Marklund biomass with SweTimber#

Notebook Objectives#

Combine SweTimber with Marklund biomass equations for practical biomass calculations.
Provide runnable, copy-safe snippets that work in the docs build environment.

Prerequisites#

Python environment with pyforestry installed from this repository.
Execute cells in order; random components should use fixed seeds where shown.

Sources#

Marklund (1988) biomass equations in pyforestry.sweden.biomass.marklund_1988.

This notebook demonstrates how to combine the SweTimber helper class with the Marklund_1988 biomass wrapper.

[1]:

from pyforestry.sweden.biomass import Marklund_1988
from pyforestry.sweden.timber import SweTimber

[2]:

# Construct a SweTimber instance
pine = SweTimber(
    species="pinus sylvestris",
    diameter_cm=25,
    height_m=15,
    double_bark_mm=15,
    crown_base_height_m=7,
)

[3]:

# Calculate biomass for all components
Marklund_1988(pine)

[3]:

{'stem': 138.17212824703805,
 'stem_wood': 125.74493189426362,
 'stem_bark': 9.668554551395248,
 'living_branches': 44.23163558559602,
 'needles': 10.631787243731852,
 'dead_branches': 4.462538650002918,
 'stump_root_system': 61.30504637588977,
 'stump': 18.903791303173385,
 'coarse_roots': 30.904626028327577,
 'fine_roots': 12.24355896580103}

[4]:

# Retrieve only the stem biomass
Marklund_1988(pine, component="stem")

[4]:

138.17212824703805