APPENDIX 



EXPERIMENTAL PROCEDURES FOR 7QX-Q6 AND 70X-1Q 



This appendix documents those aspects of the experimental procedures 

 which were unique to experiments 7QX-06 and 70X-1Q. The procedures common 

 to all experiments are documented in Volume I (Stafford and Chesnutt, 

 (1977). 



1. Data Collection . 



a. Regular Data . 



(1) Wave Height Variability . Except for the initial 10-minute 

 run of each experiment, two wave envelopes during each run were recorded 

 with wave gages moving along the center of each tank between stations 



+15 and +90 in experiment 70X-06 and +15 and +55 in experiment 70X-10 with 

 the instrument carriage moving at a near-constant speed of 10 feet per 

 minute. Wave records 002 through 006 from experiment 70X-06 contain only 

 the envelopes from station +15 to +90, because the runs were too short to 

 permit recording of two envelopes. 



(2) Beach Nourishment . These two experiments were unique in that 

 after 54 hours in the 6-foot tank and 62 hours in the 10-foot tank, the 

 jeach had eroded to the back of the tank. From then until the end of each 

 experiment, sand was periodically added to the backshore to maintain an 

 adequate supply. The following procedure was used throughout experiment 

 70X-06 and after 125 hours in experiment 70X-10, to determine the weight 

 and volume of sand added. (Between 62 and 125 hours in experiment 70X-10, 

 only the weight of the sand was determined.) 



(a) A 1 -pound coffee can, in good condition, with a known 

 weight, diameter, and height was used. 



(b) The can was filled, tapped in a "standard manner", and 

 the top leveled. 



(c) The weight of the full can was recorded to the nearest 

 ounce . 



(d) The sand was dumped into a larger bucket for temporary 

 stockpile until the backshore was rebuilt. 



From 54 to 92 hours in experiment 70X-06 and from 62 to 100 hours in 

 experiment 70X-10, the sand was added only between runs and the backshore 

 was rebuilt to provide a uniform fill 0.5 foot wide with a vertical face 

 across the width of the tanks with a top elevation of 0.67 foot. After 

 92 hours in experiment 70X-06 and 100 hours in experiment 70X-10, sand was 

 added to the backshore as needed during the runs, in addition to rebuild- 

 ing the 0. 5-foot-wide fill between runs. 



Determining the weight and volume of the filled cans of sand does not 

 provide actual weight or actual volume. Without measurements of the mois- 

 ture content [bulk densities probably ranged from 114 to 125 pounds per 



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