General
The velocity–area method for the determination of discharge in open channels consists of measurements of stream velocity, depth of flow and distance across the channel between observation verticals. The velocity is measured at one or more points in each vertical by current meter and an average velocity determined in each vertical. The discharge is derived from the sum of the product of mean velocity, depth and width between verticals. The discharge so obtained is normally used to establish a relation between water level (stage) and streamflow. Once established, this stage-discharge relation is used to derive discharge values from records of stage at the gauging station.
Not all current-meter measurements, however, are made to establish a stage-discharge relation, and individual determinations or’ spot measurements’ are very often required for management functions. Such measurements may not require the measurement of stage, but otherwise the method of measurement is the same. At...
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Bibliography
Herschy, R.W., 1993. The velocity–area method, Flow Meas. Instrum., 4(1), 7–10.
Herschy, R.W., 1995. Streamflow Measurement. Chapman & Hall, London and New York.
Cross references
Editor information
Rights and permissions
Copyright information
© 1998 Kluwer Academic Publishers
About this entry
Cite this entry
Herschy, R.W. (1998). Velocity-area method. In: Herschy, R.W., Fairbridge, R.W. (eds) Encyclopedia of Hydrology and Water Resources. Encyclopedia of Earth Science. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-4497-7_228
Download citation
DOI: https://doi.org/10.1007/978-1-4020-4497-7_228
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-412-74060-2
Online ISBN: 978-1-4020-4497-7
eBook Packages: Springer Book Archive