Elements and Performance Criteria
- Evaluate design parameters.
- Client requirements are determined from plans, specifications and client briefs.
- Local government, Environment Protection Authority (EPA), and Australian and New Zealand standards for the design of complex stormwater and roof drainage systems are interpreted.
- Regulatory requirements for design of complex stormwater and roof drainage systems are analysed and applied.
- Other documentation relevant to the design is researched, evaluated and applied.
- Plan system components.
- Layout of system components is planned according to design parameters and site limitations, and is coordinated with other services.
- Stormwater diversion valve systems and first-flush stormwater systems are planned and evaluated.
- Most suitable methods of preventing backflow of sub-soil and stormwater into buildings are determined and specified.
- Treatment and disposal options for stormwater discharge are evaluated and planned.
- Design and size systems.
- Rainfall intensities are determined and volumes of water are estimated using measurements of different catchment areas.
- Methods of collection and disposal of surface run-off water are specified.
- Strategies for harvesting and re-using rainwater are identified and evaluated.
- Sub-soil water types are determined and stormwater drainage systems are designed, sized and detailed using appropriate software applications.
- System components are selected, designed, sized and detailed using appropriate software applications and appropriate approved materials are analysed and selected.
- Stormwater systems requiring pumping are identified and designed using appropriate software applications, with pump and discharge pipe sizes calculated and specified.
- Correct installation, laying and jointing procedures for materials and components are specified.
- Prepare documentation.