General
Both the stage and the discharge of a stream vary most of the time and, in order to obtain a continuous record of discharge, the stage is recorded and the discharge computed from a correlation of stage and discharge. This correlation, or calibration, is known as the stage-discharge relation.
The operations necessary to develop the stage-discharge relation at a gauging station include making a sufficient number of discharge measurements and developing a rating curve by plotting the measured discharges against the corresponding stages and drawing a smooth curve of the relation between the two quantities. Discharge measurements are carried out over the range of stage variation in order to establish the rating curve as quickly as possible. Normally the lower and medium stages present little difficulty, but discharges at the higher stages may take some time and it may be necessary to resort to careful extrapolation until such time as the higher discharges are available to be...
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Bibliography
Herschy, R.W., 1995. Streamflow Measurement, Chapman & Hall, London and New York.
Herschy, R.W., 1993. The stage-discharge relation. Flow Meas. Instrum, 4(1), 11–15.
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Herschy, R.W. (1998). stage-discharge relation . In: Encyclopedia of Hydrology and Lakes. Encyclopedia of Earth Science. Springer, Dordrecht . https://doi.org/10.1007/1-4020-4497-6_212
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DOI: https://doi.org/10.1007/1-4020-4497-6_212
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