feat(economics): cost-of-carbon-floor card in the Faustmann tab#76
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holoros wants to merge 2 commits into
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feat(economics): cost-of-carbon-floor card in the Faustmann tab#76holoros wants to merge 2 commits into
holoros wants to merge 2 commits into
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… scenarios New 'Permanence / risk' tab. Contrasts the passive no-harvest reserve against the disturbance-exposed and mortality-stressed reserve buckets already shipped in the v1.4 API, as the cross-engine ensemble median. Surfaces per-state reversal-risk: end-of-horizon shortfall vs the passive reserve, peak-to-end drawdown (does the reserve become a net source), a graduated risk verdict, scorecards, and a gap-shaded trajectory chart. Directly addresses the dimension single-model reversal tools center on, but on PERSEUS's multi-model footing. Data already present (ME/GA/IN/MN + focal states); graceful empty state where the buckets are absent. Build verified; reversal math sanity-checked against ME/GA/IN.
Turns the existing Faustmann carbon-floor data into the number a landowner actually wants: how much soil expectation value a carbon floor forgoes, how much longer the rotation runs, and how much extra standing biomass is carried — plus an implied within-model $/ac-per-Mg/ha ratio (clearly labeled, not a market carbon price). All from data already in faustmann_rotation.json. Build verified.
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What
Enriches the Faustmann tab's carbon-floor note into a Cost of the carbon floor card. For the selected owner/treatment it contrasts no-floor vs carbon-floor on three axes — optimal rotation (yr), soil expectation value ($/ac), and standing biomass (Mg/ha) — and shows the SEV forgone ($ and %) plus an implied, clearly-labeled within-model $/ac-per-Mg/ha tradeoff ratio.
Why
NPV/economics were unmasked on main on 6 June, and this is the piece that makes the carbon-vs-revenue tradeoff legible to a landowner audience (the Apollo direction) without leaving the research framing. Example (ME): a carbon floor pushes harvested northern-forest rotation 36 → 119 yr and forgoes ~93% of soil expectation value to carry +24 Mg/ha standing biomass.
Scope / risk
src/FaustmannRotation.jsx. Replaces the existing one-line floor note with the card; reuses the same filteredrows. No data or schema change.npm run buildpasses; numbers sanity-checked against ME.Opened for review — not auto-merged.