|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
CORRECTION OF OBSERVED DEPTH FOR ANGLE OF SOUNDING LINE
1. Purpose and objectives
A method of determining water depth and depth of gauging point from
the measured angle of the sounding line when stream gauging from a boat or cableway.
The method is based on an analysis of the vertical velocity
distribution and the characteristics of the sounding line and instrument.
Results are presented in tables.
The deviation angle measured while gauging and instrument and cable
The tables give correction for air line, water line, depth of gauging point and displacement of the cable.
5. Operational requirements and restrictions
The tables may be used for angles up to 40 degrees.
6. Form of presentation
Tables of the corrections to be applied.
7. Operational experience
The computed correction values have been checked by measurement at angles up to 60 degrees. The tables have been used successfully since 1959 for boat measurements and since 1977 for cableway measurements.
8. Originator and technical support
Hydrometric centre, Yangtze Valley Planning Office, Henkou, China.
10. Conditions on use
Cost of reproduction and mailing.
|(First entered: 17 DEC 80||
Last updated: 17 SEP 81)