46 
6 Conclusions 
Evidence presented in the evaluation of beach-fill end losses indicates that 
the hot spot at Monmouth Beach is due to accelerated losses associated with the 
seaward protrusion of the beach fill in the region between sta 255 and 295. The 
remaining hypotheses either are unsupported or support the theory of beach-fill 
end losses as being the primary factor in the development of the hot spot. A 
brief summary of the results of each hypothesis is presented below relating each 
to the conclusions of this study. 
The effect of wave focusing by Shrewsbury Rocks on the hot-spot area was 
evaluated by analyzing the local wave climate. Shrewsbury Rocks are located 
approximately 4,500 ft (0.85 mile) to the northeast of the northernmost boundary 
of the hot-spot region. A directional wave gauge stationed offshore of Long 
Branch, New Jersey, provided wave data for the time period from start of beach- 
fill placement (June 1994) through March 1996 (well after recognition of the hot 
spot). Wave statistics indicate that an insignificant number of wave events 
approach from north of east and those that do approach shore from that direction 
have low wave heights and short periods because of the sheltering by Long 
Island, NY. Previous work by Kraus et al. (1988) indicates that wave focusing 
may occur at approximately sta 218 (0.7 mile north of hot spot) and slightly 
northward for the wave climate evident in this study. The conclusions of this 
portion of the study are that Shrewsbury Rocks does not likely affect the hot spot 
by the focusing of wave energy, but offshore bathymetric contours angling from 
the hot spot towards the rocks may increase breaking wave angles and accelerate 
northerly longshore sediment transport. 
Evaluation of cross-shore adjustment of the construction template within the 
hot-spot region indicates that little if any cross-shore movement of material has 
occurred. In fact, longshore processes dominate the evolution of the profiles 
within the hot-spot region. Each profile within the hot-spot region indicates net 
losses of material from the profile, indicative of longshore gradients in sediment 
transport. Further analysis of the profiles north of the hot-spot region indicates 
significant gains in material even during breaks in beach-fill placement. The 
significant net gains in beach profile volume to the north indicate that material 
lost from the hot-spot area was deposited in the adjacent, sediment-starved 
profiles to the north. In addition to the analysis of beach profile evolution, 
equilibrium beach profiles were superimposed upon the October 1995 beach 
profiles to assess the equilibrium condition of the beach profiles in the hot-spot 
Chapter 6 Conclusions 
