Collect, measure and process hydrometric stream discharge gauging

Formats and tools

Unit Description
Reconstruct the unit from the xml and display it as an HTML page.
Assessment Tool
an assessor resource that builds a framework for writing an assessment tool
Assessment Template
generate a spreadsheet for marking this unit in a classroom environment. Put student names in the top row and check them off as they demonstrate competenece for each of the unit's elements and performance criteria.
Assessment Matrix
a slightly different format than the assessment template. A spreadsheet with unit names, elements and performance criteria in separate columns. Put assessment names in column headings to track which performance criteria each one covers. Good for ensuring that you've covered every one of the performance criteria with your assessment instrument (all assessement tools together).
Wiki Markup
mark up the unit in a wiki markup codes, ready to copy and paste into a wiki page. The output will work in most wikis but is designed to work particularly well as a Wikiversity learning project.
Evidence Guide
create an evidence guide for workplace assessment and RPL applicants
Competency Mapping Template
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners. A template for developing assessments for a unit, which will help you to create valid, fair and reliable assessments for the unit, ready to give to trainers and students
Observation Checklist
create an observation checklist for workplace assessment and RPL applicants. This is similar to the evidence guide above, but a little shorter and friendlier on your printer. You will also need to create a seperate Assessor Marking Guide for guidelines on gathering evidence and a list of key points for each activity observed using the unit's range statement, required skills and evidence required (see the unit's html page for details)

Self Assessment Survey
A form for students to assess thier current skill levels against each of the unit's performance criteria. Cut and paste into a web document or print and distribute in hard copy.
Moodle Outcomes
Create a csv file of the unit's performance criteria to import into a moodle course as outcomes, ready to associate with each of your assignments. Here's a quick 'how to' for importing these into moodle 2.x
Registered Training Organisations
Trying to find someone to train or assess you? This link lists all the RTOs that are currently registered to deliver NWP421A, 'Collect, measure and process hydrometric stream discharge gauging'.
Google Links
links to google searches, with filtering in place to maximise the usefulness of the returned results
Reference books for 'Collect, measure and process hydrometric stream discharge gauging' on This online store has a huge range of books, pretty reasonable prices, free delivery in Australia *and* they give a small commission to for every purchase, so go nuts :)

Elements and Performance Criteria



1Identify flow gauging.

1.1 Identify stream discharge and factors affecting accuracy.

1.2 Identify the purposes of gauging and gaugingmethodologies.

1.3 Identify the area velocitymethods for calculating discharge.

1.4 Identify hazards and hazard management principles according to occupational health and safety requirements.

2Collect depth and velocity data.

2.1 Take measurements during gauging following occupational health and safety procedures.

2.2 Select verticals for measurement of velocity.

2.3 Select suitable gauging equipment according to the conditions of the location, assignment and client requirements and gauging site conditions.

2.4 Prepare the equipment and gauging site.

2.5 Apply a range of suitable and alternative methods for obtaining the mean velocity in a vertical.

2.6 Apply the mid section and mean section methods.

2.7 Position the current meter according to guidelines.

2.8 Select the appropriate discharge measurement method.

2.9 Calculate the depth settings and point velocity using required mathematical techniques.

3Calculate discharge.

3.1 Apply corrections for oblique flows and drift angles.

3.2 Calculate the mean velocity for each vertical.

3.3 Calculate the area and discharge corresponding to each sub-section.

3.4 Calculate the discharge using the mid section and mean section method.

3.5 Calculate and record the mean stage and rate of change.

3.6 Calculate the channel storage and time of travel effects.

4Report discharge readings.

4.1 Compare the discharge measurements with the current rating.

4.2 Record the percentage deviation from the rating.

4.3 Grade and record the gauging quality with interpretation comments.

4.4 Gather supporting information from the site and document accurately according to organisation requirements.

4.5 Enter gauging into ratings database according to organisation requirements.

Qualifications and Skillsets

NWP421A appears in the following qualifications:

  • NWP40107 - Certificate IV in Water Operations