CALCULATION PROCEDURE FOR SAND TRANSPORT 

 BY WIND ON NATURAL BEACHES 



by 



Abdel-Latif Kadib 

 University of California 



INTRODUCTION 



The estimation of the annual amount of sand transported along the 

 coast is important for planning and constructing coastal structures. 

 One of the motive forces for transporting sand along the coast is the 

 well-known littoral current generated by wave action, and the other is 

 the wind. Sand movement by wind action has been treated by several 

 research workers. In this report, a summary of some of the available 

 methods of calculating rate of sand transport by wind, and calculations 

 for annual sand transport inland by wind from natural beaches are pre- 

 sented. 



SAND TRANSPORT BY WIND 



Several investigators have developed expressions for the rate of 

 sand movement as a function of certain variables. Some of these ex- 

 pressions are as follows: 



CI")* 

 Bagnold Formula : The rate of sand movement per unit width 



and unit time , q, is given by : 



^-'^ JJ J "*' ''^ 



where D is the grain diameter of standard 0.25 mm sand, d is the grain 

 diameter of sand in question, Y is the specific weight of air, U^ is the 

 shear velocity, and c has the following values: 



* References on page 11. 



