Sanitation and Drainage Flashcards
Understanding how sanitation and drainage work
Which Approved Doc deals with drainage
Part H
How is foul air kept within the system?
Via water seal traps, which are very sensitive to pressure changes.
The lowest connection must be installed at a minimum of what height from the drain invert.
450mm
What is Suds drainage?
A departure from the traditional approach to draining sites.
What are the key principles that influence the planning and design process enabling SuDs to mimic natural drainage?
Storing runoff and releasing it slowly
Harvesting and using the rain close to where it falls
Allowing water to soak into the ground (infiltration)
Slowly transporting (conveying) water on the surface
Filtering out pollutants
Allowing sediments to settle out by controlling the flow of the water
What is a detention basin?
Surface storage basins or facilities that provide flow control through attenuation of stormwater runoff.
What are Swales?
Shallow, broad and vegetated channels designed to store and/or convey runoff and remove pollutants.
