CONTENTS 



Page 



CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) 8 



I INTRODUCTION 9 



II STUDY AREA H 



III METHODS AND PROCEDURES 13 



1. Elevation Surveys of Experimental Dunes 13 



a. Foredune Profiles 13 



b. Beach Profiles 17 



c. Longitudinal Profiles 17 



2. Elevation Surveys of Naturally Formed Dunes 17 



3. Vegetation 18 



IV RESULTS 18 



1. Sand Volume 18 



a. Mean Sea Level Inland 200 Meters 18 



b. Sand Volumes Above Planting Elevation for 



30-meter Segment of the Foredunes 28 



c. 88-meter Segment of the Foredune 28 



2. Dune Base Width 28 



3. Dune Crest Elevation 33 



4. Shoreline Changes 33 



5. Naturally Formed Dunes versus Experimental Dunes 33 



6. Coastal Vegetation 38 



a. Vegetation on Experimental Foredunes 38 



b. Vegetation Behind (Landward) Experimental 



Foredunes 40 



c. Vegetation in Front (Seaward) of the 



Experimental Foredunes 40 



d. Midisland Dune Field 44 



V CONCLUSIONS 48 



LITERATURE CITED 50 



APPENDIX 



A DETAILED DIAGRAM OF NORTH PADRE ISLAND STUDY PLOTS 51 



B VEGETATION FREQUENCY AND COVER ALONG FIVE TRANSECTS IN 



THE STUDY DUNES AND NEAR REMNANT LIVE OAK MOTTE NORTHWEST 



OF PADRE ISLAND RANGER STATION 56 



