2 . Methods and Procedures . 



a. Elevational Surveys . Cross-sectional profile surveys for 

 five experimental dune areas (Fig. 4) were conducted in March 

 1975, August 1975, March 1976, and August 1976. Foredune profiles 

 were as follows: 



(a) Unplanted natural dune area— eight profiles, 100 feet 

 (30 meters) apart, from 100 feet in front of the 

 natural dune area to 200 feet (61 meters) across 



the foredune area. Elevations were taken at 10- 

 foot (3 meters) intervals (rod readings to the nearest 

 0.01 foot). 



(b) 1,200-foot sea oats dune— 12 profiles, 100 feet 

 apart, from 100 feet seaward of the grass extension 

 of the dune to 190 feet (58 meters) across the dune. 



(c) Dune-width extension dune— three profiles. 



(d) 1,100-foot bitter panicum dune— 12 profiles, 90 

 feet (27 meters) apart. 



(e) 1,200- foot bitter panicum dune— 12 profiles, 100 

 feet apart. 



Cross-sectional beach profiles were as follows: 



(a) Unplanted natural dune stations 3+00 and 6+00. 



(b) BM "Al". 



(c) 1,200-foot sea oats dune, stations 3+50 and 7+50. 



(d) Dune-width extension dune, station 2+09. 



(e) 1,100-foot bitter panicum dune, stations 3+15 and 6+75. 



(f) BM "Kenny". 



(g) 1,200- foot bitter panicum dune, stations 3+50 and 6+50. 



Elevations were read at 20-foot (6 meters) intervals and keyed to 

 the east base line. 



Two longitudinal surveys along the top of the dunes and 

 parallel to the beach were made as follows for the 1,200-foot sea 

 oats, 1,100- foot bitter panicum, and 1,200- foot bitter panicum dunes. 



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