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Evidence Guide: NWPHYD017 - Develop and maintain ratings

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!

From the Wiki University

 

NWPHYD017 - Develop and maintain ratings

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

Review individual measurements

  1. Identify monitoring objectives of site and stage discharge ratings requirements.
  2. Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.
  3. Use standard processes and software to check, edit and verify field data.
  4. Correct and adjust inconsistent data.
Identify monitoring objectives of site and stage discharge ratings requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use standard processes and software to check, edit and verify field data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Correct and adjust inconsistent data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves

  1. Analyse existing measurements to establish trends and compare with existing ratings.
  2. Identify events at monitoring site that can affect stage discharge curve.
  3. Identify sources of error in ratings.
  4. Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.
  5. Confirm and verify existing trend or define new trend.
  6. Develop rating curves that comply with industry and client requirements.
  7. Use theoretical methods to create or extend ratings.
  8. Document processes and observations to provide traceability and accountability for quality assurance.
  9. Apply standard formulae to create ratings for pre-calibrated measuring structures.
  10. Apply quality codes to rating curves.
Analyse existing measurements to establish trends and compare with existing ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify events at monitoring site that can affect stage discharge curve.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify sources of error in ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Confirm and verify existing trend or define new trend.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves that comply with industry and client requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use theoretical methods to create or extend ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Document processes and observations to provide traceability and accountability for quality assurance.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply standard formulae to create ratings for pre-calibrated measuring structures.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply quality codes to rating curves.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Maintain rating curves

  1. Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.
  2. Develop rating curves based on new information from reviews and changed conditions.
  3. Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.
  4. Document processes, observations and adjustments made.
Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves based on new information from reviews and changed conditions.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Document processes, observations and adjustments made.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report rating curves

  1. Prepare and store required archival data to guarantee data security.
  2. Prepare and disseminate ratings in accordance with client requirements.
  3. Make recommendations for future observations.
Prepare and store required archival data to guarantee data security.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare and disseminate ratings in accordance with client requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Make recommendations for future observations.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Review individual measurements

  1. Identify monitoring objectives of site and stage discharge ratings requirements.
  2. Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.
  3. Use standard processes and software to check, edit and verify field data.
  4. Correct and adjust inconsistent data.
Identify monitoring objectives of site and stage discharge ratings requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use standard processes and software to check, edit and verify field data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Correct and adjust inconsistent data.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves

  1. Analyse existing measurements to establish trends and compare with existing ratings.
  2. Identify events at monitoring site that can affect stage discharge curve.
  3. Identify sources of error in ratings.
  4. Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.
  5. Confirm and verify existing trend or define new trend.
  6. Develop rating curves that comply with industry and client requirements.
  7. Use theoretical methods to create or extend ratings.
  8. Document processes and observations to provide traceability and accountability for quality assurance.
  9. Apply standard formulae to create ratings for pre-calibrated measuring structures.
  10. Apply quality codes to rating curves.
Analyse existing measurements to establish trends and compare with existing ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify events at monitoring site that can affect stage discharge curve.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify sources of error in ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Confirm and verify existing trend or define new trend.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves that comply with industry and client requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use theoretical methods to create or extend ratings.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Document processes and observations to provide traceability and accountability for quality assurance.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply standard formulae to create ratings for pre-calibrated measuring structures.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply quality codes to rating curves.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Maintain rating curves

  1. Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.
  2. Develop rating curves based on new information from reviews and changed conditions.
  3. Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.
  4. Document processes, observations and adjustments made.
Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop rating curves based on new information from reviews and changed conditions.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Document processes, observations and adjustments made.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report rating curves

  1. Prepare and store required archival data to guarantee data security.
  2. Prepare and disseminate ratings in accordance with client requirements.
  3. Make recommendations for future observations.
Prepare and store required archival data to guarantee data security.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare and disseminate ratings in accordance with client requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Make recommendations for future observations.

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. Review individual measurements

1.1 Identify monitoring objectives of site and stage discharge ratings requirements.

1.2 Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.

1.3 Use standard processes and software to check, edit and verify field data.

1.4 Correct and adjust inconsistent data.

2. Develop rating curves

2.1 Analyse existing measurements to establish trends and compare with existing ratings.

2.2 Identify events at monitoring site that can affect stage discharge curve.

2.3 Identify sources of error in ratings.

2.4 Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.

