Contact ADS UK on 0203 442 0607 or click here
Contact ADS UK on 0203 442 0607 or click here
The ADS Arcadia hi flow Hydrodynamic Separator (HDS) offers proven sediment removal efficiencies at higher flow rates and in smaller footprints. Arcadia is one of the highest performing HDS available and is equally proficient at:
Most HDS work on the principle of a free vortex (similar to water flowing through a plughole). ADS Arcadia operates on the principal of water travelling through a series of angled baffles which trap pollutants and reduce turbulence, helping to prevent the resuspension of captured contaminants. Tests demonstrate that Arcadia is more effective than conventional vortex separators.
With a long‑standing emphasis on water quantity, sediment management is one of the most mis-understood areas of SuDS. Common errors include placing treatment devices in the wrong part of the SuDS train, failing to provide bypasses once maximum treatment flow is exceeded, or neglecting sediment management entirely; issues that can compromise hydraulic performance and water quality.
Both vegetative and proprietary SuDS require effective sediment control, as per CIRIA C753 The SuDS Manual, to account for storage loss from sediment deposition and ecological harm when sediments reach receiving waters. Settlement devices are widely used but can fill quickly and allow remobilisation of sediment during high flows.
Arcadia – as a first-line defence within a SuDS treatment train – can help remove sediment and the attached pollutants, safeguarding performance and protecting the environment.
The importance of sediment management is covered in the April 2026 edition of New Civil Engineer, Click here to view
Arcadia, like all stormwater management assets, must do more than safeguard water quality and provide storage capacity. Long-term performance, safety, and compliance are critical to ensure systems remain fit for purpose years after installation. For manufacturers, full compliance with the relevant standard(s) is essential, and all product claims must be supported by credible, independent audits that are transparent in detailing the full scope of the assessment.
Arcadia has independently verified Mitigation Indices (MIs) and is suitable for Low Pollution Hazard applications without the need for additional treatment. For higher Pollution Hazard applications, Arcadia can be used as a first stage in a treatment train comprising other SuDS components.
To download the Arcadia Mitigation Indices datasheet, click here. This includes details of how Arcadia’s independently verified Mitigation Indices prove its effectiveness and help to manage pollution risk and safeguard the environment.
| POLLUTANT | ARCADIA HDS MI | DESIGN CHECK | CIRA C753 TABLE 26.2 |
|---|---|---|---|
|
TTS |
0.6 |
LOW POLLUTION HAZARD INDEX |
0.5 |
|
METALS |
0.4 |
LOW POLLUTION HAZARD INDEX |
0.4 |
|
HYDROCARBONS |
0.5 |
LOW POLLUTION HAZARD INDEX |
0.4 |
Low Pollution Hazard applications include residential car parks, low traffic roads (e.g. cul-de-sacs, general access roads) and non-residential car parking with infrequent change (e.g. schools, offices) i.e. < 300 traffic movements per day.
Arcadia requires precast concrete chambers designed to BS 5911-3:2022 and BS EN 1917:2002
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