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Table 6 Comparison of PCC-VC ashfall impacts to agricultural areas with existing damage state scales

From: Impacts to agriculture and critical infrastructure in Argentina after ashfall from the 2011 eruption of the Cordón Caulle volcanic complex: an assessment of published damage and function thresholds

Affected area Ash thick-ness (mm) Damage State based on thickness (Wilson et al. 2009)a Damage state description Damage state based on observations Justification of assigned damage state Damage state based on thickness (Jenkins et al. 2014) Damage state description Damage state based on observations Justification of assigned damage state
Nahuel Huapi National Park 250–400 >150mm category New soil formation needs to occur (up to decades) 25–150 category Whilst ash did need to be incorporated into soil this occurred over months rather than years/decades 5 Major rehabilitation required/retirement of land 2 No land was retired and very little rehabilitation work was undertaken (due in part to it being a national park)
Steppe Region (incl. Jacobacci) 40–60 25–150 category Up to 5 years recovery time 25–150 category ~ 2–3 Minor to major productivity loss (remediation required) 3 Losses were >50% across the region, however due to lack of resources very little remediation took place
  1. a Not suggested as true damage states, rather guidelines for what impacts to expect