In general, four types of assessment methods for vulnerability are empolyed:

  • Index methods such as DRASTIC (Foster at al., 2013)
  • Statistical methods (e. g. logistic regression)
  • Process-based groundwater models (e. g. MODFLOW; Sonnenborg et al. 2015)
  • Cognitive Site-specific Concept for Assessment of Nitrate Vulnerability of Aquifers (SCANVA; Hansen et al. 2016)