\- SHORELINE POSITIOK 

 VERTICHL DHTUn IS nSL 

 HORIZOMTHL OHTUII IS 

 BASE LINE 



OflTE 



9M0V77 



13EP7S 



12JUN73 



IflPRlO 



Figure 18. 



so 



DISTflMCE ( M) 



Surveys of profile line 7 at plot 4 

 (straight sand fence) . 



Table 6. Growth characteristics of four lifts 

 of straight fencing, plot 4, 1970-77. 



Parameter 



Time interval 



Value 





(mo) 





Sand accumulation 



18i 



12.5 mVm 





21.3 mVm 





21.3 mVm 





30, 

 65, 

 90 



42.5 mVm 

 48.8 m^/m 





45.0 m^/m 



Increase in ^ 



30 



2.0 m 



crest elevation 



90 



3.1 m 



3 

 Dime slope 







Landward 



90 



1 on 5.8 



Seaward 



90 



1 on 4.3 



Base width 



90 



30.2 m 



Volume calculated for area 23 meters landward and 

 seaward of plot centerline; average of profile lines 

 7 and 8. 



^Volume calculated for area 30.5 meters landward 

 and seaward of plot centerline; average of profile 

 lines 7 and 8. 



^Average of profile lines 7 and 8. 



26 



