Table 10. Average cumulative volume changes for four beach usage types. 



Beach type 



Profile lines 



Avg. 



cum. vol. change^ 

 CmVm:i 



Annual avg. cum. vol. 

 change (m^/m/yr) 



Military 



1, 6, 7, 8 





+ 6.S 



+ 2.89 



Residential 



2, 9, 10 





+ 2.1 



+0.93 



Commercial 



3, 4, S 





+10.6 



+4.71 



Natural 



U to 18 





- 6.6 



-2.93 



^Over the 27-nionth survey period. 



Table 11. Average cumulative volume changes by reach. 



Beach type 



Profile lines 



Reach 



Avg. 



™Cm™mj 



change' 



Annual avg. cuju. vol. 

 change (mVm/yr) 



Residential 



1. 2 



Virginia Beach 





*23.7 





+10.5 



Commercial 



3. 4 



Virginia Beach 





+ 15.8 





+ 7.0 



Military 



S to 8 



Dam Neck 





0.0 





0.0 



Residential 



9. 10 



Sandbridge 





- 6.5 





- 2.9 



Natural 



11 to 15 



Back Bay 





-13.6 





- 6.6 



Natural 



16, 17, 18 



False Cape 





+ 9.6 





+ 4.3 



^Over the 27-nionth survey period. 



70 