2.5 Confirm and verify existing trend or define new trend.

2.6 Develop rating curves that comply with industry and client requirements.

2.7 Use theoretical methods to create or extend ratings.

2.8 Document processes and observations to provide traceability and accountability for quality assurance.

2.9 Apply standard formulae to create ratings for pre-calibrated measuring structures.

2.10 Apply quality codes to rating curves.

3. Maintain rating curves

3.1 Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.

3.2 Develop rating curves based on new information from reviews and changed conditions.

3.3 Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.

3.4 Document processes, observations and adjustments made.

4. Report rating curves

4.1 Prepare and store required archival data to guarantee data security.

4.2 Prepare and disseminate ratings in accordance with client requirements.

4.3 Make recommendations for future observations.

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. Review individual measurements

1.1 Identify monitoring objectives of site and stage discharge ratings requirements.

1.2 Review historical discharge measurements, time series data and stage discharge rating curves and compare against expected trends.

1.3 Use standard processes and software to check, edit and verify field data.

1.4 Correct and adjust inconsistent data.

2. Develop rating curves

2.1 Analyse existing measurements to establish trends and compare with existing ratings.

2.2 Identify events at monitoring site that can affect stage discharge curve.

2.3 Identify sources of error in ratings.

2.4 Prepare rating curves based on measurements, agreed formulae and mathematical techniques, under a variety of hydraulic conditions and control types.

2.5 Confirm and verify existing trend or define new trend.

2.6 Develop rating curves that comply with industry and client requirements.

2.7 Use theoretical methods to create or extend ratings.

2.8 Document processes and observations to provide traceability and accountability for quality assurance.

2.9 Apply standard formulae to create ratings for pre-calibrated measuring structures.

2.10 Apply quality codes to rating curves.

3. Maintain rating curves

3.1 Confirm accuracy of rating curves using recent measurements and review trends and rating applicability.

3.2 Develop rating curves based on new information from reviews and changed conditions.

3.3 Retrieve and analyse current, historic and trend data using appropriate mathematical techniques.

3.4 Document processes, observations and adjustments made.

4. Report rating curves

4.1 Prepare and store required archival data to guarantee data security.

4.2 Prepare and disseminate ratings in accordance with client requirements.

4.3 Make recommendations for future observations.

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

collecting, storing, archiving and analysing data

applying mathematical modelling and analytical tools

interpreting and applying technical documentation to the collection, analysis and reporting of hydrometric data

identifying and addressing potential or actual operational problems

recording information

interpreting a range of organisational documents

using computer systems to create ratings

using remote work communication systems

checking hydrographic data for correctness and accuracy in preparation for creating ratings

identifying characteristics of ratings appropriate to various cross-section types and flow

identifying errors in rating, and incorrect and impossible ratings

adjusting gaugings, hydrograph trace and ratings to a common datum

creating ratings manually using various methods and for standard measuring structures

developing rating techniques to handle seasonal rating changes

identifying the possibilities and limitations of scale models for generating ratings

identifying and recognising causes of progressive, cyclical and sudden rating changes

identifying backwater-affected stations and using techniques to rate them

identifying gradual stream changes and adopting rating techniques

identifying short-term rating changes, their causes and means of correctly processing them

applying Student’s t-test to determine whether a new rating is required

drawing an accurate rating by hand

fitting a rating curve using a number of mathematical techniques available in relevant software packages

identifying gross errors in ratings and the data used to compile them

applying appropriate quality codes to a rating

identifying the elements of a stream bed and channel that affect ratings

estimating channel roughness from photographs

calculating the overall roughness coefficient of a channel consisting of a number of elements

using graphical logarithmic methods to extend a rating

identifying appropriate sections to use for slope-area flow calculations

calculating flow rates manually using a set of cross-sections and a long-section

using a spreadsheet to perform calculations

calculating flow rates through and over various structures

establishing relationships between variables including stage versus flow and conductivity versus salinity

gathering and interpreting complex documentation and applying it to the development and maintenance of rating curves

identifying, reporting and providing solutions to a range of flow conditions

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.

mathematical and other scientific techniques relevant to the analysis of hydrographic data

Student’s t-test

elements of a stream bed and channel that affect the rating

relationship between Chezy and Manning roughness coefficients

computer software relevant to the analysis and archiving of hydrographic data

the basis of statistical goodness of fit tests

WHS procedures