quality control, data collection, and data reduction for all 10 
experiments. 
Data collection and reduction procedures unique to experiments 
72A-06 and 72A-10 in this study are documented in the Appendix. The 
conditions of these two experiments are summarized in Table 1. The 
table shows that the initial slope, water depth, wave period, wave 
height, and sand size were the same in both experiments. 
Table 1. Summary of experimental conditions. 
Experiment! Initial test Initial Generated 
length slope wave height? 
(ft) (ft) 
lRefer to Volume I (Stafford and Chesnutt, 1977) for rela- 
tion between these experiments and the other eight LEBS 
experiments. 
“Determined for the given wave period and constant water 
depth of 2.33 feet so that the generated wave energy flux, 
computed from linear theory, had a constant value of 5.8 
foot-pounds per second-foot. 
NOTE.--Constant: Initial d., (by dry sieve analysis) was 
0.22 millimeter. 
Two experimental facilities were used (see Figs. 3 and 4 in Vol. I 
and Fig. A-1 in the App. to this volume). Each facility consisted of 
two side-by-side wave tanks, one with a 0.10 concrete slope and the 
other a sand slope. A generator was common to each pair of tanks so 
that each had identical wave energy input. The operation of the gener- 
ators is described in Section IV and Appendix B of Volume I. The con- 
crete slope provided a control (bench-mark value) for the varying 
reflection measured in the neighboring tank with the movable bed. 
The basic difference between the two facilities was the tank width. 
One pair of tanks, each 6 feet (1.8 meters) wide, was used for experiment 
72A-06; the other pair, each 10 feet (3.0 meters) wide, was used for 
experiment 72A-10. The initial test length (the horizontal distance 
from\the initial stillwater level (SWL) intercept on the beach to the 
mean position of the wave generator) on the sand side was 93 feet (28.3 
meters) in experiment 72A-06 and 54.7 feet (16.7 meters) in experiment 
72A-10 (Table 1). .This length was 7 feet (2.1 meters) greater on the 
concrete side in both tanks. 
The initial grading of the sand slope in experiment 72A-06 was on 
17 April 1972. The first run was on 24 April 1972, the last run was on 
10 
