PART III: RESULTS 



31. This chapter lists and explains the principal data on transport 

 rates, currents, and waves obtained in the September phase surf zone experi- 

 ments at SUPERDUCK. Selected results are also presented to introduce the 

 characteristics and potential uses of the data set. 



Orientation to the Measurement Runs 



32. Four types of sand transport rate data collection runs were per- 

 formed using the traps: 



a. Measurement of the temporal distribution of the longshore 

 sand transport rate at one or two points in the surf zone (TSM 

 run) . 



b. Measurement of the cross -shore distribution of the longshore 

 sand transport rate (SSM run) . 



c. Measurement of transport rates at neighboring locations 

 (typically 1 m apart) (consistency test) . 



d. Measurement of the transport rate in a rip current. 



Seven to nine streamers mounted on the racks provided the vertical distribu- 

 tion of the sand flux. 



33. Data collection runs documented in this report are listed in 

 Table 2. Each run is assigned a number, as shown in the first column, which 

 uniquely identifies it by the date and time the sampling was conducted. The 

 concatenation of numbers comprising a run identification (ID) gives the year 

 (86), month (9), day (11 to 23), and start time of the run in EDST as hours 

 and minutes on a 24 -hr clock. Current velocity and wave measurement (photo - 

 pole) ID numbers are similarly defined. Current meters and movie cameras were 

 often started a minute or two before the corresponding sand trap run began. 

 Trap and current meter deployment intervals and locations in the surf zone 

 relative to the photopole line are given in Table 3, and locations of the 

 photopoles in the FRF coordinate system are presented in Table A4. 



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