- 42 - 



discharge quite readily and maintain acceptable accuracy. Simi- 

 larly the rain water circulation system involved the discharge 

 of 165 cubic centimeters per minute, a voluiae equivalent to 

 farmer's estimate of the average fresh -water draina,ge 

 (450 X 10 ft.^/day) into Barataria Bay. This volume was pumped 

 from the Gulf portion and was piped around the outside of the 

 model to the Little Lake equivalent box where it discharged as a 

 snail steady stream. This flow was adjusted by means of a needle 

 valve at the pump. The same pump also circulated a continuous 

 stream in the Gulf of Mexico portion of the model through a 

 venturi tube which entrained the Gulf water and produced the 

 characteristic westward trend of the circulation of Gulf past the 

 mouths of the passes into the Barataria Bay estuary. The venturi 

 system was adjusted to produce a steady westward current of 0,25 

 "knot" along the coast line. 



