Just as for C^, Keulegan and Carpenter showed that C^ was 

 nearly constant over a large part of the wave period, therefore support- 

 ing the initial assun^ition of constant Cj^ and C^. 



Table 7-3 presents values of Cm reported by various investigators. 

 The importance of considering which wave theory was employed when deter- 

 mining C^ from field experiments is equally important when dealing with 



Based on the information in Table 7-3, the following choice of Cm 

 is recommended for use in conjunction with Figures 7-43 and 7-44: 



■^M 



= 2.0, 



R. 



Q. = 2.5 - 



when R < 2.5 X 10^ 



, when 2.5 X 10^ < R^ < 5 X 10^ 



■'^ ""' 5 X 10^ 

 C^ -= 1.5, when R^ > 5 X 10^. 



with Rg defined by Equation 7-39. 



Table 7-3. Experimentally Determined Values of Cw 



(7-46) 



* Range or mean ± standard deviation. 



7-109 



