CONTENTS 



Page 



CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) 5 



SYMBOLS AND DEFINITIONS 6 



I INTRODUCTION 7 



II THE CALCULATION PROCEDURE 7 



1. Threshold Velocity for Sand Motion Initiation 7 



2. Conversion to Critical Linear Wave Conditions 9 



3. Consideration of Other Physical Factors 10 



III EXAMPLE CALCULATIONS OF CRITICAL CONDITIONS 12 



IV SUMMARY 15 



LITERATURE CITED 16 



TABLE 



Values for material characteristics used in calculations 8 



FIGURE 



Graph of the functions, sinh x and x(tanh x) 10 



