Stafford, 1978) two experiments with Ho/Lo = 0.004. Volume I of the 
series (Stafford and Chesnutt, 1977) discusses the contents and primary 
purposes of these reports. 
2. Experimental Procedures. 
The experimental procedures used in the LEBS experiments are described 
in Volume I which provides the necessary details on the equipment, quality 
control, data collection, and data reduction for all 10 experiments. Data 
collection and reduction procedures unique to experiments 72B-06 and 
72B-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 Generated 
length wave height? 
(ft) (ft) 
1 Refer to Volume I (Stafford and Chesnutt, 1977) for relation 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., of sand (by dry sieve analysis) = 0.22 
millimeter. 
Two experimental facilities were used (see Figs. 3, 4, and 5 in 
Vol. I). 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 generators is described in Section IV and 
Appendix B of Volume I. The concrete slope provided a control (bench- 
mark value) for the varying reflection measured in the neighboring tank 
with the movable bed. 
Two basic differences existed between the two facilities: (a) The 
tank width, where one pair of tanks (each 6 feet wide) was used for ex- 
periment 72B-06, and the other pair of tanks (each 10 feet wide) was used 
for experiment 72B-10; and (b) the gap at the ends of the generator blades 
of the 10-foot tank generator but not the 6-foot tank generator. (The gap, 
which was measured in March 1975, is discussed in Vol. I.) The initial 
test length (distance from the wave generator to the initial stillwater 
level (SWL) intercept) was 93 feet (28.3 meters) in experiment 72B-06 
and 54.7 feet (16.7 meters) in experimént 72B-10. This length was 7 feet 
(2.1 meters) greater on the concrete side in both tanks. 
10 
