HAND sketch (lab / demoted)

Lab geometric sketch — not for EM briefings, not readiness, not official inundation.

Flood evaluation surface — Flood COP, Operator PWA, and authorized EOC flood job tools only. Parallel SA modules are hidden on this host.

← Job tools · Flood COP · Site chemung_basin_ny · Lab product — does not change flood readiness.

Lab · demoted Not recommended for briefings or COP decisions. LAB / DEMOTTED — Chemung Basin HAND sketch (height-above-nearest-drainage). Geometric illustration only — not a hydraulic model, not recommended for EM briefings. Not FEMA regulatory floodplain, not NWS official inundation, not IPAWS, and not a driver of EWS flood readiness. Prefer Flood COP gauges, MARFC, and practice replay.
HAND is demoted to lab use. It fills low ground from a planar water-surface assumption relative to drainage — it does not route flow or match multi-reach peaks. Prefer Flood COP (gauges, MARFC, local impacts, practice).
Evaluation desk…