NAME HAOYANG WANG DATE 13 June 2021 CLASS Constructed Ecologies Semester 1/2021, A. Felson Program Landscape Architecture, ABP
DESIGN STATEMENT The Darebin Parkland is a unique constructed ecological habitat adjacent to the Darebin Creek. The park constructed up on the original landfill site where the soil was heavily contaminated by the sewage containing hazard elements. At the moment, there is a leachate system functioning across the park for water purification and prevent sewage flowing into the creek. The on going management effort is to resolve the high salinity issue of the Duck Pond due to high evaporation rate. High concentration of salt in the water will threat the habitat biodiversity, block the water circulation result in brackish soil, reduction of genetic diversity and botulism. The design proposal for the Darebin Parkland suggests a more sustainable water management strategy, and bridge the urban and parkland hydrology system by green infrastructure. The design proposal is a green infrastructure network expanded out from the Darebin Parkland and stretch across several street blocks. This infrastructure system composes by rain gardens, industrial water treatment, runoff collection tank in the suburb and series of bio-filtration and and sedimentation ponds in the parkland. The street and rooftop run off will be filtrated by the rain garden network, there is a net of collection pipes under the rain garden network that will direct rain water to the edge of the parkland. The water will flow though a shallow sedimentation pond, that will trap sludge in the water. Before the Duckpond, there are two bio-filtration wetland to remove heavy metals in the runoff and retaining the storm water. In this way the parkland adopt resilient water management approach and there will be continuous fresh water supply into the pond. In the case of heavy rainfall the Duck pond will be able to release water into the Darebin creek, and the permeable soil, water tank and series of ponds will maintain the runoff water during drought season, produce comfortable climate across the suburb.
SITE CONTEXT
The mapping of the Darebin Parkland and its surrounding shows the existing drainage network and ecological circulation. There is a obvious gap between the city infrastructure and the parkland’s infrastructure since the surrounding area completly modified, and urban expasion also led to habitat fragmentation
NAME Haoyang Wang DATE 13 June 2021 CLASS Constructed Ecologies Semester 1/2021, A. Felson PROPOSED RAINGARDEN NETWORK
PROPOSED WSUD VEGETATION CORRIDOR SITE PLAN 1:10000
PROPOSED DRAINAGE NETWORK SITE PLAN 1:10000
C
C’
EXISTING DRAINAGE SYSTEM SITE PLAN 1:10000
SITE PLAN 1:10000 The diagrams above shows the overlay of the designed network. The design aiming to achieve Add caption here high level of sustainability and water resilience. The rain garden corridor designed to direct ground and rooftop runoff into the parkland inorder to solve the salinity issue of the Duck Pond . Meanwhile the proposed green network will encourage habitat mobility .
Existing Drainage
Tree Corridor
Water Treatment
WSUD Planting
Design Drainage
Vegetation Patch
Rain Garden
Lawn
Water Treatment (Industrial)
The plan was drawn to scale 1:2000 that include a large part of the parkland surrounding residential area. It speculates the design solution under extreme climate change, and how the water can be used to reduce urban heatisland
Industrial Area
SITE PLAN 1:2000
NAME Haoyang Wang DATE 13 June 2021 CLASS Constructed Ecologies Semester 1/2021, A. Felson SECTION: AA’ RAIN GARDEN CORRIDOR
The section page shows the possible opportunities and design solutions in both residential and parkland areas. There are three sections was drawn to explain the spatial quality and functionality. The final section shows how the WSUD network system work aross the suburb , and how the water transported .The strategies in the urban area include roof top runofff collection, ground water filtration and collection pipe under the rain garden. The corridor will improve the atmosphere comfort under extreme heat. The water tank collect runoff for home use and some of the water will be direct into the rain gardens .
THE BIO FILTRATION PONDS
A
A’
SCALE 1:2000 ZOOM IN PLAN A SECTION: BB’ BIOFILTRATION SYSTEM
THE BIO FILTRATION PONDS
B
B’
SCALE 1:2000 SECTION: CC’ LARGE CROSS SECTION
The section demonstrates the overall green corridor and hydrology system. It is predictable that in the near future, the climate will be more extreme, this requires thinking of an interface between parkland and green infrastructure The hydrology system not only resolve the salinity issue of the duck pond, it also aim to moderate the temperature and seek for more sustainable water management strategy.
ZOOM IN PLAN A
NAME HAOYANG WANG DATE 13 June 2021 CLASS Constructed Ecologies Semester 1/2021, A. Felson
The first detail section area is the terrace filtration area in between each pond, there is a height difference of 3meters between each pond. The soil will be retained by the stone cages and the dimention of each stone cage is 600mmx1000mmx1000mm. The material in the cage can be Basalt which provides best water filtration performance. There is also an elevated timber pathway that encourage people to walk through the wetland.
The area that was selected to explore in detail is the biofiltration zone. From the carpark to the duck pond down below, the ground water will go through three step before it flow into the duck pond. The water treatment plants are distributed across three pond those plants also provide aethetic quality and moderate climatic condition.
LEGEND 1. DUCK POND 2. ROCK CAGE 3. PATHWAY
4. BIOFILTRATION 5. BIOFILTRATION 6. SEDIMENTATION
The second detail section shows the designed waterbank of the duckpond. In the section there is an approximatly 10 meters planting buffer with rich biodiversity. The section shows different zoning of the planting, each vegetation patch offer different conditions for the birds and faunas to inhabit. The area aim to attract birds along the Darebin creek corridor , and potentially lead them through the proposed garden corridor. In this case , the duck pond will function as an important terminal for different species.