ASTM D5541-94(2014)
Standard Practice for Developing a Stage-Discharge Relation for Open Channel Flow

Standard No.

ASTM D5541-94(2014)

Release Date

1994

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D5541-94(2014)

Scope

5.1 This practice is particularly useful for determining the discharge at a gaging station or a location where discharge information is repeatedly needed.

5.2 This practice is applicable only for open-channel flow conditions where channel hydraulics permit a stable relation between stage and discharge.

1.1 This practice covers the development of a curve relating stage (elevation) to discharge. Standard test methods have been documented for measuring discharge and for measuring stage (see Practice D3858, and Test Methods D5129, D5130, D5243, D5388, and D5413). This practice takes the discharge and stage determined by each respective test method and shows a relation between them using a curved line. This curved line is called a stage-discharge relation or rating curve.

1.2 The procedures described in this practice are used commonly by those responsible for investigations of streamflow, for example, the U.S. Geological Survey, Army Corps of Engineers, Bureau of Reclamation, and U.S Agriculture Research Service. For the most part, these procedures are adapted from reports of the U.S. Geological Survey.^2,3

1.3 The procedures described in this practice apply only to simple freely flowing open-channel flow. Ratings for complex hydraulic conditions of extremely low slope channels using multiple-stage inputs, channels affected by man-induced regulation, or tidal conditions are not described. These types of ratings are described in detail in the documents listed in Footnotes 2 and 3.^2,3

1.4 This practice uses the results of current-meter discharge measurements or indirect discharge measurements and the corresponding measured stage to define as much of the stage-discharge relation curve as possible. A theoretical curve is developed for the full range of stage and discharge to shape the curve.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.6 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 D5541-94(2014) Referenced Document

• ASTM D1129 Standard Terminology Relating to Water*， 1999-04-20 Update
• ASTM D3858 Standard Test Method for Open-Channel Flow Measurement of Water by Velocity-Area Method*， 1995-04-20 Update
• ASTM D5129 Standard Test Method for Open Channel Flow Measurement of Water Indirectly by Using Width Contractions*， 1995-04-20 Update
• ASTM D5130 Standard Test Method for Open-Channel Flow Measurement of Water Indirectly by Slope-Area Method*， 1995-04-20 Update
• ASTM D5243 Standard Test Method for Open-Channel Flow Measurement of Water Indirectly at Culverts*， 2019-11-01 Update
• ASTM D5388 Standard Test Method for Indirect Measurements of Discharge by Step-Backwater Method
• ASTM D5413 Standard Test Methods for Measurement of Water Levels in Open-Water Bodies
• ISO 1100-2 Hydrometry - Measurement of liquid flow in open channels - Part 2: Determination of the stage-discharge relationship*， 2010-12-01 Update

ASTM D5541-94(2014) history

• 1994 ASTM D5541-94(2014) Standard Practice for Developing a Stage-Discharge Relation for Open Channel Flow
• 1994 ASTM D5541-94(2008) Standard Practice for Developing a Stage-Discharge Relation for Open Channel Flow
• 1994 ASTM D5541-94(2003) Standard Practice for Developing a Stage-Discharge Relation for Open Channel Flow
• 1994 ASTM D5541-94(1998) Standard Practice for Developing a Stage-Discharge Relation for Open Channel Flow