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Evidence Guide: NWPHYD011 - Measure and process low and medium flows using area velocity methods

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

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NWPHYD011 - Measure and process low and medium flows using area velocity methods

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to collect discharge data

  1. Identify the monitoring objective of the site and gauging requirements.
  2. Identify, analyse and confirm the data collection method required by the organisation.
  3. Select appropriate equipment and confirm site conditions are within instrument specifications.
  4. Verify calibration and maintenance status.
  5. Evaluate site conditions and prepare for taking measurements.
  6. Identify possible influences on discharge measurement.
  7. Select the cross-section for discharge measurement.
Identify the monitoring objective of the site and gauging requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify, analyse and confirm the data collection method required by the organisation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select appropriate equipment and confirm site conditions are within instrument specifications.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Verify calibration and maintenance status.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Evaluate site conditions and prepare for taking measurements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify possible influences on discharge measurement.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select the cross-section for discharge measurement.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Collect depth and velocity data

  1. Measure the width of the section.
  2. Select appropriate sounding points (verticals) to subdivide the cross-section.
  3. Measure the depth of vertical.
  4. Select method to suit the ambient conditions and flow.
  5. Collect velocity data at appropriate depth(s) for each vertical.
Measure the width of the section.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select appropriate sounding points (verticals) to subdivide the cross-section.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Measure the depth of vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select method to suit the ambient conditions and flow.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Collect velocity data at appropriate depth(s) for each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate discharge

  1. Calculate the point velocity.
  2. Calculate the mean velocity for each vertical.
  3. Calculate the area of subsection corresponding to each vertical.
  4. Calculate the discharge corresponding to each subsection.
  5. Calculate the area and discharge at the section by summation of the subsection data.
  6. Apply corrections for oblique flow as required.
Calculate the point velocity.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the mean velocity for each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the area of subsection corresponding to each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the discharge corresponding to each subsection.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the area and discharge at the section by summation of the subsection data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply corrections for oblique flow as required.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete recording and reporting requirements for discharge measurement

  1. Gather supporting information from the site and complete documentation.
  2. Calculate and record the mean stage height and rate of change using relevant mathematical techniques.
  3. Grade and record the gauging quality.
  4. Check records.
  5. Enter gauging into ratings database.
Gather supporting information from the site and complete documentation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate and record the mean stage height and rate of change using relevant mathematical techniques.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Grade and record the gauging quality.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Check records.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Enter gauging into ratings database.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare to collect discharge data

  1. Identify the monitoring objective of the site and gauging requirements.
  2. Identify, analyse and confirm the data collection method required by the organisation.
  3. Select appropriate equipment and confirm site conditions are within instrument specifications.
  4. Verify calibration and maintenance status.
  5. Evaluate site conditions and prepare for taking measurements.
  6. Identify possible influences on discharge measurement.
  7. Select the cross-section for discharge measurement.
Identify the monitoring objective of the site and gauging requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify, analyse and confirm the data collection method required by the organisation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select appropriate equipment and confirm site conditions are within instrument specifications.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Verify calibration and maintenance status.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Evaluate site conditions and prepare for taking measurements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify possible influences on discharge measurement.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select the cross-section for discharge measurement.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Collect depth and velocity data

  1. Measure the width of the section.
  2. Select appropriate sounding points (verticals) to subdivide the cross-section.
  3. Measure the depth of vertical.
  4. Select method to suit the ambient conditions and flow.
  5. Collect velocity data at appropriate depth(s) for each vertical.
Measure the width of the section.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select appropriate sounding points (verticals) to subdivide the cross-section.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Measure the depth of vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select method to suit the ambient conditions and flow.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Collect velocity data at appropriate depth(s) for each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate discharge

  1. Calculate the point velocity.
  2. Calculate the mean velocity for each vertical.
  3. Calculate the area of subsection corresponding to each vertical.
  4. Calculate the discharge corresponding to each subsection.
  5. Calculate the area and discharge at the section by summation of the subsection data.
  6. Apply corrections for oblique flow as required.
Calculate the point velocity.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the mean velocity for each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the area of subsection corresponding to each vertical.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the discharge corresponding to each subsection.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate the area and discharge at the section by summation of the subsection data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply corrections for oblique flow as required.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete recording and reporting requirements for discharge measurement

