Basic Design of Elsternwick Park Retardation Basin

The image below aims to explain the design of Elsternwick Park 'Retardation Basin' which was designed in the late 1990's by Melbourne Water.

Retardation Basin:
Works were undertaken in 1998 by Melbourne Water within Elsternwick Park area to provide flood attenuation capacity. The entire park area has been configured to function as a 100 year flood retardation basin which becomes engaged when the capacity of the Head Street diversion-drain (under Elsternwick Park South) is exceeded. A series of box culverts crosses beneath Bent Ave link the north and south portions of the Elsternwick Park retarding basin during 'full engagement'. The retarding basin is subsequently drained via the choked outlet (~30 m3/s) at the downstream end of Elster Creek and a grated opening into the Head Street drain immediately south of the existing Elsternwick Lake.

View of the 'Choking-Outlet', in the Golf Course, viewed from the east...