xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx Revision History for U.S. Geological Survey Scientific Investigations Report 2017–5006 By Gretchen P. Oelsner, Lori A. Sprague, Jennifer C. Murphy, Robert E. Zuellig, Henry M. Johnson, Karen R. Ryberg, James A. Falcone, Edward G. Stets, Aldo V. Vecchia, Melissa L. Riskin, Laura A. De Cicco, Taylor J. Mills, and William H. Farmer Water-Quality Trends in the Nation's Rivers and Streams, 1972–2012—Data Preparation, Statistical Methods, and Trend Results ----------------------------------------------------- Posted online April 4, 2017 ----------------------------------------------------- Revised and reposted October 25, 2017 Changes in the percent per year numbers (slopes) are due to changing the transformation used in the analysis from common (base 10) logarithm to natural (base e) logarithm. Page 3, paragraph 4 – “common logarithm” was changed to “natural logarithm” Page 3, paragraph 4 – “allows for a percentage interpretation” was changed to “when multiplied by 100 gives a percentage” Page 4, paragraph 1 – “0.56 percent per year” was changed to “1.30 percent per year”; “0.55 percent per year” was changed to “-1.27 percent per year”; “0.6 percent per year” was changed to “1.38 percent per year”; “0.79 percent per year” was changed to “-1.83 percent per year”; “0.52 percent per year” was changed to “1.19 percent per year”; “0.64 percent per year” was changed to “-1.47 percent per year” Page 4, paragraph 2 – “0.48 percent per year” was changed to “1.10 percent per year”; “1.03 percent per year” was changed to “-2.38 percent per year”; “1.01 percent per year” was changed to “2.32 percent per year”; “1.31 percent per year” was changed to “-3.01 percent per year”; “0.64 percent per year” was changed to “1.47 percent per year”; “-0.84 percent per year” was changed to “-1.94 percent per year” Page 4, paragraph 3 – “0.97 percent per year” was changed to “2.23 percent per year”; “2.09 percent per year” was changed to “-4.80 percent per year”; “1.72 percent per year” was changed to “3.97 percent per year”; “-2.24 percent per year” was changed to “-5.15 percent per year”; “0.9 percent per year” was changed to “2.07 percent per year Page 5 – Figures 6–1 and 6–2 were replaced. Vertical scale was changed for these figures. Page 6, paragraph 1 – “1.61 percent per year” was changed to “-3.71 percent per year” Page 6, paragraph 2 – “4.1 percent per year” was changed to “9.43 percent per year”; “4.5 percent per year” was changed to “-10.35 percent per year”; “5.96 percent per year” was changed to “13.72 percent per year”; “-6.54 percent per year” was changed to “-15.06 percent per year”; “2.8 percent per year” was changed to “6.45 percent per year”; “-5.22 percent per year” was changed to “-12.02 percent per year” Page 6, paragraph 3 – “Of the 7,084 sites with full calibration periods, 7,017 sites match complete daily streamflow records. Summarizing across annual mean streamflows, annual maximum streamflows, and annual minimum 7-day mean streamflows, 5,390 sites (76.81 percent) had no significant change points in any of the three statistics. Of these sites, 4,783 sites also had no monotonic trends in any statistics, meaning that 68.16 percent of all sites had neither a significant change point nor a significant monotonic trend in any of the three statistics.” was replaced with the following text: “For this study, multiple water-quality parameters with different calibration periods may occur at a site and multiple sites may be paired with the same streamgage. Streamflow trends were run for 2,432 unique combinations of streamgage and water-quality calibration period, and the streamflow trend results of 2,413 of these streamgage-period pairings are presented here (Farmer and others, 2017). Summarizing across annual mean streamflows, annual maximum streamflows, and annual minimum 7-day mean streamflows, 75 percent of these pairings had no significant change points in any of the three statistics. Of these, an additional 1,574 pairings also had no significant monotonic trends in any of the statistics; thus, 65 percent of these pairings had neither a significant change point nor a significant monotonic trend in any of the three statistics.” Page 6, paragraph 4 – “76 sites” was changed to “72 sites” Page 6, paragraph 5 – “-3.55 percent per year” was changed to “-8.17 percent per year” Page 6, paragraph 6 – “73 sites” was changed to “69 sites”; “three sites” was changed to “two sites”; “4.11 percent” was changed to “2.90 percent”; “70 sites” was changed to “67 sites”; “2.18 percent per year” was changed to “5.03 percent per year”; “67 sites” was changed to “64 sites”; “91.78 percent of all sites” was changed to “92.75 percent of all sites”; “2.19 percent per year” was changed to “5.05 percent per year”; “-2.6 percent per year” was changed to “-6.00 percent per year”; “70 sites” was changed to “66 sites”; “95.89 percent of all sites” was changed to “95.65 percent of all sites”; “five sites” was changed to “four sites”; “6.85 percent” was changed to “5.80 percent” Page 7 – Figures 6–3 and 6–4 were replaced. Vertical scale was changed for these figures. Page 8, paragraph 1 – “1.05 percent per year” was changed to “2.43 percent per year”; “-2.48 percent per year” was changed to “-5.71 percent per year”; “62 sites” was changed to “59 sites”; “84.93 percent” was changed to “85.51 percent”; “65 sites” was changed to “63 sites”; “89.04 percent” was changed to “91.30 percent”; “58 sites” was changed to “56 sites”; “79.45 percent” was changed to “81.16 percent” Page 8, paragraph 3 – “-1.46 percent per year” was changed to “-3.37 percent per year”; “1.65 percent per year” was changed to “3.81 percent per year”; “-2.68 percent per year” was changed to “-6.16 percent per year” Page 8, paragraph 4 – “1.19 percent per year” was changed to “2.73 percent per year”; “-4.5 percent per year” was changed to “-10.73 percent per year”; “6.02 percent per year” was changed to “13.86 percent per year”; “-3.53 percent per year” was changed to “-8.12 percent per year” Page 9 – Figures 6–5 and 6–6 were replaced. Vertical scale was changed for these figures. Page 10, – Figure 6–7 was replaced; vertical scale was changed for this figure. “version 0.1.0” was changed to “version 0.2.0” in the Pohlert (2016) reference.