Solutions · Flagship Division

Stormwater Management & Sustainable Urban Drainage Systems

NGS is Saudi Arabia's leading SuDS supplier. We design, supply, and train installation teams for geo-cellular soakaway, attenuation, passive irrigation, and root space systems — engineered for the Kingdom's specific climate and ground conditions.

100,000+ m³Largest SuDS Project KSA
Since 2022First AquaCell in Saudi Arabia
NEOM · ROSHN · KSP · Qiddiya · Diriyah · RCUMega-Projects Served
What is SuDS?

Capture the water. Recharge the ground. Re-think the drain.

Sustainable Urban Drainage Systems (SuDS) are engineered infrastructure that capture, store, and release stormwater the way the natural ground would — preventing flooding, recharging aquifers, and supporting irrigation. In Saudi Arabia, where annual rainfall can fall in a few sudden events, SuDS turns a flood-risk problem into a water-resource opportunity.

NGS supplies the geo-cellular tanks, geomembranes, geotextiles, and drainage cells that make SuDS work — engineered for 50-year design life under Saudi ground conditions.

BS EN 1610 Compliant CIRIA C753 Reference 50-Year Design Life 75% Lower Carbon
Four functions of SuDS

One system. Four engineering purposes.

NGS SuDS installations deliver one or more of these functions depending on site hydrology, design intent, and project requirements.

01

Soakaway / Infiltration

Captures stormwater at source and allows it to infiltrate back into the ground, recharging groundwater and removing flood risk. The dominant SuDS function for residential, commercial, and master-planned districts.

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Soakaway / Infiltration
02

Attenuation

Holds stormwater temporarily and releases it slowly at a controlled outflow rate. Used where infiltration is restricted by ground conditions or downstream networks need flow management.

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Attenuation
03

Passive Irrigation

Routes captured stormwater into the root zones of trees, parks, and landscape features — reducing irrigation demand and supporting green infrastructure across master-planned districts.

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Passive Irrigation
04

Root Space & Tree Pits

Geo-cellular structures beneath paving create engineered root volume for urban trees — protecting trees from compaction while enabling stormwater storage at the same time.

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Root Space & Tree Pits
Case Study · NEOM Construction Villages

Saudi Arabia's first modular SuDS installation

NGS designed and supplied 50,000 m³ of AquaCell 1050 for soakaway and infiltration at a NEOM construction village — moving the client away from open ponds with a value-engineered modular system, alongside consultant ECG and contractor Al Fanar.

50,000
Managed below ground
1st
AquaCell in KSA
NEOM
Flagship client
Case Study · Al-Badaa Biosolids Facility, NEOM

SuDS for NEOM's first biosolids treatment facility

NGS delivered 10,000 m³ of AquaCell stormwater infiltration and attenuation at the Al-Badaa Biosolids Treatment Facility (2025) — a sustainable, low-maintenance alternative to concrete drainage, installed and inspected under the NEOM ETSD Quality Team alongside Bechtel, EEG, and Lantania.

10,000
Managed below ground
2025
Year delivered
Class A
Facility supported
Bechtel
PM consultant
Case Study · Royal Commission for AlUla HQ

Passive irrigation & stormwater on a single podium

Across a 47,126 m² catchment, NGS combined AquaCell 200 attenuation (sized for a 1-in-100-year storm) with an AquaCell 150 capillary passive-irrigation raft and GDRAIN 30 — recycling captured rainfall into the root zone over occupied basements, with Buro Happold, Hopkins Architects, and CCC.

47,126
Catchment managed
1-in-100
Storm design (yr)
Passive
Capillary irrigation
2026
Year delivered
Product Range

The complete SuDS product line.

NGS supplies the full range of components needed to deliver a complete SuDS installation — from the geo-cellular tank itself through the geotextiles, geomembranes, and accessories.

GC

AquaCell

Modular geo-cellular crates for soakaway and attenuation. High void ratio for maximum storage volume. Heavy-load rating suitable for trafficked applications. The system used at NEOM.

GC

AquaCell Core/Plus/Lite

Range of geo-cellular options for varying load and depth requirements — from light-duty landscape applications to deep heavy-trafficked installations.

GT

Drainage Geotextile

Non-woven needle-punched geotextile wrap for SuDS tanks. Filtration and separation function. Specified to BS EN 13252 drainage application standards.

GM

Impermeable Geomembrane

HDPE or LLDPE liner for attenuation tanks (where infiltration is not required). Welded watertight enclosure with QC testing on site.

DC

Drainage Cell / Geocomposite

Cuspated drainage layers for podium, green roof, and shallow SuDS applications. High flow capacity with low profile depth.

FT

Pre-Treatment & Catchpit

Sediment filtration and pre-treatment systems upstream of the SuDS tank — protecting void capacity and extending design life.

Two AquaCell families

Choose the right AquaCell for your project.

Every NGS AquaCell system shares a 95%+ void ratio and a 50-year design life. The range splits into two families — pick by volume and function.

