to support this supposition. However, these materials could also 

 represent sediment normally in suspension that was deposited during 

 the period of unusually low tidal currents following passage of the 

 storm. Recalling the near-equilibrium hypothesis discussed above, 

 these materials should be particularly susceptible to resuspension 

 following restoration of "normal" tidal current levels. Although 

 additional work is required to resolve the particular cause of this 

 secondary peak, one fact is certain. Its presence was real and not 

 simply associated with direct storm-induced resuspension. 



5.0 SUMMARY AND CONCLUSIONS 



In the Central Long Island Sound disposal site, the 

 results of the post-storm REMOTS® survey indicate that hurricane- 

 induced redistribution of the top few centimeters of surface 

 sediments was widespread. Evidence of disturbance of the 

 sediment-water interface, such as mud clasts, shell lag deposits, 

 exposed worm tubes and truncated RPD layers was apparent in many 

 of the REMOTS® images (Figures 5-1 and 5-2). However, it must be 

 emphasized that this sediment redistribution was limited in extent 

 to a rather small interval at the sediment -water interface (Table 

 4-3) . The evidence of bottom disturbance generally was limited 

 spatially to the central portions of the disposal mounds. Volume 

 calculations revealed that only one mound (CS-1) experienced a loss 

 of material detectable through precision bathymetry (Table 3-1) . 

 This disposal mound was the most recently used CLIS disposal point. 

 The post-storm CLIS transect, extending from the New Haven harbor 

 entrance to the CLIS disposal area, revealed extensive spatial 

 evidence of bottom disturbance in water depths shallower than the 

 CLIS site. There was no indication of any storm-induced 

 disturbance at depths greater than 21 meters. 



It is interesting to compare the effects of Hurricane 

 Gloria to an earlier storm which occurred during the DAMOS program. 

 Hurricane David. These two storms displayed significantly 

 different characteristics, with David passing inshore favoring the 

 generation of westerly winds and Gloria crossing the Sound from 

 offshore resulting in southerly winds. In addition, Gloria was 

 generally a more energetic storm. Despite these differences, 

 however, both systems had some effect on the Central Long Island 

 Sound disposal site. Effects from both storms appear to have been 

 confined primarily to the shallower depths (i.e., the apex) of the 

 respective sediment mounds. Although a simple explanation for the 

 cause of these effects is complicated by the differences in 

 sediment type and the dredged material residence time in-place when 

 the two different storms occurred, the resulting response appears 

 to have been largely the result of variations in the magnitude of 

 the sediment boundary shear stress. The important finding from 

 this recent study is that while Hurricane Gloria created 

 perturbations to the normal tidal regime that were short-lived, it 

 did not produce conditions that would cause major movement of 



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