Vlll 



CONTENTS 



Pages 

 Chapter VIII. Analysis of Flow Problems 84-93 



Water-surface profiles at changes of grade. At the entrance and 

 at the lower end of a channel. Channel connecting two reser- 

 voirs or lakes. 



Chapter IX. Step Methods for Backwater Curves . . 94-109 



Conditions requiring use of step methods. Direction of com- 

 putations. Different step methods and their fields of usefulness. 

 Backwater curves past islands. 



Chapter X. Bends, Transitions, and Obstructions... 110-132 



Low-velocity flow around bends. High-velocity flow around 

 bends. Changes in cross section. Transitions. Bridge piers 

 and pile trestles as channel obstructions. 



Chapter XI. Slowly Varied Flow 133-145 



Level-pool routing with invariable stage-discharge relation. 

 Level-pool routing with variable stage-discharge relation. Stor- 

 age under the backwater curx'e. 



Index 



147 



