3-70 



which show the plume in New Haven Harbor generally rising to the surface 

 further from the discharge point than was predicted from physical model 

 results and the temperature rise in the boil area being approximately 

 the same as is seen in the physical model results. 



The consistent delayed rise of the plimie to the surface in New 

 Haven Harbor is probably due to the fact that the mixing of salinities 

 there does not create as great a density difference as was present in 

 the physical model, which only took into account temperature differ- 

 ences. However, because the temperature rise in the boil area was 

 predicted quite well by the physical model and because the plume seems 

 to mix with the ambient water to approximately the same extent as was 

 predicted by the model, we expect the plxraie to have momentum similar to 

 model prediction when it reaches the surface of the harbor. Thus, 

 the flow-away velocities found in the University of Florida model basin 

 may reasonably be expected to be similar to those which are actually 

 present. 



The flow- away velocities of the discharge were limited to, and 

 only measured at, the surface in the model. The potential of the dis- 

 charge to affect the momentum balance in the inner harbor can be 

 assessed by comparing the average momentum of the tide through the 

 discharge location (Transect 1; Figure 3-20) with the momentum of the 

 discharge. 



The mean tidal height is 1.9 m. Assuming the stand of the 

 tide is nearly synchronous throughout the harbor in region A (Figure 3- 

 20) and that the tide can be represented as a one component sinusoid: 



dh ^ ^(-^^"^ " = 1.34 X 10-^ ^ 



max (12.4 hr) (3600 -^) 



where ( -.. ) 



at 



max 



