Dcs'ic jn Problem Longshore Transport 



Page no : 



Calculated by: 

 Checked by: 



Dote : 



111 of /33 



./. R.. K. 



21 Mar. 13 



Longshore Sand Transport (cont) 



Shoreline az/mufh ^zo'' wii-h k = 0.55 



Sim'ilarlLjj 



Note: The computed values ore suspect since 

 they are much larger fhan voines 

 measured at various east C'?osf 

 locations. The discrepancy cc uld be 

 due to several factors: 



1 Energu inos computed, i smQ the 

 sign I fj cant y\jave which s a 

 relatively high wave in f le spectrum. 

 Actual vsave energy is ayprotimate- 

 lij I/Z. of the significohi wave's 

 energy. A/ote, however^ the constant 

 k is based partly on data arrived 

 at by using significant wave energy. 



2. The hind cast wove data were for 

 deep water. Energy dissipation due 

 to botiom friction and percolation 

 v/ere not considered; conseq.uenily, 

 the wave energy reaching shore 

 will be lower than that computed- 



2>. Refraction was assumed to be by 

 straight, parallel bottom contours. 

 This assumption nioy not be valid. 



4. leaves approaching shore with their 

 crests nearly perpendicular to the 



8-117 



