Size (mm) |
All inclusive Price ex VAT (£) |
1000 x 650 x 900 |
1050.00
|
1200 x 650 x 900 |
1175.00
|
1500 x 650 x 900 |
1350.00
|
1800 x 650 x 900 |
1550.00 |
2000 x 650 x 900 |
1675.00 |
Choose from our standard finishes or contact us to discuss custom colour options.
The storage volume and retention and subsequent outflow rates will vary with the dimension of the planter to be incorporated into the scheme.
East of Eden SuDS Rain Garden planters are all based on the internal design features as recommended by South East Rivers Trust,
which was founded on extensive trial studies
The SuDS Manual states that typically the surface area of a bioretention feature would be 2-4% of the overall site area being drained, to prevent rapid clogging of the bioretention surface. Based on this guidance, the surface area of any planter (or combination of planters) should not be less than 2-4% of the roof area it is draining. Where possible, the size of the planter should reflect this recommendation.
As such, we offer a range of standard planter sizes to use in 1000mm L x 650mm W x 900mm H to 2000mm L x 650mm W x 900mm H.
These sizes are based on large, but manageable and movable sized units using a fork lift. This offers practical sized unit options to be used in combination to achieve the recommendation catchment areas stated above.
As well as the standard sizes, we can also construct the rain garden planter to bespoke requirements, but recommend a maximum length of 2000mm. For greater catchment we advise to install multiple planters fed by the same drain downpipe connected via the top of the planters.
As mentioned, the storage value will depend on the dimensions of the planters. With a planting layer of 450 mm, this would leave approximately 400 mm for a sub-base water storage layer in our standard 850cm high SuDS Rain Garden planters.
A major advantage of East of Eden SuDS Rain Garden planters is that they have a suspended permeable Draintex geotextile lined floor with Delta dimpled sheet providing a substate layer reservoir of water to sustain the plants during dry periods.
Importantly, this also means that the sub-base layer is completely dedicated to water storage, in contrast to most other designs where the water stored is part of the substrate layers, significantly reducing their water storage capacity.
With a dedicated water only storage area, our rain garden planters are able to hold almost twice as much water, which is critical during a deluge, which will then be released slowly.
The standard rain garden planters are drained via a perforated drainage pipe running along the bottom of the planter. A number of factors influence the drainage rate including the drainage pipe diameter, soil mix and therefore infiltration rate, impact of plants and soil conditions prior to any particular rainfall event will be important.
Based on trial data from South East Rivers Trust narrow diameter (68mm) internal attenuation drainage system is fiited to limit the flow out of the planter to maximise the potential for flood storage, enhanced by the extra water storage provided by the dedicated water storage layer.
One hour after a rainfall event begins, up to 0.75 m3 of water can drain from the bottom of the planter. In reality the infiltration rate of the soil will have a notable impact of the volume and rate of water which can drain out of the bottom of the planter.
Hence the taller the planter the slower the infiltration rate. Also, the larger the overall dimensions of the planter will allow for more storage before the water level reaches the overflow downpipe.
• Made from FSC sourced UK grown Larch – Carbon Neutral
• Internal graduated perforated drainage pipe system for controlled release with sealed storage area to reduce plastic (recycled)components. • Installation above ground to reduce installation energy impact.
• Plus linked directly to drainage system to reduce flash flood impact without being inundated with oil residues, wastes, pesticides etc often released into waterways following storm surges
• Supports permanent aerial plant growth, which in turn:-
o Promotes carbon sequestration,
o Enhances aesthetic value of the site – Promotes wellbeing
o Supports biodiversity, including nectar feeders.
o Constructed in the United Kingdom by UK based craftsmen
Drainage outlet
The drainage outlet from the internal slow release system can be located to suit your specific site requirements. In most situations the outlet is required to feed into the downpipe drain that already exists, which will therefore located directly below the planter. For these projects the outlet feeds through the base of the rain garden SuDS planter, as shown in the figures below
Water may discharge from a planter into the normal drains or it could be diverted further into a Rain Garden.
For an enhance biophilic and aesthetic effect, we like to encourage the construction of landscaped features that the water could travel along and slowly percolate into the soil, such as:
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