Greenwich Point 



Pork 



Cummings Pork 



Beach 



Cove Island Beach- 

 Calf Pasture Beach- 



■ Hammonasset Beach 

 -Guilford Point Beach 

 ■Prospect Beach 

 •Woodmont Beach 

 "Gulf Beach 

 'Silver Beach to Cedar Beoch 

 'Short Beach 

 Sasco Hill Beach 

 'Burial Hill Beach 



Compo Beach 



Sherwood Island 

 State Park 



Figure 15. Projects along the Connecticut shore involving 

 beach fill. All projects but Sherwood Park and 

 Silver Beach to Cedar Beach are completed but 

 may require future beach nourishment. 



2. Suitability of Sand for Beach Nourishment. 



Sand should meet certain important criteria for use as borrow material in 

 beach restoration and protection projects. Factors to consider are the (a) 

 population mean grain size and total size distribution, (b) mineralogic com- 

 position, (c) economics of sand recovery, and (d) placement and distribution 

 on the beach. The borrow material should be of at least the same size and, 

 preferably, slightly coarser than native material on the beach to be nour- 

 ished. If borrow material was significantly smaller in particle size than 

 indigenous sand it would be expected to be less stable and out of equilibrium 

 with the wave and current regime. Consequently, it would be rapidly eroded 

 and either carried offshore by wave-induced currents or transported parallel 

 to the beach by longshore currents. In either case the net effect is acceler- 

 ated retreat of the fill to readjust nearshore profiles, thus_ requiring con- 

 siderably larger total volumes of initial fill and more frequent periodic 

 replenishment. If the borrow sand does not have the same grain-size charac- 

 teristics as the native beach sand, the grain-size population of the borrow 

 sand should preferably be more poorly sorted; i.e., a greater variation in 

 size classes than the native beach sand, and initial overfill relative to the 

 required volume of fill for sand with the same characteristics as that of the 

 native beach would be necessary for comparable performance. 



Borrow material should be composed of hard, chemically and physically 

 resistant minerals, such as quartz, which will not readily degrade in the 

 high-energy near shore-beach-dune environment. 



37 



