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. 2018 Mar 26;115(15):3810–3815. doi: 10.1073/pnas.1719275115

Fig. 1.

Fig. 1.

Water body frequency maps and water body areas using different frequency thresholds in the CONUS. (A) Annual water body frequency map in 2016 and (B) its zoom-in view of eastern Oklahoma. (C) A 33-y water body frequency map during 1984–2016 and (D) its zoom-in view of eastern Oklahoma. (E) Total water body area of all pixels within CONUS with water body frequencies >0, ≥0.05, ≥0.1, ≥0.15, ≥0.35, ≥0.55, and ≥0.75, respectively, in our datasets; the permanent water body areas from the JRC dataset during 1984–2015; and the water body area from NLCD in 2001, 2006, and 2011. Water body frequency is the ratio of water body observations to total good observations in a year (A) or all 33 y during 1984–2016 (C).