Water Journal : Water Journal May 2014
MAY 2014 WATER 37 Feature Article The award-winning Mordialloc Industrial Precinct project is the rst project in Australia where public infrastructure in an old industrial estate has been renewed with the aim of using harvested stormwater as a community asset. In 2005, the site was identi ed as an opportunity to trial a broad range of innovative water management solutions within an industrial streetscape. When the drainage network and roads around the site needed to be upgraded to prevent ooding, the council took the opportunity to implement a broader scope of stormwater management features. The project encompasses a seven-hectare industrial area located within the City of Kingston (26km from the Melbourne CBD), which abuts Mordialloc Creek, only 1.5km upstream from Port Phillip Bay (Figure 1). Three roads within the precinct were redesigned to harvest road runoff and stormwater from factory roofs to help protect a nearby creek, irrigate an adjacent park and street trees, and provide increased ood protection for nearby properties. DESIGN OVERVIEW: STORMWATER TREATMENT TRAIN AND HARVESTING PROCESS (FIGURE 2) The catchment (A) consists of three industrial roads, which were redesigned to harvest 4ML of stormwater each year from factory roofs and road runoff. The redesign included: • Installing two new drains along Beach Avenue and Spray Avenue; • Fitting 54 'King Trap' stormwater pits, speci cally developed by the City of Kingston to capture sediment and coarse pollutants, along the roads; • Covering a 330m2 area of road and carpark with porous pavement material: both interlocking porous pavers and in-situ poured paving were trialled. Two large gross pollutant traps (B) allow material bypassing the pits to be captured before the water enters the 187kL underground storage system (C), consisting of 61m of 2.4m diameter pipe (Figure 3). At this point, an outlet into Mordialloc Creek allows for water from large storm events to bypass the treatment system. Due to the very at site and the outfall being located below sea level, the outlet was equipped with an innovative rubber valve to prevent back ow during high tide (Figure 4). After initial storage, the water is pumped into a 180m2 bio- retention system (D), consisting of layers of engineered soil and sand. The plants in the raingarden treat the water by removing metals and nutrients. The treated water is then pumped back up into an above-ground 240kL storage tank (E), where it can be used for irrigation of street trees and a nearby turf wicket. CASE STUDY: INTEGRATING WATER-SENSITIVE URBAN DESIGN INTO AN INDUSTRIAL PRECINCT Katia Bratieres from Clearwater, and the City of Kingston, re ect on the opportunities, challenges and learnings from an innovative WSUD project at Mordialloc Industrial Precinct in Melbourne. Figure 1. Mordialloc Industrial Precinct abuts Mordialloc Creek. Figure 2. Schematic of stormwater treatment train and harvesting process at Mordialloc Industrial Precinct.
Water Journal April 2014
Water Journal June 2014