PART III: EXAMPLE 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 DUCK85. Selected results are also presented to introduce the 

 properties and potential uses of the data set. 



Orientation to the Measurement Runs 



32. Three types of sand transport rate data collection runs were 

 performed using the traps: 



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

 sand transport rate. 



b. Measurement of transport rates at neighboring locations, called 

 "consistency tests." 



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



If several streamers were mounted on the racks, as was usually the case, each 

 type of measurement also provided the vertical distribution of the sand flux. 



33. Sand transport rate 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 ID gives the year (85), month (9), 

 day (4,5,6, or 9), and start time of the run in Eastern Daylight Savings Time 

 (EDST) as hours and minutes on a 24-hr clock. Current velocity and wave 

 measurement (photopole) ID numbers are similarly defined. The current meters 

 and movie cameras were often started a minute or two earlier than the cor- 

 responding sand trap run. 



Cross-shore distributions 



34. Emphasis was placed on measurement of the distribution of the long- 

 shore transport rate across the surf zone. In measuring cross -shore distribu- 

 tions, the vertical distribution of the sand flux was also obtained at each 

 trap. Ten runs were performed to measure the cross -shore distribution. 

 Complete wave and current data are presently available for the eight runs 

 performed over 5-6 September. 



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