- 8 - 



which wrote a record of the tides on a paper tape moving at 1/2 

 inch per minute (fig. 12, and completely represented in Appendix 

 IV of Copy No. 1 only). The wind direction was indicated by a 

 small banner on a circular card placed on an island (unnamed) 

 near the center of the model. In "no wind" conditions this indi- 

 cator was removed from the model. 



The tests of the model consumed approximately 65,000 model 

 "hours" (about seven and one- half model "years") and were recorded 

 in color on approximately 13,000 frames of 35 Mn film strip and 

 3,000 feet of 16 mm time-lapse motion-picture film. The bulk of 

 this record has been reduced to a series of 41 summary drawings 

 (Appendix III) representing the continuous and intermittent 

 (tidal) excursion of the simulated industrial waste in the model 

 for each wind condition in each of two major bleed water discharge 

 conditions. Tests B and C, and two concentration conditions, 

 nominally 1:1000 and 1:200» Test A, vhich shows the distribution 

 of fresh water drainage through the model area, is most easily 

 seen in the original 16 mm time-lapse motion picture. However, 

 figure 13 shows a characteristic stage after 30 "days" advance of 

 fresh water into Barataria Bay from the north. This circulation 

 of fresh water drainage undoubtedly tends to block the otherwise 

 free circulation of water from Lake Grande Ecaille into Barataria 

 Bay. 



