0.2 



0.4 



0.6 0.8 1.0 



Hi/k r 



4.0 6.0 8.0 



Figure 38. Values of r for relative roughness (H^/k^) , for 



1 on 2 riprap slope fronted by 1 on 200 slope (curve 

 derived from Raichlen and Hannack, 1974). 



82 



