ROOF GARDEN DRAINAGE AND AQUADRAIN ROOF GARDEN DRAINAGE AND - - PowerPoint PPT Presentation
ROOF GARDEN DRAINAGE AND AQUADRAIN ROOF GARDEN DRAINAGE AND AQUADRAIN COMPONENTS AquaDrain 25 Ecosand 25mm plate, 95% void Cover materials are an essential part of the infiltration process. Ecosand is biologically engineered to provide
AquaDrain 25 25mm plate, 95% void Ecosand Cover materials are an essential part of the infiltration process. Ecosand is biologically engineered to provide maximum permeability through optimum physical, chemical and biological characteristics. AquaDrain 50 50mm plate, 96% void
DESIGN FOR ALL ROOF STRUCTURES Lightweight Garden
Over metal roof awning
Lightweight Garden
With minimum soil depth
Garden
With minimum soil depth 1. Permeable soil mix 2. Geotex 225 Filter Fabric 3. AquaDrain 25/50
layers dependant on drainage requirements. 4. Tuflex waterproof membrane 5. Reinforced concrete slab to be designed as per engineers details and loading requirements of roof garden water outlet
ADVANTAGES OF THE ROOF GARDEN
❑ Environmental ❑ Storm water run-off management ❑ Absorbs CO2 ❑ Reduces urban heat island effects ❑ Reduces need for heating/ventilation systems – year round energy efficiency ❑ Modifies urban micro-climates ❑ Provides diverse habitats ❑ Retains and manages rainwater ❑ Purifies air and water ❑ Provides economic benefits ❑ Energy efficiency year-round ❑ Air and water purification
ADVANTAGES OF USING AQUADRAIN
❑ Reduces required soil depths and the associated loading requirements needed to support the soils ❑ No aggregate taxes where used to replace stone layers ❑ Reduced transport costs due to lightweight module with high void ratio (more for less) ❑ High void ratio allows water to infiltrate the roof garden quicker, creating a more efficient roof garden design ❑ Helps capture some water to prevent soils drying out during periods of dry weather
CASE STUDY - GCHQ Project: Government Communications Headquarters Client: GCHQ Location: Cheltenham Date of Installation: 2000 Type of System: Landscaped garden above underground area Infor: An enclosed and secure landscaped garden located in the centre of the doughnut. It is for the use of the workers and is an effort to encourage inter-departmental staff interaction.
AquaDrain 50
Attenuation
AquaDrain 50
Infiltration
Tuflex
Waterproof Membrane
❑ Tuflex and 300PP for use when water is being directed to a specified destination ❑ Geotex 225FF to be used when water is allowed to soakaway into the surrounding ground Geotex 225FF
Filter Fabric
Geotex 300PP
Protection Fleece
AquaDrain 50
50mm plate, 96% void
SAVING COST AND IMPROVING FLOW RATES
SAVING COST AND IMPROVING FLOW RATES
SAVING COST ALL ROUND
THE GIVEN EXAMPLE IS TAKEN FROM A 250m2 CAR PARK WITH POROUS PAVING AND REQUIREMENT FOR A 66l/m2 STORAGE CAPACITY AND CAN BE FOUND IN FULL IN OUR AQUADRAIN 50 BROCHURE
Reductions in cost of stone are not the only savings. Although AquaDrain 50 is more expensive, the associated costs offset the extra initial cost: ❑ A 72% reduction in stone quantity from the use
❑ Up to 95% cost reductions for transport (due to weigh and size restrictions of transporting stone) ❑ 75% reduction in aggregate levy’s ❑ And finally a 30% reduction in dig volume and the associated labour and job cost.
