Technic features (WRB 2022)

Tests for any of three WRB 2022 alternative qualifying conditions for Technosols:

1. Artefacts >= artefacts_min_pct (default 20%) by volume within the upper max_top_cm (default 100 cm).

2. A continuous geomembrane (geomembrane_present == TRUE) within the upper 100 cm.

3. Technic hard material (concrete, asphalt, mine spoil) with technic_hardmaterial_pct >= hardmaterial_min_pct (default 95%) at the surface (top_cm <= hardmaterial_max_top_cm, default 5).

Either path qualifies.

Usage

technic_features(
  pedon,
  artefacts_min_pct = 20,
  max_top_cm = 100,
  hardmaterial_min_pct = 95,
  hardmaterial_max_top_cm = 5
)

Arguments

pedon

A PedonRecord.

artefacts_min_pct

Minimum artefact percent (default 20).

max_top_cm

Maximum top depth (cm) for the artefact and geomembrane paths (default 100).

hardmaterial_min_pct

Minimum hard-material coverage (%) for the technic-hard-material path (default 95).

hardmaterial_max_top_cm

Surface depth window (cm) for the technic-hard-material path (default 5).

Value

A DiagnosticResult.

References

IUSS Working Group WRB (2022), Chapter 5, Technosols.