CONTENTS 



Page 

 CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) 7 



I INTRODUCTION 9 



II STUDY AREA 9 



III METHODS: EXPERIMENTAL PLOTS 13 



1. Experimental Plots 13 



2. Methods and Procedures 16 



IV RESULTS 19 



1. Cross-Sectional and Longitudinal Profiles 19 



2. Vegetative Transects 45 



V DISCUSSION 48 



1. Evaluation of Dune-Widening Methods 48 



2. Rate of Sand Accumulation and/or Loss 50 



3. Vegetative Difference Between Planted Dunes 



and Naturally Forming Dunes 55 



LITERATURE CITED 57 



APPENDIX 



A DETAILED DIAGRAM OF NORTH PADRE ISLAND STUDY PLOTS .... 59 



B COMPOSITION OF VEGETATION ALONG FIVE TRANSECTS IN 



FOREDUNE SECTION OF STUDY DUNES 64 



TABLES 



1 Experimental planting sites on north Padre Island 14 



2 Total sand volume for beach cross sections 20 



3 Sand volumes accumulated above planting elevation for 



the immediate locale of the planting 28 



4 Sand volume for beach cross sections from 100 feet in 



front of dunes to 190 feet across the dunes 35 



5 Sand volume for 290- foot foredune cross sections above 



planting elevation 36 



6 Rate of sand accumulation in 290-foot foredune cross 



sections above planting elevation 37 



7 Rate of lateral spread of planted grasses 46 



4 



