SDS

 
 
Sector Transport infrastructure
Project type Refurbishment
Services provided Planning advice
Design
Product / system supply
Year completed 2016
Project location London
Client London Luton Airport Operations Limited
Consultant Mott MacDonald
Contractor Whitemountain
Products used SDS GEOlight® attenuation tanks, Aqua-Swirl™ separator and flow controls
 
 

Challenge

In September 2014, London Luton Airport Operations Limited (LLAOL) commissioned Veolia Water Projects Ltd to develop a surface water management strategy for the airport. The strategy was to address the prerequisites to achieve planning consent for the airport’s further expansion.

Data collected from water quality monitoring conducted between 2005 and 2012 had identified the main pollution risks as oil spills and de-icing chemicals.

Any contaminated surface water would flow to a number of water receptors: the Luton Hoo Lake and the River Lea, to which UK/EU Environmental Quality Standards have been applied, and an underlying Principal Chalk aquifer, which is monitored against UK Drinking Water Standards for Groundwater.

Phase 1 of the new development programme included the resurfacing and expansion of car parking areas, extensions to buildings and the construction of a new dual carriageway.

The main impact of this first phase of development was the increased risk of flooding caused by multiple new impermeable areas. This was in addition to a known flooding problem that already existed on Airport Way, which provides main access to and from the airport.

Therefore, the new drainage scheme was to protect habitat and amenity by improving water quality but also prevent the increased risk of flooding.

Solution

In late April 2016, SDS installed a new SuDS system to handle surface water runoff from Luton Airport’s extended medium-term car park.

The system includes five SDS GEOlight® attenuation tanks that have a combined storage capacity of up to 4,277m3 of water. Upstream, two SDS Aqua-Swirl™ hydrodynamic vortex separators remove approx. 90 to 95% of the total pollutants in the surface water runoff volume.

Sufficient capacity exists within the underground storage facility landside to accommodate excess airside surface water runoff, the first flush of which will be highly contaminated with substances, such as de-icing chemicals and will be diverted to the Thames Water foul system for treatment.

The system has been designed to series 500 of the specification for highways works and sewers for adoption. It follows engineering consultancy Mott MacDonald’s flood risk design for a 1:100 year storm event, including an allowance for an additional 20% due to climate change.

Surface water drainage is managed in accordance with the ‘Design Manual for Roads and Bridges’ (‘DMRB’), the ‘Manual of Contract Documents for Highways Works’ (‘MCHW’) and ‘Sewers for Adoption Seventh Edition’.

Outcome

As well as providing the site with essential control over water quality, the choice of SDS Aqua-Swirl™ was of particular benefit to infrastructure drainage contractor Whitemountain.

Site Engineer at Whitemountain, Brian Fegan, explains: “The installation of a system comprising a device of concrete construction, until now our only option, would have required the use of a 350 tonne crane and most likely, due to the massive inconvenience not just to us but to the airport and local road network, would not have been feasible at all. The Aqua-SwirlTM’s versatility meant that we could design the devices for the specific requirements of this site, without the need for any bends in piping, whilst their inherent strength allowed us to save on time and cost through not requiring a concrete surround. Their compact size and small footprint, together with the lifting supports and straps provided, meant installation was very quick and simple and final placement could be done manually; we needed only a single day in which to dig, position, connect up and back fill”.

An additional benefit of the SuDS system has been the reduction, to a great extent, in the frequency and volume of the flooding that occurred in the neighbouring Airport Way underpass.

Whilst the flooding hazard for both carriageways continues to remain categorised as ‘significant’ for a 1 in 100 year storm event, the severity of flooding across the access route in a 30 year event has been reduced to the category of ‘moderate’ for one carriageway whilst, for a 1 in 10 year event, the second carriageway is deemed entirely clear.

Furthermore, for all return periods, the hazard remains in place for a maximum of only 2 hours, thereby significantly reducing the duration of restricted access, whilst the installation of a pump, which is able to transfer flows to the SDS GEOlight® tanks, ensures that emergency access can still be gained at all times.


Challenge

In September 2014, London Luton Airport Operations Limited (LLAOL) commissioned Veolia Water Projects Ltd to develop a surface water management strategy for the airport. The strategy was to address the prerequisites to achieve planning consent for the airport’s further expansion.

Data collected from water quality monitoring conducted between 2005 and 2012 had identified the main pollution risks as oil spills and de-icing chemicals.

Any contaminated surface water would flow to a number of water receptors: the Luton Hoo Lake and the River Lea, to which UK/EU Environmental Quality Standards have been applied, and an underlying Principal Chalk aquifer, which is monitored against UK Drinking Water Standards for Groundwater.

Phase 1 of the new development programme included the resurfacing and expansion of car parking areas, extensions to buildings and the construction of a new dual carriageway.

The main impact of this first phase of development was the increased risk of flooding caused by multiple new impermeable areas. This was in addition to a known flooding problem that already existed on Airport Way, which provides main access to and from the airport.

