The extreme flatness of the bottom in this area provides an opportunity 

 to test volume calculations relative to losses of spoil material over the 

 period of time between surveys. However, the flatness also causes small verti- 

 cal changes in depth measurement to result in large horizontal changes in con- 

 tour locations. Consequently, programs are being developed to calculate volume 

 of spoil based on integration of vertical profiles, or inversely by calculation 

 of water volume over a given area. This work is currently in progress and will 

 be evaluated for application to this and other disposal sites. 



Currents 



Two sets of current data have been obtained at the New Haven disposal 

 site The first set of data from 13 April, 1978 to 16 May, 1978 is presented 

 in Table H-l and Figure H-4(a-c). the second set from 29 July to 11 September 

 is shown in Table H-Z and Figure H-5(a-c). Both sets of data are similar, how- 

 ever, in all respects, the second record has slightly higher energy coatent. 

 This energy is contained mostly in the residual component. The residual com- 

 ponent of the second record has more than twice as much energy as the April 

 to May record, while the tidal comoonent is only W% greater. It should b* 

 noted however, that the entire residual component comprises only 10-15% of the 

 energy contained in each record. 



The 10% highest speeds for both of these records are less thaa the peak 

 tidal speeds, which is also a reflection of the larqe component of tidal motion. 

 It is significant that these speeds represent only the upper 4.7 and 6.5% respec- 

 tively. Consequently, the residual component is not sufficient to cause many 

 values higher than the tidal motion alone. 



