ASTM-D7512 Standard Guide for Monitoring of Suspended-Sediment Concentration in Open Channel Flow Using Optical Instrumentation

ASTM-D7512 - 2009 R15 EDITION - CURRENT
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Standard Guide for Monitoring of Suspended-Sediment Concentration in Open Channel Flow Using Optical Instrumentation
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Scope

1.1 This guide covers the equipment and basic procedures for installation, operation, and calibration of optical equipment as a surrogate for the continuous determination of suspended-sediment concentration (SSC) in open channel flow.

1.2 This guide emphasizes general principles for the application of optical measurements to be used to estimate suspended-sediment concentration (SSC) in water. Only in a few instances are step-by-step instructions given. Continuous monitoring is a field-based operation, methods and equipment are usually modified to suit local conditions. The modification process depends upon the operator skill and judgment.

1.3 This guide covers the use of the output from an optical instrument, such as turbidity and suspended-solids meters, to record data that can be correlated with suspended-sediment concentration. It does not cover the process of collecting data for continuous turbidity record, which would require additional calibration of the turbidity readings to the mean turbidity of the measurement cross section. For the purposes of this method it is assumed that the dependent variable will be mean cross-sectional suspended-sediment concentration data.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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

continuous measurement of SSC; optical measurements; sediment; sediment transport; stream monitoring; suspended-sediment concentration; suspended-sediment load; turbidity;; ICS Number Code 17.120.20 (Flow in open channels)

To find similar documents by ASTM Volume:

11.01 (Water (I))

To find similar documents by classification:

17.120.20 (Flow in open channels Including hydrometric determinations)

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Document Number

ASTM-D7512-09(2015)

Revision Level

2009 R15 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 1, 2015

Document Type

Guide

Page Count

14 pages

Committee Number

D19.07