Download - Australia; Sustainable Gardens Rain Gardens - Rain Gardens Australia

8/3/2019 Australia; Sustainable Gardens Rain Gardens - Rain Gardens Australia

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Rain Gardens Australia Pty Ltd 2010

Sustainable Gardens

Rain Gardens

Madeline Laurenson & Pat Arundell


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What is a Rain Garden

Why have a Rain Garden

How does a Rain Garden work

Design

Retrofit Case Study

Questions

What Well Cover Tonight


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A Rain Garden is

Sustainable Low maintenance

Green

Good for environment Water Sensitive Urban Design

Small Scale

Make a difference (at home)


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Part of Stormwater System downpipes,driveways

Part of Landscaping

Can be big 30m2 or moreCan be small 1 to 2 m2

Simplest form of Water Sensitive Urban Design(WSUD)

Treats Stormwater

What is a Rain Garden


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Why

DiagramCourtesy ofMelbourne Water


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Whats so bad about stormwater?

Chemicals ie oil, grease

Nutrients ie fertilisers

Physical contaminants

Microbial pathogens (dog poo etc)Storm impacts

Aesthetic contaminants


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Typical Gross Pollutants in UrbanStormwater

Man made materials egPolystyrene, tennis balls, plastic bags, drink

cans, newspapers, plastic bottles, litter,cigarette butts, syringes etc...

Vegetative MaterialLeaves, grass clippings, seeds, etc...

Sediment

Fine and coarse with attachedhydrocarbons, heavy metals and nutrients

30

60

10

Typical*Percentageby weight


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Not a Typical Aesthetic

Contaminant


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Why Do It Why a Rain Garden

Why do it? Why a Rain Garden?

Protect natural systemsRemoval of N, P, fine

sediment, not rapid disposal

Integrated landscaping Water efficient landscaping

Protect water qualityRemoval of N, P, fine

sediment

Reduce runoff and peak flows

Detention of stormwater, not

rapid disposal

Add capital value Minimal development costs


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How Does a Rain Garden Work


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I Want One What Now?

Where is the water coming from

Location

Proximity to buildings

Reactive soils

New development or retrofit


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I Want One What Now?

Garden size / location

Plant selection

Soil characteristics / mulch Depth (ponding & detentiontime)

Aggi pipe size Overflow


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Design

What works Get design early

What doesnt leaving design as addon

Caution retrofits


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retrofit pictures(tips for the unwary)


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Rain Gardens

because

Gardens that clean are green

www.raingardens.com.au

[email protected]
http://www.raingardens.com.au/http://www.raingardens.com.au/mailto:[email protected]:[email protected]://www.raingardens.com.au/

Download - Australia; Sustainable Gardens Rain Gardens - Rain Gardens Australia

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