From Figure 5-3, quadrant 2, 



(Source A) R (overfill ratio) = 1.10 



V - V ^ 2.19-1.94 ^ ^^^3^ 



a, 0.57 



<J)n 



%B 1.29 ^ 2.26 



a, 0.57 

 (t)n 



From Figure 5-3, quadrant 1, 



(Source B) R (overfill ratio) = 1.55 



Conclusion: use material from Source A. 



3. Required Volume of Fill . 



Rule of thumb: 2.5 cubic meters of native material per meter (1 cubic 

 yard per foot) of beach width or 8.23 cubic meters per square meter of beach. 



„ ■. ,7 . , -,^ r^^ /8.23 m \ , , „„ , , 1000 m 

 Volume of native sand = 20.00 m 7: — (1.00 km) x 



2 y ^ — -- —' km 

 m 



5 3 

 Volume of native sand = 1.65 x 10 m 



5 5 3 



Volume from Source A = 1.10 (1.65 x 10 ) = 1.81 x 10 m 



8-92 



