method values were higher than the automated method values by an average 
of 0.08. 
All data from the movable-bed tank for experiment 72A-06 versus time 
are plotted in Figure 5, with the manual method values reduced 0.08 to 
give a single curve. The Kp dropped from an initial value of 0.24 to 
0.18, then to 0.17 at 3 hours and began to increase, reaching 0.30 at 
25 hours. From 25 to 80 hours, Kp remained high (between 0.25 and 
0.30), but still fluctuated. After 80 hours, Kp started to decrease, 
while continuing to fluctuate somewhat, and was 0.22 at 135 hours (end 
of the experiment). 
All Kp data from the movable-bed tank of experiment 72A-10 versus 
time are plotted in Figure 6, with the manual values reduced 0.08 to give 
a Single curve for each range. The Kp along the centerline was gener- 
ally higher than along the outside range. The three KR values at each 
time have been averaged to give an average Kp for the tank plotted 
against the Kp axis on the right in Figure 5. The Kp measured along 
the outside ranges was much lower than the Kp measured along the 
centerline of the 10-foot tank. The Kp dropped initially and then 
began a gradual long-term increase until 55 hours, with considerable 
short-term variation. From 55 to 80 hours the Kp varied with no long- 
term increase or decrease. The maximum individual Kp was 0.46 along 
range 5 and the maximum of the average Kp was 0.37, both at 55 hours. 
c. Standing Waves. The measurements of wave height over the profile 
at 55 and 105 hours in experiment 72A-06 are shown in Figures 7 and 8. 
The foreshore was essentially an antinode, with the peak runup at 
elevation 0.6 to 0.7 foot (18.3 to 21.3.centimeters). Another antinode 
(located near station 18 in Fig. 1) varied in position between stations 
16 and 20 during the experiment. Standing waves also occurred in 
experiment 72A-10. Circulation patterns developed between antinodes in 
experiment 72A-06 (discussed in Sec. II,6). 
d. Secondary Waves. Secondary waves can be seen in the envelope 
recording in Figure 1 and the stationary recordings over the profile in 
Figures 7 and 8. Secondary waves generated by the sinusoidal motion of 
the wave generator contribute to the spatial wave height variability in 
the figures, but the variation appears to be an order of magnitude less 
than the variation due to reflection. The secondary waves in Figures 
7 and 8 could have been generated by both the sinusoidal motion of the 
generator and the shoaling of the wave over the profile. The variation 
in wave heights at a given location makes quantification of the second- 
ary \wave heights in this area difficult. 
2. Profile Surveys. 
a. Interpretation of Contour Movement Plots. The profile surveys 
(discussed in Vol. I) measured the three space variables of onshore- 
offshore distance (station), longshore distance (range), and elevation 
at fixed times (Table 2) during the experiments. The CONPLT method for 
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