Measurement of peak discharge at width contractions by indirect methods
This chapter describes procedures for measuring peak discharges using open-channel width contractions. Field and office procedures limited to this method are described. The discharge equation based on the continuity and energy equations between an approach cross section and the contracted section under a bridge or contraction is given. Contractions are classified into four geometric types. Discharge coefficients and computation procedures are given with a complete facsimile example of computation of a contracted-opening measurement. Additional procedures are given for multiple-opening contractions.
Citation Information
Publication Year | 1967 |
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Title | Measurement of peak discharge at width contractions by indirect methods |
DOI | 10.3133/twri03A4 |
Authors | Howard Frederick Matthai |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Techniques of Water-Resources Investigations |
Series Number | 03-A4 |
Index ID | twri03A4 |
Record Source | USGS Publications Warehouse |