Line 8 



Line 7 



75 



I 



150 (m) 



Scale 



• Line 6 

 Line 5 



Line 4 

 Line 3 



\——\ Plot Cenferline 

 Profile Line 



Line 2 



Line I 



Figure 7. Cross-sectional profile locations. 



patterns of erosion and accretion on the spit as well as changes associated 

 with severe storms is given in Appendix B. The remainder of this section 

 focuses on changes that occurred within the boundaries of five test plots. 



1. American Beachgrass with 45-Centimeter Spacing (Plot 1) . 



a,. Installation, Damage, and Repair. Plot 1 was planted with American 

 beachgrass sprigs on 45-centimeter centers, three to five sprigs per hill in 

 1970. Survival of plantings during the first year was 85 percent. Bare areas 

 were replanted in October 1971. A severe storm in February 1972 deposited 0.3 

 to 0.7 meter of sand in the entire planting area. Plants were observed emerg- 

 ing through the deposit by April 1972. It was not possible to measure the 

 overall survival of the buried plants because bare areas were replanted in 

 April 1972 in keeping with study objectives to provide plant cover in the test 

 plots. Of importance, however, is that American beachgrass did emerge through 

 at least a 0.3-meter washover deposit and did survive saltwater inundation. 



b. Short-Term Dune Growth . At the end of the first complete growing sea- 

 son (October 1971) , the crest elevation of the planted area had increased only 



