Table 13. Values of r for tribars and quarrystone on a 

 1 on 3 slope (after Vanoni and Raichlen, 1966). 



d s 



(tribar) 



(quarrystone) 1 



gT 2 



r 



dg = 0.257 m (0.844 ft) 



3.0 



2.11 



2.53 



0.00155 



0.0020 



0.00285 



0.48 

 0.47 

 0.43 



5.0 



1.27 





0.00092 



0.0012 



0.0017 



0.48 

 0.46 

 0.40 



8.0 



0.79 





0.00056 

 0.00076 

 0.00104 



0.42 

 0.41 

 0.27 



dg = 0.29 m (0.95 ft) 



3.0 



2.38 



2.84 



0.0015 



0.46 



5.0 



1.43 





0.0012 



0.47 



8.0 



0.89 





0.00077 



0.38 



Overall avg 0.43 



Quarrystone was at a higher elevation than the tribars; 

 runup did not reach the quarrystone section for d s /H^ > 5.0. 



90 



