Fig. 6
From: Framework for developing volcanic fragility and vulnerability functions for critical infrastructure
Water supply treatment plant ash impact histogram and fragility functions. a Histogram of available post-eruption impact data classified by IS for 1–10, 11–40, and 41–150 mm tephra thickness bins. b Derived fragility functions for water supply treatment plant sites (excluding the influence of tephra deposited in water sources or transported through pipe networks) showing probability of equalling or exceeding each IS vs tephra thickness