TM No. 377 



In the LIMDUM I results in table V-6, the mean vertical shear of the 

 horizontal current may actually be caused by wind stress accelerating the 

 surface water. This shear does not appear to be produced by instrument bias. 

 The positive shear is predominant in both positive and negative current direc- 

 tions with respect to the wind wave direction. However, more measurements are 

 needed to substantiate the existence of such shear phenomena. 



Table V-6. Energy Dissipation as a Function of Wave Height and 



Depth Below the Surface (from Stewart and Grant, 1962) 



160 



