the categories are again summarized (Figure 4-C-10). The conditions include the present sea 

 level with respect to the initial datum, the instantaneous rate of sea level rise, the subsidence rate 

 (which is constant for a simulation), and the marsh accretion and subtidal sedimentation rates 

 (which may vary as the percentage of wetlands varies). 



FIGURE 4-C-10 



INITIAL CONDITIONS AND ABUNDANCE OF EACH LAND CATEGORY AT 

 TUCKERTON, N J. 



1975 File: NJTUCKER 



Mean sea level = 0.00 m 



Rate of sea level rise = 0.00 mm/yr 



Subsidence rate for region = 1.20 mm/yr 



Accretion rate for wetlands = 0.00 mm/yr 



Sedimentation rate for subtidal areas = 0.00 mm/yr 



Decrease sediment with engineering projects on rivers = TRUE 



Protect developed areas = TRUE 



Waves from the east 



Undev. Upland 14.0% 



Dev. Upland 1.0% 



Undev. Lowland 0.6% 



Dev. Lowland 0.7% 



Prot. Lowland 0.0% 



High Dunes 0.0% 



Exp. Beach 0.1% 



Shelt. Beach 0.1% 



Dev. Exp. Beach 0.7% 



Dev. Shelt. B 0.6% 



Fresh Marsh 2.5% 



Salt Marsh 7.4% 



Mangrove 0.0% 



Tidal Flat 0.0% 



Shelt. Water 27.4% 



Open Sea 44.9% 



Regardless of the interval chosen for plotting the map output, summary output is provided 

 on the printer at a 25-year interval. The next screen display is of the updated map following the 

 chosen interval, in this case 50 years (Figure 4-C-ll). Note that all the freshwater marsh has been 

 converted to salt marsh but that no wetland has yet been lost. The cell just west of cell B has been 

 converted from upland to lowland, and several of the lowland cells have been converted to tidal 

 flat. 



Again, summary output is sent to the printer, and the next updated map is plotted, in this 

 case for the year 2100 (Figure 4-C-12). Regardless of plotting interval, the final map is plotted so 

 that the user can see the terminal conditions in graphic form. Unlike the intermediate maps, 

 which remain only as long as required to print and to compute new conditions, the final map 

 remains on the screen until a key is pressed. 



146 



