NWPHYD002 — Apply principles of open channel hydraulics
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What an assessment for NWPHYD002 must cover
72 assessable components: 5 elements (20 performance criteria), 15 performance evidence and 37 knowledge evidence requirements. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.
Elements & performance criteria
1 Select open channel hydraulic methodology
- 1.1Identify monitoring objectives of the site and hydraulic calculation requirements
- 1.2Select methodology for open channel hydraulic calculations
- 1.3Identify hydraulic principles used for verification of calculations
- 1.4Select other methodologies to review initial calculations
2 Collect and review data for flow calculations
- 2.1Measure and collect appropriate data to calculate theoretical flows based on methodology selected
- 2.2Determine the hydraulic characteristics of a monitoring site
- 2.3Measure and collect appropriate data to calculate flows theoretically
- 2.4Estimate hydraulic coefficients based on observations
- 2.5Prepare records in a format suitable for dissemination
- 2.6Review data collected and subsequent calculations for inconsistencies against measured flows
3 Select the appropriate control structure
- 3.1Select appropriate control structures based on characteristics of the open channel and its catchment
- 3.2Identify and determine the method to calculate flow by using the appropriate formulae for the control structure
4 Calculate flow in open channels
- 4.1Select and use the appropriate formulae for calculating flows in open channels based on the characteristics of the open channel and its catchment
- 4.2Identify the limitations of the formulae
- 4.3Identify factors that would cause variations in the results
- 4.4Verify results by applying hydraulic principles and other methodologies
- 4.5Determine the characteristics of open channel pipe flow
5 Calculate flow from pressure measurements
- 5.1Determine flow-based calculations by using pressure instruments
- 5.2Make adjustments for absolute pressure instruments to measure head in open channels
- 5.3Make corrections in pressure measurements to allow for head measurement of salt water
Performance evidence
- checking data for inconsistency against measured flows
- identifying types of flows
- interpreting and applying technical documentation to the collection, analysis and reporting of hydrometric data
- presenting calculations and disseminating information
- calculating hydraulic energy gradients
- calculating minor energy losses associated with enlargements, contractions and bends
- calculating the gradual varied flow profiles in uniform channels when the discharge is known
- drawing velocity distribution curves for fluids in pipes or channels with both laminar flow and turbulent flow
- using data to determine the value of roughness
- using simple equations for determining channel friction with their appropriate application
- using recording and reporting systems
- using surveying techniques
- estimating calculations based on observations
- using continuity equations
- using technology to perform high level calculations for channel hydraulics
Knowledge evidence
- applications and characteristics of notches and weirs, including type of the crest, shape of the notch, crest and conditions
- critical
- laminar
- state of open channel flow
- steadiness
- subcritical and supercritical flow
- transitional and turbulent flow
- types of data including photographic, surveying, long-section and cross-section, topographic maps and historical
- types of open channel
- uniformity
- effect of velocity variation on velocity head
- backwater
- characteristics of open channel pipe flow
- critical flow
- distinction between laminar and turbulent flow
- full pipe flow
- laminar flow
- rapidly changing flow
- smooth, rough pipe and channel surfaces
- subcritical and supercritical flow
- submerged flow conditions
- turbulent flow
- uniform flow
- weir and flumes behaviour under various flow conditions
- estimating calculations
- fluid dynamics
- hydraulic mechanics
- measuring and collecting data
- principles of fluid statics
- application of matrix algebra to systems of linear equations
- Bernoulli’s equation
- Darcy–Weisbach equation
- equations for calculating the approximate value of the friction factor, the characteristics of flow through notches/weirs, including the use of these in channel flow measurement
- graphical and algebraic methods for solving systems of linear, quadratic, exponential, logarithmic and trigonometric equations
- Hagen–Poiseuille equation
- limitations of formulae
- Pascal’s law and hydrostatic effect on submerged surfaces
Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.
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Questions about assessing NWPHYD002
What does an assessment tool for NWPHYD002 need to cover?
To satisfy the Principles of Assessment and Rules of Evidence, an assessment for NWPHYD002 needs to address all 72 unit components: 5 elements with 20 performance criteria, 15 performance evidence requirements, 37 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.
How does Auditori generate an assessment tool for NWPHYD002?
Auditori pulls the current release of NWPHYD002 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.
Is the first assessment tool really free?
Yes. Every new account includes one free credit — enough to generate the complete assessment tool for NWPHYD002 — with no card and no subscription required. After that it's pay-as-you-go per unit.
Can I check my existing NWPHYD002 assessment instead of generating a new one?
Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of NWPHYD002, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.
Related units
- NWPHYD003 — Develop and maintain ratings
- NWPHYD004 — Plan water resource management
- NWPHYD005 — Process and report hydrographic time series data
- NWPHYD006 — Measure discharge and process discharge data using a range of methods and equipment
- NWPHYD007 — Measure discharge using wading method
- NWPHYD008 — Operate, maintain and decommission monitoring sites
- NWPHYD009 — Undertake surveying of monitoring sites
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