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For the purpose of the Statewide Wetlands Inventory, DSL has restricted soil polygons displayed in the following manner.
The Predominantly Hydric Soil Map Units layer is created from an NRCS generated combined SSURGO/STATSGO dataset for Oregon. The Predominantly Hydric Soil Map Units layer displays all map units where “Percent Hydric” (hydclprs attribute) entry is greater than 50 percent. This shows map units with over 50 percent soil components meeting NRCS hydric criteria. These areas do not show where wetlands are, but where most soil components tend to be saturated, inundated or flooded for longer periods of time, thus increasing the potential that wetlands may develop in these areas. This layer is provided as a screening flag for those areas where wetland mapping may be lacking, incomplete or inaccurate. In all cases actual field conditions determine the presence and extent of wetlands.
This dataset can be downloaded from the Oregon Dept. of Administrative Services Geospatial Enterprise Office at: https://spatialdata.oregonexplorer.info/geoportal/search;q=*soils*
For more information go to NRCS Web Soil Survey Home: https://websoilsurvey.nrcs.usda.gov/app/HomePage.htm. |