eq. 1)
Branch biomassLiquidambar styraciflua · AltingiaceaeUnited StatesRead from the original paper
© Douglas Goldman · CC BY-SA · iNaturalistEquation
As printed (Table S7a (Table S7a_branch_biomass_coefs_spcd.csv, WO-GTR-104-Supp1), columns SPCD,DIVISION,STDORGCD,model,a,b,b1,c)
611,230,,1,0.103333948,3.167562399,,-0.162651127
In this library's units, ready to compute (kg)
Branch biomass = 0.45359237 * 0.103333948 * (D/2.54)^3.167562399 * (H/0.3048)^(-0.162651127)D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
DBH is measured at 4.5 ft (1.37 m). Paper units: in, ft, lb; expression converts D cm→in (/2.54), H m→ft (/0.3048) and lb→kg (×0.45359237). n and the DBH range are from the scorecard for BRT_WDBK_DW_TOT in 230 (table S19).
Source
doi:10.2737/WO-GTR-104 · Open access · copy we read
yi = a × Di^b × Hi^c + εi
Di is diameter (inches) at breast height (4.5 feet), Hi is total tree height (feet)
units for volume and biomass predictions are cubic feet and pounds, respectively
611,sweetgum,N,Liquidambar,styraciflua,,,Liquidambar styraciflua
total branch wood and bark biomass
"Branches","BRT_WDBK_DW_TOT","611","230","SUBTROPICAL_DIVISION",769,7.12522756827048,1,32.5
key modeling statistics such as sample sizes (n), tree diameter distributions (minimum, mean, and maximum)
- Trees measured
- 769
- DBH range
- 2.54–82.55 cm
- Method
- NSVB Schumacher-Hall model (Eq. 1), coefficients for SPCD 611 in DIVISION 230 from table S7a; fitted with weighted regression to destructively sampled trees
- Where
- FIA ecodivision Subtropical Division (230), mapped in GTR fig. 1
- Last checked
- 2026-11-03
Calculate
Height from
61.5
Branch biomass (kg)
28.9
Carbon (kg), ×0.47
106
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 = 30.5, H = 21.3 | 61.5 | 61.5 | Computed from the printed form computed from the published form at D = 12 in, H = 70 ft, converted to cm, m and kg |
Related
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