Elements and Performance Criteria

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Standard processes and software may include:
standards relevant to the monitoring network including AS 3778 for discharge ratings, WMO, best practice methodology where standards are not available or applicable
procedures for the measurement of surface slopes and flood slopes
procedures for the development, maintenance and extension of rating curves
computation of flow from stage data and rating curves
software:
Kisters - Hydstra
Scientific Software Group - AquaChem,
Microsoft - Excel
web-based development tools for presentation and reporting of data
Flow conditions will include:
laminar flow
turbulent flow
smooth and rough pipe and channel surfaces
full pipe flow
submerged flow conditions
backwater
critical flow, sub critical and supercritical
uniform flow
rapidly changing flow
weir and flumes behaviour under various flow conditions
Charts include:
Colebrook-White charts
Hazen and Williams charts
Manning charts
Roughness coefficients include:
biological growths and other obstructions
slime deposits
incrustations
detritus
general debris
deterioration of unlined ferrous surfaces, because the bore may be diminished by oxide formations
irregularities at joints:
eccentricity
abrupt decrease of diameter
protrusions of mortar or other jointing materials
inadequate closure, especially if this has permitted tree roots to enter
amount and size of solids being transported
disturbances by flow from branch lines especially in sewers
Methods used for measuring flows include:
container method
tilt tank method
trajectory method
Formulae for calculating flows includes:
Chezy equation
Colebrook-White
Hazen and Williams
Darcy-Weisbach
Manning equation
Characteristics of open channels include:
types of open channel
steadiness
uniformity
state of open channel flow
laminar, transitional and turbulent flow
critical, subcritical and supercritical flow
Meters include:
mechanical meters such as:
the displacement type
the inferential type
pressure meters such as:
pitot tube
orifice plate
Venturi meter
Characteristics of notches and weirs will include:
type of the crest
shape of the notch
crest and conditions
Hydraulic principles will include:
standards relevant to the monitoring network including AS 3778 Measurement of water flow in open channels and AS 2200 Design Charts for water supply and sewerage for calculating pipe and channel flows
Archimedes's Principle
Bernoulli's Equation
Newton's Laws of Motion
hydraulic gradient and total energy line
boundary layer theory
Reynold's Number
Pascal's Law
theory of gated structures
hydrostatic pressure
fluid dynamics
Moody Diagram
Manning's Formula
Chezy's Formula
specific energy formula
Darcy-Weisbach Equation
Hagen-Poisseulle Equation

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The candidate should demonstrate the ability to use a range of hydraulics principles and calculations of theoretical flows including:
calculating energy in pipe flows
calculating hydraulic and energy gradient for pipelines
calculating flow in open channels
calculating flows through notches and weirs
calculating proportions for an economic section
Context of and specific resources for assessment
Access to the workplace and resources including:
documentation that should normally be available in a water industry organisation
relevant codes, standards, and government regulations
Where applicable, physical resources should include equipment modified for people with disabilities.
Access must be provided to appropriate learning and/or assessment support when required.
Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed.
Validity and sufficiency of evidence requires that:
competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice
a decision of competence should only be made when the assessor has complete confidence in the person's competence over time and in various contexts
all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence
where assessment is for the purpose of recognition (RCC/RPL), the evidence provided will need to be authenticated and show that it represents competency demonstrated over a period of time
assessment can be through simulated project-based activity and must include evidence relating to each of the elements in this unit
Questioning will be undertaken in a manner appropriate to the skill levels of the operator, any cultural issues that may affect responses to the questions, and reflecting the requirements of the competency and the work being performed.