CCART Number (v1.0): Climate Adjustment Factor for Flood Resilience Design — India

CCART Number (v1.0): Climate Adjustment Factor for Flood‑Resilient Infrastructure Design in India The CCART Number is a single, defensible climate adjustment factor that allows engineers, planners, and researchers to design infrastructure for the future climate (2027–2100) rather than relying solely on historical rainfall. It is defined as: Future worst‑case flood hazard (2027–2100) divided by Historical worst‑case flood hazard (1995–2024) This ratio provides a location‑specific multiplier that can be applied to historical design standards to obtain climate‑adjusted flood‑resilience thresholds. A CCART Number of 2.0 means future extreme floods may be twice as severe as the historical worst case; values of 10–20 indicate regions where climate change may amplify extreme flood hazard by an order of magnitude.