The surficial units present on each geological formation were then defined and assigned a vadose zone rank that reflected the possible influence of the underlying bedrock on the composition and properties of the surficial unit. In many cases, the vadose zone includes both bedrock and the overlying surficial materials, requiring a composite rank that reflects both the bedrock rank and the surficial materials rank. A series of formulas were developed to allow for the generation of the composite rankings. Surficial Materials Vadose Rank. All polygons are fully attributed.
All polygons are closed and each polygon has one unique label.
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