FVP site as well as at CLIS-REF. 



While the hurricane caused physical disturbance of the 

 seafloor in central Long Island Sound, it did not result in 

 changes in the height of the disposal mound at FVP. The region- 

 wide erosion and redistribution of sediment was apparently 

 restricted to near-surface layers (i.e., < 10 cm); a significant 

 loss of volume was not apparent from the results of the 

 bathymetric surveys at the FVP disposal mound. Due to the 

 accumulation of errors associated with the fathometer, as well as 

 with wave conditions during the survey and the ability to re- 

 navigate the same survey lanes, the 5-10 cm layer which was 

 eroded is not consistently detectable by acoustic profiling. The 

 vertical profiles over the mound indicated an increase in depth 

 of approximately 10 cm only in the lane crossing the mound apex. 

 The volume difference calculation between the March and October 

 surveys indicated an insignificant loss of volume over the entire 

 site. An additional calculation between August and October also 

 detected no loss of volume. Based on both the REMOTS® and 

 bathymetric surveys, it must be concluded that the disturbance of 

 the seafloor due to the hurricane involved only small volumes of 

 material at the FVP mound. 



REFERENCES 



Needell, S. W. , Lewis, A., and M. Coleman. 1987. Map Showing the 

 Quaternary Geology of East Central Long Island Sound. USGS 

 Misc. Field Study Map, MF-1939 (B) . 



SAIC, 1982. Site Selection and Baseline Surveys of the Black 

 Rock Disposal Site for the Field Verification Program (FVP) . 

 DAMOS Contribution #23. 



SAIC, 1984. DAMOS Disposal Area Monitoring System, Summary of 

 Program Results 1981-1984. DAMOS Contribution #46 (SAIC 

 Report #SAIC-84/7521&C46) . 