Geo-Cellular

AquaCell Geo-Cellular

High-capacity modular storage for infiltration & attenuation.

  • Best forLarge-volume storage & soakaway
  • FunctionsInfiltration · Attenuation
  • Range30 / 45 / 60 ton load classes · 500 mm cells
  • Typical useCar parks, highways, large tanks, deep soakaways
  • StandardsCIRIA C737 · BS 7533-13 · ISO 9001/14001/45001
Premium
EXO

AquaCell EXO

Premium high-load cells that store, soak — and irrigate.

  • Best forPremium sites needing all-in-one versatility
  • FunctionsInfiltration · Attenuation · Passive Irrigation
  • Range85 / 150 / 200 / 250 mm precision depths
  • Typical useLandscaped & public realm, podiums, sub-surface irrigation
  • StandardsBS 7533-13:2009 · CIRIA · 50-year design life

Not sure which to specify? Design either family in minutes — and get a stamped-ready report.

Open the Design Studio
Applications

Where NGS SuDS systems are installed.

Master-planned districts

Residential & mixed-use developments

SuDS is increasingly mandated for master-planned districts across Saudi Arabia — both as a flood mitigation requirement and a sustainability commitment. NGS works with developers and consultants from concept through installation.

  • Subsurface attenuation beneath car parks and roads
  • Soakaway zones distributed across the site
  • Tree-pit and root space systems in landscaped areas
  • Permeable paving integration where applicable
Aerial view of a master-planned district with integrated SuDS — retention ponds, swales, and green infrastructure
Highway & infrastructure

Roads, parking, and transport infrastructure

Highway authorities and PMCs use SuDS attenuation systems to handle storm peak flows that exceed conventional pipe capacity — protecting downstream urban areas from flooding.

  • Highway median attenuation systems
  • Car park subsurface infiltration
  • Service road and lay-by drainage
  • Bus depot and logistics yard stormwater
Highway interchange with SuDS attenuation ponds, channels, and transport infrastructure
Industrial & commercial

Warehouses, malls, and commercial facilities

Large-footprint industrial and commercial facilities benefit from SuDS through reduced surface water discharge fees, lower flood risk, and sustainability credit contributions (LEED, Mostadam).

  • Warehouse and distribution centre attenuation
  • Mall and retail centre infiltration zones
  • Loading dock and yard stormwater
  • Industrial site runoff containment
Aerial view of warehouses, malls, and commercial facilities with SuDS retention and green areas
Why NGS for SuDS

Beyond supply — engineering, design, and installation support.

01

Hydraulic design support

Our engineering team reviews site catchment, design rainfall events, and outflow requirements — designing the SuDS volume correctly for your specific project.

02

Value engineering

We often deliver projects originally specified for conventional pond storage as more efficient geo-cellular systems — saving footprint, time, and cost while improving performance.

03

Installation training

At NEOM, our team trained the installation crew on AquaCell handling, placement, and geotextile wrap procedures. The same support is available for every project.

04

Saudi stock

Critical SuDS components held in Riyadh stock — enabling fast mobilisation for tight construction programmes.

05

50-year design life

Every component selected for minimum 50-year buried design life under typical Saudi ground conditions. Chemically inert, UV protected during installation.

06

Tier-1 pre-approval

Pre-approved supplier with Bechtel, Parsons, Jacobs, AECOM, AtkinsRéalis, WSP, and other major PMCs — accelerating consultant approval cycles.

FAQ

Frequently asked questions

What is a Sustainable Urban Drainage System (SuDS)?

A SuDS is engineered infrastructure that captures, stores, and releases stormwater the way natural ground would — preventing flooding, recharging aquifers, and supporting irrigation. NGS supplies the geo-cellular tanks, geomembranes, geotextiles, and drainage cells that make SuDS work in Saudi Arabia.

What is AquaCell and how does it work?

AquaCell is a modular geo-cellular crate system installed below ground for stormwater soakaway, infiltration, and attenuation. Its high void ratio stores large volumes of water in a compact footprint, and its lightweight, load-rated structure installs quickly in both trafficked and non-trafficked areas. NGS delivered the first AquaCell installation in Saudi Arabia at NEOM.

What are the four functions of SuDS?

SuDS installations deliver one or more of four functions: soakaway/infiltration (returning water to the ground), attenuation (controlled release of stored water), passive irrigation (feeding water to plant root zones), and root space (engineered tree-pit volume beneath paving).

Who supplies SuDS and AquaCell systems in Saudi Arabia?

Nasra GeoSyn (NGS) is Saudi Arabia's leading SuDS supplier, having engineered over 250,000 m³ of SuDS for projects including NEOM, the Royal Commission for AlUla, and the Al-Badaa Biosolids Facility. NGS provides design support, supply, installation supervision, and training, backed by ISO 9001, 14001, and 45001 certification.

Let's talk specs

Have a project in mind?

Share your site conditions, design life targets, and project timeline. Our engineering team will respond with the right specification within one business day.

Talk to NGS