A Study of the DRASTIC Methodology with Emphasis on Swedish Conditions

摘要: A study of the DRASTIC classification methodology, with special emphasis on Swedish conditions, indicated both favorable and unfavorable properties system. The showed that fairly large number parameters (seven) correlations between these give some advantageous statistical properties. comparison found to determine effects ground-water quality in surficial aquifers southwestern Sweden from acid deposition a good agreement two parameter sets; thus selection is relevant for general vulnerability assessments Sweden. concept hydrogeologic settings possibility trace results backwards system excellent, but qualitative weight functions result simplistic index unclear meaning less useful distinctive than desired. tends overestimate porous media compared fractured media; rating tables need be revised so more given specific surface effective porosity, hydraulic conductivity. applicability would enhanced risk misuse reduced if were clearly directed toward scientifically defined factors, e.g. sorption capacity, travel time, dilution.