Therefore, the new drainage scheme was to protect habitat and amenity by improving water quality but also prevent the increased risk of flooding.

Solution

In late April 2016, SDS installed a new SuDS system to handle surface water runoff from Luton Airport’s extended medium-term car park.

The system includes five SDS GEOlight® attenuation tanks that have a combined storage capacity of up to 4,277m3 of water. Upstream, two SDS Aqua-Swirl™ hydrodynamic vortex separators remove approx. 90 to 95% of the total pollutants in the surface water runoff volume.

Sufficient capacity exists within the underground storage facility landside to accommodate excess airside surface water runoff, the first flush of which will be highly contaminated with substances, such as de-icing chemicals and will be diverted to the Thames Water foul system for treatment.

The system has been designed to series 500 of the specification for highways works and sewers for adoption. It follows engineering consultancy Mott MacDonald’s flood risk design for a 1:100 year storm event, including an allowance for an additional 20% due to climate change.

Surface water drainage is managed in accordance with the ‘Design Manual for Roads and Bridges’ (‘DMRB’), the ‘Manual of Contract Documents for Highways Works’ (‘MCHW’) and ‘Sewers for Adoption Seventh Edition’.

Outcome

As well as providing the site with essential control over water quality, the choice of SDS Aqua-Swirl™ was of particular benefit to infrastructure drainage contractor Whitemountain.

Site Engineer at Whitemountain, Brian Fegan, explains: “The installation of a system comprising a device of concrete construction, until now our only option, would have required the use of a 350 tonne crane and most likely, due to the massive inconvenience not just to us but to the airport and local road network, would not have been feasible at all. The Aqua-SwirlTM’s versatility meant that we could design the devices for the specific requirements of this site, without the need for any bends in piping, whilst their inherent strength allowed us to save on time and cost through not requiring a concrete surround. Their compact size and small footprint, together with the lifting supports and straps provided, meant installation was very quick and simple and final placement could be done manually; we needed only a single day in which to dig, position, connect up and back fill”.

An additional benefit of the SuDS system has been the reduction, to a great extent, in the frequency and volume of the flooding that occurred in the neighbouring Airport Way underpass.

Whilst the flooding hazard for both carriageways continues to remain categorised as ‘significant’ for a 1 in 100 year storm event, the severity of flooding across the access route in a 30 year event has been reduced to the category of ‘moderate’ for one carriageway whilst, for a 1 in 10 year event, the second carriageway is deemed entirely clear.

Furthermore, for all return periods, the hazard remains in place for a maximum of only 2 hours, thereby significantly reducing the duration of restricted access, whilst the installation of a pump, which is able to transfer flows to the SDS GEOlight® tanks, ensures that emergency access can still be gained at all times.


Interested in this case study?
Call 01934 751303
OR
 
 
 
Downloads
  • SDS Surface Water Run-Off - Pollution Treatment Solutions
    SDS Surface Water Run-Off - Pollution Treatment Solutions
    2pp 1.38MB
    Download
  • SDS Case study: Luton Airport
    SDS Case study: Luton Airport
    350.12KB
    Download
  • SDS Case study: Luton Airport
    SDS Case study: Luton Airport
    350.12KB
    Download
  • SDS Case study: Luton Airport
    SDS Case study: Luton Airport
    350.12KB
    Download
  • SDS Case study: Luton Airport
    SDS Case study: Luton Airport
    350.12KB
    Download
 
 
 
Enquire
 


Related entries

  • SDS: SDS Vortex Flow Control for stormwater management system
    SDS Vortex Flow Control for stormwater management system
    SDS
    The SDS Vortex Flow Control is used to control the rate at which water is released from a stormwater storage system to downstream drainage systems. It is a self-activating device which controls the rate of water release by...
  • SDS: SDS Surface Water Management
    SDS Surface Water Management
    SDS
    SDS specialises in engineering innovative and cost-effective turnkey surface water management systems. SDS’s integrated water management system ensures that surface water run-off can be collected, treated, stored and...
  • SDS: SDS Aqua-Swirl™ Hydrodynamic Stormwater Separator
    SDS Aqua-Swirl™ Hydrodynamic Stormwater Separator
    SDS
    Aqua-Swirl™ is a hydrodynamic separator used in water management systems to capture pollutants, such as oil and debris, within surface water runoff. It can effectively eliminate more than 80% of total suspended solids.
  • SDS: SDS GEOlight® Modular Underground Stormwater Storage
    SDS GEOlight® Modular Underground Stormwater Storage
    SDS
    GEOlight® stormwater management units are suitable for use in sustainable drainage systems (SuDS) for stormwater attenuation or soakaway infiltration. The units are PVC modular honeycomb structures with high capacity, high...
Not found what you're looking for? View other options

SDS

Ask SDS about

Stormwater management system for Luton Airport expansion