Property and Infill Development Drainage
This follow-up to the Introduction to DRAINS workshop concentrates on small to medium sized drainage systems. It covers Australian design methods for roof and property drainage, and for on-site stormwater detention (OSD) storages. It also deals with drainage design in cases where existing developments, infrastructure and exposure to flooding impose constraints on developers.
This workshop is targeted at designers of building services and infill properties who have completed the Introduction to DRAINS workshop, or who have working experience of DRAINS.
- An overview of design requirements for roof and property drainage systems,
- Methods from Standard Australia’s AS/NZS 3500.3,
- Review of property and inter-allotment drainage system examples modelled in DRAINS,
- Review of on-site stormwater detention (OSD) requirements,
- Calculation of storage volumes and hydraulics of weirs and orifices,
- Detention routing calculations and problems of modelling complex outlets, special weir and orifice tools in DRAINS premium hydraulic model,
- Infiltration from storages such as absorption trenches,
- Stormwater retention, high early discharge and pumped systems,
- An overview of design requirements for infill drainage systems, and constraints that are encountered, such as existing services, limited space for construction and high tailwater levels,
- Connections to undersized existing drainage systems,
- Flooding problem locations in existing areas, implications for councils and for property developers, and
- DRAINS exercises involving a re-development project and investigation of remedies for a flooding ‘trouble spot’.
The workshop will provide participants with the skills to:
- understand design requirements applying to property drainage systems in Australia,
- model surface and pipe drainage on properties using DRAINS,
- model and size OSD systems,
- understand the complexities of designing infill systems,
- use DRAINS to develop solutions for developments in flood-affected sites, and
- know how to apply the premium hydraulic model in situations that are otherwise difficult to analyse.