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This dataset estimates the pollution sensitivity of near-surface materials (soil, bedrock, aquifer) from the transmission time of water through 3 feet of soil and 7 feet of surficial geologic material, to a depth of 10 feet from the land surface. This layer is used to derive the watershed health index score that shares the same name. Sensitivity ratings range from high (indicating coarse-grained material such as sand) to ultra-low (indicating fine-grained material such as silt or clay), as well as categories for special near-surface conditions (karst, bedrock, etc.).
Data Source: The source data and metadata are available for download through the Minnesota Geocommons website. |