APPENDIX D: SAND -TRAPPING EFFICIENCY TEST DATA 



1. Data presented in Tables Dl through D6 were collected during the 

 sand-trapping efficiency tests. The data are organized by nozzle or type of 

 basin test (2.5-min or 7.5-min), and each test is uniquely designated by its 

 run number and date. Tables presenting data collected during the nozzle tests 

 (Tables Dl through D4) are organized with the testing midflow V mid and near- 

 bed V bot flow speed, the weight of material collected in the near -bed 

 streamer SI, in the next higher elevation streamer S2, and so on. The 

 distances between streamers 1 and 2 (Aal) and between streamers 2 and 3 (Aa2) 

 are given in the last two columns of the tables. The notation 'tr' indicates 

 that only a trace of sand was collected for that particular entry. 



2. Tables presenting the basin data (Tables D5 and D6) are organized 

 with the width of the basin w, the midflow and bottom flow speeds, and 

 quantities collected in Basin 1 (upflow) Bl , Basin 2 (middle) B2 , and Basin 

 3 (downflow) B3 . The total weight collected in all basins is presented in 

 the last column. 



Dl 



