64 



Kuichling plotted available data and derived the following formulas: 

 44000 



Q 



[M + 170 



+ 20, M, for floods exceeded occasionally; 



f 127000 

 and Q + ! h 



7.4 M, 



[m + 370 J 



In U, S. Geolog. .Survey Bulletin No. 147, 



for floods exceeded rarelv. 



' 46790 

 ,M + 320 



+ 



15 M, is 



is proposed. 



Many other formulas have been proposed and are given in a paper by Mr. 

 Fuller in the Trans. Amer. Soc. C. E., Vol. XXXIX, p. 1063. 



When applied to the Wabash they give widely varying results because 

 none of them was made for the topographical and meteorological conditions 

 which characterize our floods. 



Fig. 1. Drainaijo .Vrea of the Wabash River above Lafayette, Ind. 



The following extract from an article by the author in Engineering News, 

 April 24, 1913, will explain the conditions causing and accomjKmying this flood. 



A series of heavy rains, extending over the entire drainage area of the 

 Wabash River, connnenced March 21 and continued at intervals until March 

 26, raising the river to unprecedented heights, causing the loss of many lives 

 and the destruction of several iiiillioii (ioilars of jjrojx'rty. 



Previous floods whicii did iiiucli damage occurred .Tune 11, 1858, .\ugust 



