Standard Test Method for Open-Channel Flow Measurement of Water Indirectly at Culverts

Importancia y uso:

5.1 This test method is particularly useful to determine the discharge when it cannot be measured directly with some type of current meter to obtain velocities and sounding equipment to determine the cross section. See Test Method D3858.

5.2 Even under the best of conditions, the personnel available cannot cover all points of interest during a major flood. The engineer or technician cannot always obtain reliable results by direct methods if the stage is rising or falling very rapidly, if flowing ice or debris interferes with depth or velocity measurements, or if the cross section of an alluvial channel is scouring or filling significantly.

5.3 Under flood conditions, access roads may be blocked, cableways and bridges may be washed out, and knowledge of the flood frequently comes too late. Therefore, some type of indirect measurement is necessary. The use of culverts to determine discharges is a commonly used practice.

Subcomité:

D19.07

Referida por:

D5674-22, D5541-24

Volúmen:

11.01

Número ICS:

17.120.20 (Flow in open channels)

Palabras clave:

floods; open-channel flow; water discharge;