Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method

Importancia y uso:

5.1 This test method is particularly useful for determining the discharge when it cannot be measured directly (such as during high flow conditions) by some type of current meter to obtain velocities and with sounding weights to determine the cross section (refer to Test Method D3858). This test method requires only one high-water elevation, unlike the slope-area test method that requires numerous high-water marks to define the fall in the reach. It can be used to determine a stage-discharge relation without data from several high-water events.

5.1.1 The user is encouraged to verify the theoretical stage-discharge relation with direct current-meter measurements when possible.

5.1.2 To develop a rating curve, plot stage versus discharge for several discharges and their computed stages on a rating curve together with direct current-meter measurements.

Subcomité:

D19.07

Referida por:

D5674-22, D5541-24

Volúmen:

11.01

Número ICS:

17.220.20 (Measurement of electrical and magnetic quantities)

Palabras clave:

flood; open channel flow; water discharge;