STORM WATER TREATMENT INTERVENTION
N
PLAN 8
9
10
7
B
6
6
7
8
9
10
1
LOGAN CAIRNS WATER CATCHMENT AND SITE SELECTION
CELL ZONING AND SITE SELECTION
2
A
A
B
Scale 1 : 100
KEY 3
7
6
5
2
4
3
KEY Site Boundary
KEY
Area of Intervention
Direction of Water Flow
Site Boundary
Density Zoning
Water Catchment interacting with Site
Area of Intervention
Cell Zoning of Development
Density Zoning
3
1
2
4
5
6
7
3
1 - Reeds and filtering plants growing below the Boardwalk. This becomes a area for pooling of water. 2 - A 500mm buffer of tall grasses planted along the edge of walkway. This is to breakdown the linear Qualities of the walkway. 3 & 4 - Triangles of planting Working its way along the Boardwalk. Creating diversity within the lower rain garden. Flaxes planted within these areas allowing optimum Filtration. 5 - Band of Smaller Trees and Shrubs. 6 - Band of Larger Tree planting. 7 - Existing Grassland
3
PLAN BREAKDOWN
Reference to figure Below
WATER CATCHMENT AND PLAN CONTEXT
PUBLIC SPACE AND INTEGRATION OPPORTUNITY
SECTION AA 4
5
KEY
KEY
Direction of Water Flow
Point of Intervention Public Green Space
Cell Zoning
Green Corridors
6
Area of run off which interacts with Rain Garden
Board walk
CONTEXT SECTION
Scale 1 : 100
KEY
7
AREA FOR INTERVENTION Band of Larger Trees
Reeds and Flaxes
Band of Shrubs and Lower Lying Trees
Under ground Drain System
Rain Garden Soil Mix
Sand Layer
Mulch/ Pebble/ Rock Layer
Boardwalk 8
STORM WATER DEVICE - RAIN GARDEN
9 12 10
PERSPECTIVE 9
8
8
1
2
3
9
11
4 5 6
7 Water Flow Direction
1- Between the dotted lines shows the constraints of my rain garden. The rain garden will be integrated into the natural valley of the land and will be Integrated within my boardwalk design. 2- This shows the depth of my rain garden. A pooling area of 300mm will be proposed for development incase of heavy rain fall. 3 -A mulch and pebble layer will be installed to help aid filtration. 4 - A layer of Rain garden soil will help with as a filtering agent as well as providing nutrients for plant life. This will be at a depth of 600mm to cope with Flaxes and reeds suggested in this area. 5 - A layer of Sand to further help filter run off. 6 - Under drain system is implemented to allow water which has filtered through the rain garden soil to be pumped out to the storm water networks or Water ways. 7 - Existing Soils of Grade II Quality 8 - Band of Small Trees and Shrubs to help aid filtration before entering the Rain Garden. 9 - Band of Trees which give limited aid to percolation but help support the banks of the valley.
SECTION BB - EXPLODED AXONOMETRIC
Scale 1 : 100
1 - Existing Grassland between the proposed Low Density housing Development and Coastal walkway. 2 - Band of Large Trees planted in this area. This area will give shade to the area as well as keeping structure to the slope of the valley. There will be a greater amount of run off within this area. Kahikatea, Pukatea and Kowhai will be planted. 3 - Band of smaller Trees and Shrubs planted within this zone. Manuka, Kowhai Postrata and Coprosma Robusta would be planted in this zone 4 - Triangles of Flaxes Planted in this zone. Plants such as Toetoe, Banmea, Juncus, Apodasmia, Carex Secta, Lessoniana. 5 - Triangles of Flaxes Planted in this zone. Plants such as Toetoe, Banmea, Juncus, Apodasmia, Carex Secta, Lessoniana. These triangles will create Diversity of planting and continue down the boardwalk. 6 - Large Grasses will buffer the Boardwalk to create a less linear and more organic nature. Grasses like Lessoniana would be good for this buffer. 7 - The Boardwalk is structured in two tiers. The Lowest tier will be 500mm to prevent disturbance to ecologies under the walkway. The Lower tiers act as rest point and a chance to submerse the occupant within the natural environment. The Boardwalk will be constructed from timber. The Timber will blend within the environment around it and not become too much of a focal feature to the surroundings. 8 - A layer of Mulch/ Pebbles and Rock will be added to the ground cover to help aid filtering the soil. 9 - 600mm of Rain Garden Soil will be laid to further the nutrients of the soil for plant life as well as filter storm water run off. 10 - A layer of Sand will also be added to help towards filtration. 11- Under drain system is implemented to allow water which has filtered through the rain garden soil to be pumped out to the storm water networks or Water ways. 12 - Existing Soil at a Grade II Level. This soil will not be developed