ASTM D5388-93(2013)
Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method

Standard No.

ASTM D5388-93(2013)

Release Date

1993

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D5388-21

Latest

ASTM D5388-21

Scope

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 needing 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.

1.1 This test method covers the computation of discharge of water in open channels or streams using representative cross-sectional characteristics, the water-surface elevation of the upstream-most cross section, and coefficients of channel roughness as input to gradually-varied flow computations.²

1.2 This test method produces an indirect measurement of the discharge for one flow event, usually a specific flood. The computed discharge may be used to define a point on the stage-discharge relation.

1.3 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.

1.4 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.

ASTM D5388-93(2013) Referenced Document

• ASTM D1129 Standard Terminology Relating to Water*， 1999-04-20 Update
• ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water*， 1998-04-20 Update
• ASTM D3858 Standard Test Method for Open-Channel Flow Measurement of Water by Velocity-Area Method*， 1995-04-20 Update

ASTM D5388-93(2013) history

• 2021 ASTM D5388-21 Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method
• 1993 ASTM D5388-93(2013) Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method
• 1993 ASTM D5388-93(2007) Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method
• 1993 ASTM D5388-93(2002) Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method
• 1997 ASTM D5388-93(1997) Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method