Major Design Flashcards
What is the scope of major drainage system?
Surface flow paths along road network.
Floodway reserves
Floodplain reserves along established waterways
Retarding basins
Road flow capacity equation
Manning’s equation Q=(AR^0.67S^0.5)/n
Retrofitting in developed areas are caused by and done by?
Inadequate planning in the first instance
Changes over time(increased imperviousness above predicted)
Retrofit works funded by rates or redevelopment drainage scheme
Require on-site Detention
On-site requirements
On site detention;
Flow detention within individual properties( small regarding basins and specially-designed rainwater tanks)
Requirement is specified as either storage volume or maximum flow rate.
retarding basin purpose and location
Installed in public open space eg. Football ovals
Detain flow to mitigate peak flow
Drainage schemes
Plan of major drainage components, with costings and contributions
Other considerations for RB
Public use-availability for sporting activities (consider for inundation frequency)
Public safety-max depth, fill rate, velocity; slopes
Integration of water quality, environmental, habitat objectives
What is emphasis through major design and why?
What does major systems rely on?
Planning. Planning is needed to protect plow paths from development.
Overland flow paths.
