ROOF GARDEN DRAINAGE AND AQUADRAIN

ROOF GARDEN DRAINAGE AND AQUADRAIN COMPONENTS

AquaDrain 25

25mm plate, 95% voidEcosand

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

ROOF GARDEN DRAINAGE AND AQUADRAIN 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

- plate and number of

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

ROOF GARDEN DRAINAGE AND AQUADRAIN 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

ROOF GARDEN DRAINAGE AND AQUADRAIN 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

ROOF GARDEN DRAINAGE AND AQUADRAIN 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.

CAR PARK DRAINAGE AND ROAD DRAINAGE SYSTEMS

POROUS PAVING SYSTEMS AND AQUADRAIN 50

POROUS PAVING SYSTEMS AND AQUADRAIN 50ATTENUATION AND INFILTRATION

AquaDrain 50

Attenuation

AquaDrain 50

Infiltration

POROUS PAVING SYSTEMS AND AQUADRAIN 50COMPONENTS

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 225FFFilter Fabric

Geotex 300PPProtection Fleece

AquaDrain 50

50mm plate, 96% void

POROUS PAVING SYSTEMS AND AQUADRAIN 50SAVING COST AND IMPROVING FLOW RATES

POROUS PAVING SYSTEMS AND AQUADRAIN 50SAVING COST AND IMPROVING FLOW RATES

POROUS PAVING SYSTEMS AND AQUADRAIN 50SAVING 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 of AquaDrain 50 means;

❑ 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.

COMBINED SURFACE AND CHANNEL SYSTEMSROADSIDE DRAINAGE

COMBINED SURFACE AND CHANNEL SYSTEMSCOMPONENTS

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

COMBINED SURFACE AND CHANNEL SYSTEMSROADSIDE 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

COMBINED SURFACE AND CHANNEL SYSTEMSLARGER 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

COMBINED SURFACE AND CHANNEL SYSTEMSADVANTAGES

❑ 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.

SURFACE DRAINAGE AND

ROADSIDE SWALE SYSTEMS

POROUS PAVING SYSTEMS AND PLUPAVE

TURF AND GRAVEL DRAINAGE CELL

COMBINED SURFACE AND CHANNEL SYSTEMS

COMBISWALES

POROUS PAVING SYSTEMS AND PLUPAVETURF AND GRAVEL DRAINAGE

❑ Reduces surface temperature

❑ Reduces surface runoff

❑ No surface drains required

❑ Easy installation

❑ Rigid Clipping System

❑ Cost effectiveDemarkation squares

Provide ground marking in place traditional painted

ground layouts

COMBINED COMBISWALE SYSTEMSDESCRPTION

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 pollutants. Beneath, a sub-surface channel helps transport water to a

designated outlet. In doing so, CombiSwales optimise the natural cleansing process whilst also providing surface and sub-surface void space.

COMBINED COMBISWALE SYSTEMSBENEATH 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

COMBINED COMBISWALE SYSTEMSTYPICAL INSTALLATION

CASE STUDY

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

Zero discharge from site

FILTER PITS AND FLOW CONTROLFOR USE WITH ESS WATER MANAGEMENT SYSTEMS

ESS Filter Pit

Water Filtration

AquaBrake Chamber

Flow Control

FILTER PITS AND FLOW CONTROL AQUABRAKESHOW 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 outlet which creates a significant opposition to flow through the device.

FILTER PITS AND FLOW CONTROL AQUABRAKES CHAMBERSKEY 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 overflow pipe

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.

SUSTAINABLE DEVELOPMENT – THE SOLUTION TO URBAN FLOODING

VersaVoid

Modular Tank System

Modular Tank Systems

For Infiltration/Attenuation

Rainwater Harvesting

Recycling System using Pluvial/ VersaVoidPluvial Cube

Modular Tank System

WATER COLLECTION AND STORAGE SYSTEMS

STRUCTURAL COMPLIANCE

❑ Images extracted from CIRIA C737

❑Show problems of buckling when using perforated pipes

❑ESS removes the need for pipes

CIRIA C737

DESIGN AND INSTALLATIONS NATIONALLY AND INTERNATIONALLY

❑ 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.

For more information please visit our website

www.alderburgh.com

THANK YOU

ENVIRONMENTAL SUSTAINABLE SOLUTION LTD