ROADSIDE DRAINAGE
COMPONENTS
25mm plate, 95% void 50mm plate, 96% void Pluvial Cube Modular, 96% void VersaVoid Modular tan, 96% void
Tuflex Waterproof Membrane Ecosand Ecological soil Geotex 225FF Filter Fabric Geotex 300PP Protection Fleece
ROADSIDE DRAINAGE WITH GULLY POT
❑ More traditional collection, but water released into Pluvial Cube Soakaway ❑ Pluvial Cube wrapped in permeable Geotex 225FF and surrounded with suitable filter media such as ESS EcoSand
LARGER ROAD DRAINAGE SCHEMES
CONCRETE SLAB ROAD GEOTEX 300PP TUFLEX IMPERMEABLE GEOMEMBRANE ESS ECOSAND FILTER MEDIUM GEOTEX 225FF PERMEABLE GEOTEXTILE ESS PLUVIAL CUBE MODULES
❑ For use with both porous and non-porous road surfaces ❑ Combination of AquaDrain 50 and Pluvial Cube creates storage channels and storage volume ❑ Geotex 225 lining around outside edges of Pluvial creates and infiltration/soakaway, whilst Tuflex lining everywhere else allows for water channelling – even from the centre of the road
ADVANTAGES ❑ Removes need for storm drains ❑ Percolation of rainwater into the soil ❑ Aquifer recharge ❑ Soil erosion reduction ❑ Relieves pressures on sewer systems Most Importantly: ESS roadside drainage removes the need for expensive road maintenance needed to repair damage caused by flooding.
TURF AND GRAVEL DRAINAGE CELL
COMBISWALES
TURF AND GRAVEL DRAINAGE
❑ Reduces surface temperature ❑ Reduces surface runoff ❑ No surface drains required ❑ Easy installation ❑ Rigid Clipping System ❑ Cost effective
Demarkation squares Provide ground marking in place traditional painted ground layouts
DESCRPTION CombiSwales, or Combined Bioswales, are combined surface and sub-surface systems, providing optimum conditions to both prevent flooding and purify stormwater. ❑ Attenuation or infiltration ❑ Can be used to transport water, or just to filter and purify it before allowing to re-enter the natural water system
At the surface, the grassed cover is non-invasive and helps to break down
designated outlet. In doing so, CombiSwales optimise the natural cleansing process whilst also providing surface and sub-surface void space.
BENEATH THE SURFACE
❑ Water is further filtered through geotextile cover ❑ Water enters Pluvial Cube and is directed to either a specified outlet or soaks away into the surrounding ground
TYPICAL INSTALLATION
Project: North Earlham Fire Station Client: Norfolk County Council Location: Norfolk Installation Date: 2015 Type of System: Rainwater Harvesting/Swale Size: RWH Tank – 23 m³ Swale – 52 m³ Depth of Cover: 300 -500 mm
FOR USE WITH ESS WATER MANAGEMENT SYSTEMS
ESS Filter Pit
Water Filtration
AquaBrake Chamber
Flow Control
HOW THEY WORK
During low flows, the Aquabrake behaves like a traditional opening and water passes through at a normal rate. As the chamber fills, the Aquabrake is submerged and a rotational velocity established. This causes an air-cored vortex to form in the
flow through the device.
KEY SYSTEM RESPONSES
A Low Flow During low flows, water passes through the AquaBrake in a traditional manner. B High Flow During high flows, the AquaBrake is submerged and an air-cored vortex is formed. C Blockage The integral vertical
prevents flooding and water bypasses the AquaBrake. D Drain-Down The chamber can be completely drained down via the manual bypass door and fitted pull wire.
VersaVoid
Modular Tank System
Modular Tank Systems
For Infiltration/Attenuation
Rainwater Harvesting
Recycling System using Pluvial/ VersaVoid Pluvial Cube
Modular Tank System
STRUCTURAL COMPLIANCE ❑Images extracted from CIRIA C737 ❑Show problems of buckling when using perforated pipes ❑ESS removes the need for pipes CIRIA C737
❑ Barwa City Project, Qatar ❑ Motor City Project, Dubai ❑ City of Arabia, Dubai ❑ Burj Hotel, Dubai ❑ Pam Island Atlantis Hotel, Dubai ❑ The palm Grandeur, Dubai ❑ 7 Towers Project, Dubai ❑ Al Barari Development, Dubai
ESS’ outstanding reputation extends beyond the UK. As well as working across the country, we have had lots of experience working within the Middle East.