V t j k Flow speed directly in front of trap nozzle (cm/sec) 



V* Threshold midflow or bottom flow speed for sand movement 

 (cm/sec) 



WW Wet weight of sand 



w s Weight of sediment collected 



x Independent variable 



x Average x 



y Dependent variable 



z Elevation from bed (cm) 



z Representative bed roughness (cm) 



Z Distance from seabed to mid-streamer (cm) 



Aa(k) Distance between nozzles k and k+1 (cm) 



Aal Distance between streamers 1 and 2 (cm) 



Aa2 Distance between streamers 2 and 3 (cm) 



Ah Height of nozzle (cm) 



At Sampling interval (min, sec) 



Aw Width of nozzle (cm) 



Ayj Representative horizontal distance (cm) 



Az k Representative vertical distance (cm) 



e Maximum error corresponding to E s 



* Shields number 



v Kinematic viscosity of water (cm 2 /sec) 



p Density of water (kg/m 3 ) 



p s Density of sand (kg/m 3 ) 



r c Critical shear stress at the bed 



r„ Shear stress at the bed 



E3 



