NEN EN ISO 748 : 2007
Current
The latest, up-to-date edition.
HYDROMETRY - MEASUREMENT OF LIQUID FLOW IN OPEN CHANNELS USING CURRENT-METERS OR FLOATS
01-12-2013
1 Scope
2 Normative references
3 Definitions
4 Principle of the methods of measurements
5 Selection and demarcation of site
6 Measurement of cross-sectional area
7 Measurement of velocity
8 Computation of discharge
9 Uncertainties in flow measurement
Annex A - Correction for sag, pull, slope and temperature
in measurement of cross-section width by tape or
wire
Annex B - Measurement across the cross-section
Annex C - Corrections for wetted length of wire when
measuring depths with wire not normal to surface
Annex D - Correction for drift
Annex E - Uncertainty of a velocity-area measurement
Annex F - Determination of mean velocity from float
measurements
Annex G - Bibliography
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