Required skills

use area velocity method

assess hazards and apply relevant precautions and action

estimate and explain the anticipated vertical distribution

make calculations on depth and velocity

maintain the integrity of measurements

use a range of suitable techniques to accurately determine mean stage in rapidly changing situations

adjust measurements correctly

plot discharge measurements on organisations preferred scale

use formulae for determining the percentage deviation

use computing system and software to transfer calculated flows to office database

assemble and test metering equipment

check operation of equipment

check gauging section

set tag lines

prepare gauging section

Required knowledge

principles of discharge measurement

methods for calculating mean velocity in a vertical

methods for determining the cross sectional area at a site

alternative methods of discharge measurement

the organisations operating procedures for hydrometric stream discharge measurement

the timing location and number of verticals for stage readings

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

requirements for surface single and multipoint floats

basic mathematical principles for area and velocity measurements

correction procedures for horizontal angles

correction procedures for suspension measurements

techniques for monitoring stage changes during discharge measurement

weighted mean stage calculations

discharge and mean stage adjustment

technical components in calculating discharge

factors impacting on discharge measurements and the quality of the discharge

formulae to adjust gaugings

potential impacts of modifications of site method or equipment on discharge accuracy

confidence limits

function of each field on the measurement forms

the organisations registration procedures

calibration procedures

OHS procedures safe operation of equipment and identification of potential hazards

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 collect data using a range of discharge measuring methods and equipment including

measuring and calculating readings

interpreting and reporting data for a range of clients and stakeholders

gathering data related to client requirements

interpreting complex documentation and applying it to the specification of hydrometric data collection and reporting procedures

sampling accurately and consistently with client requirements

analysing and verifying data using standard procedures software and databases

preparing clear and accurate reports

storing and archiving data

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

Context of and specific resources for assessment

Access to the workplace and resources including

documentation that should normally be available in the workplace

workplace specific equipment and technology

supervision and experienced team members to provide observations feedback and third party reports

enterprise operating procedures and work allocation

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 andor assessment support when indicated by gaps in competency

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 require 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 persons 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 RCCRPL 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 projectbased activity and must include evidence relating to each of the elements in this unit

In all cases where practical assessment is used it will be combined with targeted questioning to assess the underpinning knowledge 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

Factors affecting accuracy may include:

Gauging methodologies may include:

Area velocity method may include:

Hazards may include:

Occupational health and safety requirements will include:

Gauging equipment may include:

Gauging site conditions may include:

Alternative methods may include:

Required mathematical techniques will include:

Percentage deviation will be determined by:

Supporting information will include:

Organisational requirements will include: