Confluence Retirement

In an effort to consolidate USGS hosted Wikis, myUSGS’ Confluence service is scheduled for retirement on January 27th, 2023. The official USGS Wiki and collaboration space is now SharePoint. Please migrate existing spaces and content to the SharePoint platform and remove it from Confluence at your earliest convenience. If you need any additional information or have any concerns about this change, please contact Thank you for your prompt attention to this matter.

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 Although some data on the national scale exists in tabular form, such as Ag Census and NRI, many researchers struggle with the limitations of this content.  Perceived limitations include methods of data collection, precision, and initial definitions of variables used in analysis (for example, what constitutes poorly drained soils) and the identification of the differences between types of drainage (surface versus tiles).  Because of these limitations, defining tile drains using spatial analysis is even more difficult than probabilistic methods (but that do not give as precise location). 

Current Work