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Evidence Guide: AHCDRG501A - Design drainage systems

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

 

AHCDRG501A - Design drainage systems

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

Determine design requirements

  1. Water transfer, recharge, reuse and harvesting systems are designed to conserve natural resources.
  2. The process of collecting or storing water does not degrade the water quality for the enterprise or the environment.
  3. Construction specifications define the work required to make suitable water available to the enterprise in accordance with environmental and Occupational Health and Safety (OHS) requirements.
  4. Environmentally sensitive areas are identified and protected according to local, State and National legislation.
  5. Design calculations and decisions are documented to enterprise requirements.
Water transfer, recharge, reuse and harvesting systems are designed to conserve natural resources.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The process of collecting or storing water does not degrade the water quality for the enterprise or the environment.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construction specifications define the work required to make suitable water available to the enterprise in accordance with environmental and Occupational Health and Safety (OHS) requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Environmentally sensitive areas are identified and protected according to local, State and National legislation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Design calculations and decisions are documented to enterprise requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Define pumping and power systems

  1. Pumps are selected to move water efficiently when needed to water storage or treatment, at the flow and pressure required to design specifications.
  2. The pump motor combinations are efficient, and the pumps are reliable, functional, serviceable and flexible for the intended application.
  3. Energy requirements are determined, and layout of electricity lines are determined and checked with local authority.
  4. The relationship between capital and operational costs are optimised including a comparison of energy sources.
  5. Structures, valves and accessories are selected and integrated into a functional system that can be monitored and maintained according to enterprise guidelines.
  6. Performance indicators, design calculations and decisions are documented according to enterprise guidelines.
  7. Construction specifications define work required to make suitable pumping and power system available to enterprise.
  8. Power supply design specification is checked with power authorities.
Pumps are selected to move water efficiently when needed to water storage or treatment, at the flow and pressure required to design specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The pump motor combinations are efficient, and the pumps are reliable, functional, serviceable and flexible for the intended application.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Energy requirements are determined, and layout of electricity lines are determined and checked with local authority.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The relationship between capital and operational costs are optimised including a comparison of energy sources.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Structures, valves and accessories are selected and integrated into a functional system that can be monitored and maintained according to enterprise guidelines.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Performance indicators, design calculations and decisions are documented according to enterprise guidelines.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construction specifications define work required to make suitable pumping and power system available to enterprise.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Power supply design specification is checked with power authorities.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Design a drainage system

  1. Regional geology and geography is investigated to predict drainage parameters.
  2. Site investigations to assess depth of clay, depth of ground water, soil and water salinity, and structural or chemical impediments are used to determine the most cost effective drainage system.
  3. Predictions of leaching fractions and salt movements are documented, and soil amelioration and drainage management plans are developed.
  4. The need for leachate interception and dewatering system is determined and if required, construction specification prepared for interception and collection, disposal, reuse or recycle.
  5. Drains and structures are capable of carrying the design water volumes and intensities according to enterprise standards.
  6. Damage from water logging is minimised according to enterprise standards.
  7. Hydrological calculations predict volumes and rates of surface run-off according to enterprise standards.
Regional geology and geography is investigated to predict drainage parameters.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Site investigations to assess depth of clay, depth of ground water, soil and water salinity, and structural or chemical impediments are used to determine the most cost effective drainage system.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Predictions of leaching fractions and salt movements are documented, and soil amelioration and drainage management plans are developed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The need for leachate interception and dewatering system is determined and if required, construction specification prepared for interception and collection, disposal, reuse or recycle.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Drains and structures are capable of carrying the design water volumes and intensities according to enterprise standards.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Damage from water logging is minimised according to enterprise standards.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Hydrological calculations predict volumes and rates of surface run-off according to enterprise standards.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine capital expense budget

  1. Design calculations and decisions are documented and relevant information is communicated clearly through plans, specifications and manuals.
  2. Design output is checked by a competent designer against enterprise objectives.
  3. Materials requirements are determined and documented from plans and specifications.
  4. Labour requirements are estimated based upon documented work schedule with reasonable allowance for variances in work schedules.
  5. Costing attributed to each component is based upon quoted information from suppliers, or sound analysis of individual elements.
Design calculations and decisions are documented and relevant information is communicated clearly through plans, specifications and manuals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Design output is checked by a competent designer against enterprise objectives.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Materials requirements are determined and documented from plans and specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Labour requirements are estimated based upon documented work schedule with reasonable allowance for variances in work schedules.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Costing attributed to each component is based upon quoted information from suppliers, or sound analysis of individual elements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine operating expense budge

  1. Operating expense budget indicates all expenses applicable to the completed drainage system.
Operating expense budget indicates all expenses applicable to the completed drainage system.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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.

Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The evidence required to demonstrate competency in this unit must be relevant to workplace operations and satisfy holistically all of the requirements of the performance criteria and required skills and knowledge and include achievement of the following:

develop specifications for water transfer, recharge, reuse and harvesting systems

assess the requirements for pumping capacity in a drainage system and power requirements

identify performance indicators for the drainage system

predict volumes and rates of surface run-off and system leakage

design a drainage system that factors in the characteristics of the irrigated landscape and soil.

Context of and specific resources for assessment

Competency requires the application of work practices under work conditions. Selection and use of resources for some worksites may differ due to the regional or enterprise circumstances.

Required Skills and Knowledge

Required skills

collect and analyse information

identify adverse environmental impacts of drainage and appropriate remedial action

identify design requirements

complete hydrological calculations

develop specifications

develop budgets

develop and implement relevant enterprise OHS and environmental procedures

use literacy skills to fulfil job roles as required by the organisation. The level of skill may range from reading and understanding documentation to completion of written reports

use oral communication skills/language competence to fulfil the job role as specified by the organisation including questioning, active listening, asking for clarification, negotiating solutions and responding to a range of views

use numeracy skills to estimate, calculate and record complex workplace measures

use interpersonal skills to work with others and relate to people from a range of cultural, social and religious backgrounds and with a range of physical and mental abilities.

Required knowledge

design processes

developments in drainage technology

leaching fractions and salt movements prediction

monitoring systems

waste management and environmental issues

purpose of leachate interception and dewatering systems

budgeting, contractual development and obligations

environmental impacts of drainage

cost/benefit analysis

enterprise policies and procedures

water transfer, recharge, reuse and harvesting systems.

OHS and environmental protection legislation.

Range Statement

The range statement relates to the unit of competency as a whole.

Irrigation system types may include:

flood

furrow

micro-sprinklers

pop-ups

impact sprinklers

low-level lines

overhead sprinklers

drippers

micro-jets.

Irrigated systems may involve:

water harvesting

delivery

drainage collection

drainage storage and treatment as well as natural drainage and treatment systems involving the removal of pollutants through evaporation, and/or clearance by filtration through surface layers.