  1. Gather supporting information from the site and complete documentation.
  2. Calculate and record the mean stage height and rate of change using relevant mathematical techniques.
  3. Grade and record the gauging quality.
  4. Check records.
  5. Enter gauging into ratings database.
Gather supporting information from the site and complete documentation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate and record the mean stage height and rate of change using relevant mathematical techniques.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Grade and record the gauging quality.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Check records.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Enter gauging into ratings database.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to collect discharge data

1.1 Identify the monitoring objective of the site and gauging requirements.

1.2 Identify, analyse and confirm the data collection method required by the organisation.

1.3 Select appropriate equipment and confirm site conditions are within instrument specifications.

1.4 Verify calibration and maintenance status.

1.5 Evaluate site conditions and prepare for taking measurements.

1.6 Identify possible influences on discharge measurement.

1.7 Select the cross-section for discharge measurement.

2. Collect depth and velocity data

2.1 Measure the width of the section.

2.2 Select appropriate sounding points (verticals) to subdivide the cross-section.

2.3 Measure the depth of vertical.

2.4 Select method to suit the ambient conditions and flow.

2.5 Collect velocity data at appropriate depth(s) for each vertical.

3. Calculate discharge

3.1 Calculate the point velocity.

3.2 Calculate the mean velocity for each vertical.

3.3 Calculate the area of subsection corresponding to each vertical.

3.4 Calculate the discharge corresponding to each subsection.

3.5 Calculate the area and discharge at the section by summation of the subsection data.

3.6 Apply corrections for oblique flow as required.

4. Complete recording and reporting requirements for discharge measurement

4.1 Gather supporting information from the site and complete documentation.

4.2 Calculate and record the mean stage height and rate of change using relevant mathematical techniques.

4.3 Grade and record the gauging quality.

4.4 Check records.

4.5 Enter gauging into ratings database.

Required Skills and Knowledge

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to collect discharge data

1.1 Identify the monitoring objective of the site and gauging requirements.

1.2 Identify, analyse and confirm the data collection method required by the organisation.

1.3 Select appropriate equipment and confirm site conditions are within instrument specifications.

1.4 Verify calibration and maintenance status.

1.5 Evaluate site conditions and prepare for taking measurements.

1.6 Identify possible influences on discharge measurement.

1.7 Select the cross-section for discharge measurement.

2. Collect depth and velocity data

2.1 Measure the width of the section.

2.2 Select appropriate sounding points (verticals) to subdivide the cross-section.

2.3 Measure the depth of vertical.

2.4 Select method to suit the ambient conditions and flow.

2.5 Collect velocity data at appropriate depth(s) for each vertical.

3. Calculate discharge

3.1 Calculate the point velocity.

3.2 Calculate the mean velocity for each vertical.

3.3 Calculate the area of subsection corresponding to each vertical.

3.4 Calculate the discharge corresponding to each subsection.

3.5 Calculate the area and discharge at the section by summation of the subsection data.

3.6 Apply corrections for oblique flow as required.

4. Complete recording and reporting requirements for discharge measurement

4.1 Gather supporting information from the site and complete documentation.

4.2 Calculate and record the mean stage height and rate of change using relevant mathematical techniques.

4.3 Grade and record the gauging quality.

4.4 Check records.

4.5 Enter gauging into ratings database.

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. The candidate must be assessed in at least one of the area velocity methods listed in the Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

assessing risks and taking appropriate precautions and/or actions

maintaining testing equipment in good order and calibrating

interpreting and applying technical documentation

using surveying equipment to identify site location

performing basic mathematical calculations using safety equipment and personal protective equipment

identifying potential or actual operational problems

communicating with employees and customers

using computer and communication systems

giving and receiving instructions

collecting discharge data

gathering, interpreting and applying complex documentation related to the specification of hydrographic data collection and reporting procedures

collecting samples

analysing and verifying data using standard procedures, software and databases

preparing reports

storing and archiving data

identifying, reporting and solving potential or actual problems within scope of job function

positioning equipment

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the depth of knowledge demonstrated must be appropriate to the job context of the candidate.

limitations of the system principle of areavelocity measurement of discharge

turbulent and laminar flow

equipment testing procedures

WHS procedure

characteristics of a suitable section for wading and boat gauging and how to make modifications

Range Statement

Area velocity methods include:

Doppler velocity meter

acoustic Doppler current profiler

electromagnetic current meter

mechanical current meter