2.2 Side Scan Surveys 



In August, side scan surveys were conducted in the area 

 of CS-1 and CS-2 to assess the distribution of dredged material 

 deposited during the last year; an additional survey was performed 

 at the southeast quadrant of the CLIS site (CLIS-SE) to determine 

 baseline conditions should locations in this area be used for 

 future dredged material disposal points. 



The surveys were conducted using a Klein Side Scan Sonar 

 System along surveys lanes spaced at 100 m intervals to allow 

 complete coverage of the seafloor. A detailed description of the 

 Klein side scan system is presented in DAMOS Contribution #48. 

 (SAIC, 1985) . 



2.3 REMOTS® Sediment-Profile Photography 



REMOTS® images were taken with a Benthos Model 3731 

 Sediment-Profile Camera (Benthos, Inc. North Falmouth, MA) . The 

 REMOTS® camera is designed to obtain in-situ profile images of the 

 top 15-20 cm of sediment. A detailed description of REMOTS® camera 

 operation and image analysis is presented in DAMOS Contribution #60 

 (SAIC, 1986) . 



The purpose of the August 1985 REMOTS® surveys of the 

 CLIS disposal mounds was to monitor the potential change in the 

 sedimentary characteristics of the dredged material mounds, to 

 document the process of successional recovery of the disposal 

 mounds, and to monitor changes in the ambient fauna and sediments 

 adjacent to the mounds. To accomplish this, surveys were performed 

 at the STNH-N, STNH-S, CS-1, CS-2, MQR, NOR, NH-74, and NH-83 

 mounds; prior surveys at these mounds had been carried out in 

 September 1984. In addition, sediment-profile photographs were 

 obtained at the new CLIS-SE location. 



Approximately one month after the hurricane, REMOTS® 

 surveys were again performed at the same six CLIS disposal mounds 

 as the precision bathymetry: STNH-N, STNH-S, CS-1, CS-2, MQR, and 

 FVP. In the analysis of these post-storm surveys, special emphasis 

 was placed on the detection of erosional/depositional features. 

 Moreover, the temporal proximity of the pre- and post-storm surveys 

 allowed assessment of the storm's effects on benthic conditions at 

 each mound. 



Finally, ten REMOTS® stations extending from the New 

 Haven harbor entrance to the CLIS disposal site were surveyed to 

 evaluate the regional distribution of sediment erosion as a 

 function of depth and distance from shore. 



