71 



A MKTII(H> OF ItlHECT AEFtATlO.N OF S'lOIfFI) WATFKS. 



15 V 

 Wll.L StOi'T AM) A. li. FOI.KY. 



T1h> imrposo of this piipt-r is to doscrilK' a simple ;i])p;ir;itus for tlio eco- 

 nomic aeration of stored waters. The apparatus lias hi'eii installed at llie 

 impounding reservoir and pumping station of the Indiana University water 

 system. 



CKOW'S fOOr MR NOZZLC 



L£1^£L_ 



Figure 1. Shows the arangement of the air duct and nozzle in relation 

 to the dam and the water level. 



The impounding basin of this system is a dammed V-shaped valley, hav- 

 ing till' characteristic steep slopes of this valley type. These slopes are un- 

 derlaid with the shales of the knoltstone except at the upper levels where 

 the shale is replaced with limestcme. The knobstone is covered with a thin 

 layer of soil on which it is difficult if not impossible to grow grass, partly 



