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The data for the Buffering America’s Waterways Tool was created by aggregating the National Forests to Faucets 2.0 Assessment watershed importance data (IMP) with data on the percent of the riparian area in cropland (% cropland) which was calculated for this analysis.
By combining importance to surface drinking water data with the percent riparian area that is cropland, the tool identifies riparian area in watersheds important to surface drinking water that have greatest opportunity for improving water quality by establishing perennial vegetation between croplands and water bodies.
The resulting data, or Riparian Area Opportunity, is defined as:
Riparian Area Opportunity = (IMP x %cropland)/100
where,
IMP = Index of Importance to Surface Drinking Water
% cropland = Percent cropland in the Riparian Area (10 m, 30 m, or variable width)
The result is presented in percentiles (0-100).
Note: Due to the resolution of the data, the tool should only be used with other evaluation methods to prescribe practices for specific sites. Pasture land was not included in this analysis due to insufficient high resolution data. Future analysis may address pasture.