1.2,- 



Vf/Vs 0.6 - 



-Slat Fencing 



LEGEND 



J Data Range 



• Average 



Vf Volume of sand trapped 



Vj Estimated volume slat fencing 

 would have trapped 



30 40 50 60 70 80 90 100 



Pet Porosity 



Figure IQ. Effect of porosity of fabric fence on volume of sand trapped. 



21 



