USGS Washington Water Science Center
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By Christopher A. Curran, Christopher S. Magirl, and Jeffrey J. Duda
Figure 1. Map of Elwha River in northwestern Washington showing water-quality monitoring station 12046260, Elwha River at Diversion, near Port Angeles, where turbidity and suspended-sediment concentrations were measured, and streamflow-gaging station 12045500, Elwha River at McDonald Bridge, near Port Angeles, where continuous water discharge was recorded.
(High resolution, PDF 280 KB)
Figure 2. Graphs showing least-squares regression model used to estimate (A) total suspended-sediment concentrations, and (B) fine suspended-sediment concentration from turbidity at U.S. Geological Survey water-quality monitoring station, Elwha River at Diversion, near Port Angeles (12046260).
(High resolution, PDF 330 KB)
Figure 3. Graph showing suspended-sediment concentration bins as a proportion of each week (based on a maximum of 672 15-minute turbidity samples per week) from September 2011 to September 2013 at U.S. Geological Survey water-quality monitoring station Elwha River at Diversion, near Port Angeles (12046260). At top, a corresponding hydrograph of weekly average discharge 8 km upstream at U.S. Geological Survey streamflow-gaging station Elwha River at McDonald Bridge, near Port Angeles (12045500).
(High resolution, PDF 265 KB)