urban-green-infrastructure-utac

GenesisAeon Package 108 — urban green infrastructure hydrology. Companion to landscape-restoration-hydrology-utac (P107): the urban physical setting rather than the rural/riparian one. Deliberately has no UTAC/CREP/AFET bridge — see DISCLAIMER.md.

A caught statistic

The source dialogue for this package cited "Nature 2026: sealing " reduces groundwater recharge 30-50%, r=-0.8971." Despite extensive searching, neither figure could be independently verified against any real paper — a suspiciously precise, four-decimal correlation coefficient with no findable source is a classic fabrication/ misattribution signature. The underlying mechanism (sealing reduces groundwater recharge) is real; this package uses a real, confirmed, more modest figure instead (Grischek et al. 1996, Dresden: -23%). See DISCLAIMER.md for the full story.

What's real here

• Grischek et al. (1996) — surface sealing reduced groundwater recharge by 23% in Dresden, Germany. A real, confirmed, modest figure — used deliberately in place of the unverifiable "30-50%, r=-0.8971" claim above.
• Zheng, Zou, Lounsbury, Wang & Wang (2021, Resources, Conservation and Recycling) — a real global synthesis: 2,375 samples from 75 studies across 21 countries (2005–2020), average 62% per-event rainfall retention for green roofs (0–100% range, driven by rainfall intensity, substrate depth, coverage, climate, vegetation, season).
• Gregoire & Clausen (2011) — an earlier, independent meta-analysis of extensive green roofs specifically: 34–69% retention, average 56% — converges closely with Zheng et al.'s later, larger synthesis. independent_sources_agree_roughly() returns True.

Quickstart

pip install urban-green-infrastructure-utac

from urban_green_infrastructure_utac import (
    dresden_recharge_reduction_pct,
    SEALING_CORRECTION_NOTE,
    GLOBAL_SYNTHESIS,
    EXTENSIVE_ROOF_META_ANALYSIS,
    independent_sources_agree_roughly,
)

print(dresden_recharge_reduction_pct())          # 23.0
print(SEALING_CORRECTION_NOTE)

print(GLOBAL_SYNTHESIS.avg_retention_pct)         # 62.0
print(EXTENSIVE_ROOF_META_ANALYSIS.avg_retention_pct)  # 56.0
print(independent_sources_agree_roughly())        # True

Development

pip install -e ".[dev]"
pre-commit install
ruff check src tests
mypy src
pytest

Citation

See CITATION.cff and .zenodo.json.