UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 852 
Contribution from the Bureau of Public Roads 
Thos. H. MacDonald, Chief 
Washington, D. C. 
PROFESSIONAL PAPER 
October 28, 1920 
THE FLOW OF WATER IN 
CONCRETE PIPE 
By 
FRED. C. SCOBEY, Senior Irrigation Engineer 
With Discussion by KENNETH ALLEN, ARTHUR S. BENT, F. C. FINKLE, 
ALLEN HAZEN, J. B. LIPPINCOTT, and H. D. NEWELL 
CONTENTS 
Introduction 
Nomenclature 
Types of Pipe 
PART 1. FLOW OF WATER IN PRES- 
SURE PIPES: 
Formulas for Flow of Water in Con- 
crete Pressure Pipes 
Opinions of Engineers Regarding the 
Carrying Capacity of Concrete Pipe 
Necessary Field Data for Determin- 
ing the Retardation Elements of 
Various Formulas 
Scope of the Experiments .... 
Equipment and Methods Employed 
for Collecting and Interpreting 
Field Data 
Elements of Experiments for the De- 
termination of the Friction Losses 
in Concrete Pipes 
Page | 
1 
2 
Pago 
PART 1. FLOW OF WATER IN PRES- 
SURE PIPES— Continued 
Descriptions of Pipes 25 
Analysis of Experimental Data . . 45 
Effect of Age Upon Carrying Capacity 49 
Capacity of Concrete Pipes .... 51 
Estimate Diagrams and Tables; So- 
lution of Typical Pipe Problems . 54 
Comparison cf Various Formulas . 62 
Capacity of Concrete Pipe Compared 
with that of Wood-Stave. Cast-Iron 66 
or Riveted-Steel Pipe 65 
PART 2. FLOW OF WATER IN GRADE 
LINE PIPES: 66 
Descriptions of Pipes 71 
Conclusions 74 
Acknowledgments 66 
Appendix 77 
Discussion 92 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1920 
