g b Weight of bed load collected 



H b Breaking wave height 



i Transport rate density (weight per unit width of surf 

 zone per unit time) 



k Von Karman constant, taken to be 0.4 



m Empirical constant 



n Empirical constant 



N Total number of streamers in trap 



N Number of data points 



Q s Volumetric bed -load transport 



q Water discharge 



q b Bed- load transport rate 



q Q Ambient sand transport rate (weight per unit width 

 per unit time) 



q ss Suspended sediment transport rate 



q t Trap-predicted transport rate (weight per unit width 

 per unit time) 



r 2 Squared correlation coefficient 



R Discharge parameter 



Re Reynolds number 



S Energy grade line 



S(k) Weight of sand collected in streamer k (g) 



S xx Variable defined in terms of N and x 



S Standard error of estimate 



t a/2 t-statistic 



u,,, Maximum horizontal orbital speed 



u(z) Flow speed at elevation z 



U* Shear flow speed (cm/sec) 



U* c Critical shear speed (cm/sec) 



V Characteristic velocity for use in Reynolds number calculation 



V bot Bottom flow speed (cm/sec) 



V mid Midflow speed (cm/sec) 



V Average flow speed without trap (cm/sec) 



V ojk Flow speed without trap (cm/sec) 



V t Average flow speed directly in front of trap nozzle (cm/sec) 



E2 



