|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
MEASUREMENT OF PEAK DISCHARGE AT WIDTH CONTRACTIONS BY INDIRECT METHODS
1. Purpose and objectives
To compute peak discharge through open channel width contractions.
The manual includes field and office procedures. The discharge
equation based on the continuity and energy equations between an approach
cross section and the contracted section under a bridge or other
contraction is given. Contractions are classified into four geometric
types. Discharge coefficients and computation procedures are given with a
complete example of computation of a contracted opening measurement.
Procedures are given for use with multiple opening contractions.
Channel geometry and high-water marks from a recent flood.
The peak discharge of the flood.
5. Operational requirements and restrictions
Best results will be obtained when applied by a person experienced in
open channel hydraulics to a suitable contracting reach with good high water marks.
6. Form of presentation
Manual in English.
7. Operational experience
8. Originator and technical support
U.S. Geological Survey.
10. Conditions on use
|(First entered: 25 AUG 87||
Last updated: 20 SEP 88)