Data files from the Grays Harbor Sediment Transport Experiment Spring 2001

Waves, Hydrodynamics and Sediment Transport Modeling at Grays Harbor, WA

“…4. Some of the SSC values reported by Landerman et al (2004) were greater than 10 g/L, and some were even higher than 20 g/L (see Figures 9-24, 9-27 and 9-28). Based on the measured current speeds at stations 1-7 it is unlikely that the actual SSC values were this high as the flow would be non-Newtonian at this concentration.…”

“…With the meso-tidal conditions in Grays Harbor, the water column is not completely vertically well-mixed for most of the tidal cycle, though measurements by Landerman et al (2004) showed that the maximum difference between surface and bottom salinities at several nearshore stations was approximately 3 psu. No measurements of vertical salinity profiles inside the harbor were found.…”

“…3. Some of the measured SSC values (determined from regression equations given by Landerman et al 2004) showed that the higher OBS meterlocated 0.9 m above the bottom -measured a significantly higher SSC than the lower meter -located 0.3 m above the bottom (see Figures 9-24 through 9-28). These unexpected results were handled by ignoring the record from the higher OBS meter when those SSC values were higher than the SSC values from the lower meter.…”

“…The model calibration time period (14 October to 12 November 1999) was simulated using LTFATE for the purpose of comparing the suspended sediment concentrations measured by the two optical back scatter (OBS) meters at stations 1 -7 (see Figure 3-1) during the 1999 data collection program performed by Landerman et al (2004) to the LTFATE simulated suspended sediment concentrations. Figures 9-22 through 9-28 show comparisons between the measured SSC and LTFATE simulated SSC at stations 1 -7, respectively.…”

Historical evolution of the Columbia River littoral cell

“…For example, during spring and summer months with wave heights less than 2 m, bottom orbital velocities up to 100 cm/s (median of 45 cm/s) dominate over near-bottom currents of up to 48 cm/s (median of 13 cm/s) in 9-m water depth (Lacy et al, 2005;Sherwood et al, 2006). Wave orbital velocities increase shoreward, nearly doubling between 24 and 13-m water depth (Landerman et al, 2004). Asymmetric oscillatory motion augmented by upwelling circulation promotes onshore sand transport during these summer conditions (Osborne et al, 2002;Sherwood et al, 2006).…”