Hydrology Of Urban Runoff
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VIEW THE REPLYPublication: Transactions of the American Society of Civil Engineers
Volume 125, Issue 1
Abstract
Presented in this paper is a detailed study of rainfall runoff relationships in urban areas based on a “Design Storm” of three hours duration. The “Chicago Hydrograph Method” of sewer design evaluates, in detail, the rainfall abstractions and flow detentions which intervene between the hyetograph of rainfall and the hydrographs of sewer supply and sewer outflow. Several types of uniform land use with various values of ground slope and depression pondage have been studied.
Based on the sewer hydrographs, thus derived, a series of easy-to-use design charts are presented, that can later be expanded to cover other combinations of the interdependent variables. The use of electronic computers has made such computations feasible.
For economical trunk sewer design in drainage areas, of a square mile or more, the authors present a further study of the hydrographs of sewer flow to delineate the surface profiles of instantaneous backwater-drawdown curves. An evaluation of the effect of nonuniform areal distribution of rainfall on the sewer flow hydrographs in large drainage areas is also presented. A sewer gauging station, coupled with a recording rain gauge, is being established in a fully developed, ten acre, residential area. The Chicago sewer pattern includes approximately ten thousand such “unit” areas, with various types of land use.
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Published In
Transactions of the American Society of Civil Engineers
Volume 125 • Issue 1 • January 1960
Pages: 1308 - 1355
Copyright
© 1960 American Society of Civil Engineers.
History
Published in print: Jan 1960
Published online: Feb 10, 2021
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