Supplementary.Material.1.xlsxExcel 2007 spreadsheet441KTable S1. (A) List of USGS gauges defined as reference, nonreference, and pre-dam regulation used in the hydrologic classifications, their assigned classes, and uncertainty. (B) The 110 hydrologic metrics used in the classification and (C) 52 landscape variables, their descriptions, and their importance in random forest models are also provided.
Supplementary.Material.2.xlsxExcel 2007 spreadsheet44KTable S2. Results of the principal components analysis (PCA) including (A) eigenvalues and variation explained by principal components, (B) hydrologic variable loadings on the top four principal components, and (C) dimensionality represented by the reference, nonreference, and pre-dam regulation gauges in PCA space.
Supplementary.Material.3.docxWord 2007 document777KFigure S3. Mosaic plots comparing the degree of associations among Poff (1996) hydrologic classes and updated hydrologic classes (this study). Pearson's residuals show the degree of positive or negative association among classes. Updated class with the highest association with each Poff class is shown in white box.

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