Table 4. Growth characteristics of four lifts 

 of spur fencing, plot 2, 19 70-77. 



Parameter 



Time interval 

 (mo) 



Value 



Sand accumulation 



18^ 

 30, 

 90 



11.3 m3/m 





13.8 mVm 





17.5 m3/m 





21.3 mVm 

 32.5 mVm 



Increase in , 



30 



0.6 m 



crest elevation 



90 



1.8 m 



3 

 Dune slope 







Landward 



90 



1 on 11.4 



Seaward 



90 



1 on 12.9 



3 

 Base width 



90 



37.2 m 



■^Volumes calculated for area 23 meters land- 

 ward and seaward of plot centerline; average 

 of profile lines 3 and 4. 



^Volume calculated for area 30.5 meters land- 

 ward and seaward of plot centerline; average 

 of profile lines 3 and 4. 



^Average of profile lines 3 and 4. 



Figure 14. Plot 3 (American beachgrass on 60-centimeter spacing). 



May 1973; recent planting by local volunteer groups evident, 



22 



