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ASTM D 3858 Document Information:
Title
Standard Test Method for Open-Channel Flow Measurement of Water by Velocity-Area Method
ASTM International
Publication Date:
Sep 10, 1995
Scope:
This test method covers the measurement of the volume rate of flow of
water in open channels by
determining the flow velocity and cross-sectional area and computing
the discharge therefrom (Refs
(1-7)).
The procedures described in this test method are widely used by those
responsible for the
collection of streamflow data, for example, the U.S. Geological
Survey, Bureau of Reclamation, U.S.
Army Corps of Engineers, U.S. Department of Agriculture, Water Survey
Canada, and many state and
provincial agencies. The procedures are generally from internal
documents of the above listed
agencies, which have become the defacto standards as used in North
America.
This test method covers the use of current meters to measure flow
velocities. Discharge
measurements may be made to establish isolated single values, or may
be made in sets or in a series
at various stages or water-level elevations to establish a
stage-discharge relation at a site. In
either case, the same test method is followed for obtaining field data
and computation of
discharge.
Measurements for the purpose of determining the discharge in
efficiency tests of hydraulic turbines
are specified in International Electrotechnical Commission Publication
41 for the field acceptance
tests of hydraulic turbines, and are not included in this test method.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- discharge measurement
- open channel flow
- water discharge
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