ISO/TS 24154:2005 is not applicable to measurement of liquid flow in small channels or partly-filled pipes using a single Doppler-based flowmeter at a fixed point in the cross section.

used to determine point velocity for the purpose of measuring flow in an open channel using the velocity area

method.

NOTE The electromagnetic current meter is acceptable as a device for making point determinations of velocity for the

purposes of open channel flow determination by the velocity area method, using the multiple point velocity sampling technique

described in ISO 748 (see reference [1] in the Bibliography).

The purposes of measuring bedload-transport rates are to

a) increase the accuracy of estimating total sediment load in rivers and deposition in reservoirs,

b) gain knowledge of bedload transport that cannot be completely measured by conventional suspended-sediment collection methods,

c) provide data to calibrate or verify theoretical transport models, and

d) provide information needed in the design of river diversion and entrainment structures.

NOTE The units of measurement used in this Technical Report are SI units.