243 



Between September 9, 1955 and February 16, 1956, five 

 drift card cruises were made. On all but one the cards 

 showed at least an initial drift outside the bay, and on three 

 cruises the surface waters from the outfall areas appeared to 

 have been completely flushed either to the north or to the 

 south. The one exception was the cruise of September 29, 

 on which the cards moved toward shore but at relatively low 

 velocities, generally requiring 48 hours or more to reach 

 the beach. However, a single card from an outfall station on 

 this cruise was reported 24 hours after its release at 1:30 p.m. 

 The next card recovered was 46 hours after release. Anomalous 

 cards of this kind appear not infrequently. It may be sus- 

 pected that an error was made in recording the date when the 

 card was filled out by the finder, but it should be remarked 

 that in tabulating and discussing drift card results, all 

 cards are taken at face value and none are omitted except those 

 which obviously are impossible (recorded as being recovered 

 two hours before they were released, etc.). The case under 

 discussion is the only one in which a card from an outfall 

 station has assumed such importance. If this card be elimi- 

 nated, the minimum time of drift to the nearest beach would 

 be about 34 instead of 19 hours. 



Beginning February 22, the situation changed and cards 

 from outfall stations on all eight cruises between that date 

 and August 9-10 came inshore with varying velocities. At 

 first the maximum velocities were low, of the order of 2 miles 

 per day, but they increased until on April 25 they were 6 miles 

 per day and again on June 19 from the effluent station they 



