AWMA were engaged by civil construction company Rokon Pty Ltd for a Melbourne Water Wetland Management Project.
A custom manufactured side winding penstock valve was specifically designed for Melbourne Water to use in wetland outfall pits, to provide an adjustable ‘Extended Detention Depth’ (EDD) control.
To maximise the wetland aquatic and margin plant survival through the establishment period, the penstock is kept in the fully open position initially and then gradually adjusted as the plants establish, to achieve the design intent of “Extended Detention Time’ (EDT) of approximately 72 hours.
Melbourne Water advised that the adjustable EDD control concept is intended to replace the orifice baffle plate concept that offers no adjustability and is potentially prone to blockages which generally leads to substantial aquatic and margin plant losses.
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