turbulent solution probably applies but further analysis of the problem must 

 be made . 



Experimental Procedure . - A water level recorder (Steven's Type M) was 

 operated in a gage well placed in the model basin and connected to the water 

 in the basin by pipes and openings of various lengths and diameters. Another 

 identical water level recorder was operated in a second gage well which was 

 completely open at the bottom. The two recorders were synchronized by de- 

 pressing the pens simultaneously. 



Experimental Results . - The problem has been analyzed earlier in this 

 paper on the basis of two types of flow^ viz: 



Laminar 5 head loss <>■ \r : long lines 



Turbulent 5 head loss o^ v | short lines 



Under usual conditions the flow probably s eldom is turbulent in the strict 

 technical sense but even in laminar flow through a short tube or orifice 

 the effective head is proportional to the square of the velocity and it is 

 in this sense that the term "turbulent" is used here . 



On the assumption that the instantaneous rate of flow is the same as 

 during steady flow under the same opsrating head (inertia neglected) analysis 

 of the problem yields the following results: 



(a) Laminar flow. 



Rm = ^^^^ sin ex e < 2300 



a V 



tan «£ = 1 , C - S U OC AL 



fl? 



H^ » = Hq sxnoc £ 



tan oc 9 =-G0t ex £ 



Q + e = H or 90° 

 2 



(b) Turbulent flow, 



M = o^ + K + fL 



^c 



N =. 1.113 a f g 



^ cXA ^M 



32 



