20190714 19210000 1.0 TRUE Soil Erosion Index 0-6in The Soil Erosion Index maps provide users with a visual interpretation of how susceptible a given soil type is to water erosion. Soil Erosion Index 0”-6” assesses how susceptible a given soil type is to water erosion on the surface with the top horizons intact. United States Department of Agriculture - Natural Resources Conservation Service, State of Rhode Island, RIGIS.