Rainwater COLLECTION and CONTROL Underground solutions ep RANGE EXTERNAL DIFFUSION Infiltrate / control flood risks Nidaplast EP product range is used in the construction of SUDS-type (Sustainable Urban Drainage Systems) public or private underground structures with external spreaders, to ensure the collection, storage and outflow of rainwater by regulated or limited flow infiltration and/or evacuation. Self-contained storage modules Honeycomb-block-based Nidaplast EP range storage modules are lightweight. Their large size allows for quick implementation. They do not require any fastening. Offset laying ensures structure stability. Their upper and lower sides are covered with a welded geotextile, thus avoiding fine particle ingress into storage modules. Excellent hydraulic conductivity Combined with one or more external spreading channels between the upstream and downstream manholes, the structure ensures excellent hydraulic conductivity. A hydro-clogging study at Sheffield University (UK) showed that this type of structure, fitted with an external spreader, avoids pollution ingress into blocks. Thus, the macrowaste in rainwater remains trapped in the sedimentation and diffusion channel and does not enter the blocks. Throughout the structure's lifespan, only the external spreaders need to be monitored and cleaned at high pressure, thus greatly facilitating the structure's maintenance, supporting its durability and limiting associated operating costs. STRUCTURE SPECIFICATIONS External spreader Self-contained storage module Spreading channel is monitorable and suitable for high-pressure cleaning Reduced operating costs Speed of Implementation Cost-effective solution Complementary products Nidadrain/Nidatube Drains and corrugated tubes for joining, spreading and/or ventilation. Flow controller. 400 kPa Nidaplast - Solutions Guide Nidaplast - Solutions Guide EP RANGE Underground solutions

Over 30 years of experience! RAINWATER storage and regulation - Underground solutions OPERATION PRINCIPLE ADVANTAGES OF THE EXTERNAL DIFFUSION CHANNEL 3 TYPES OF BASINS TO REGULATE STORMWATER: BETTER CONTROL OF POLLUTION INFILTRATION BASIN A study on hydrocolmatage, conducted at the University of Sheffield (UK), demonstrated that it is possible to prevent the intrusion of pollutants into the blocks by installing a Nidaplast system with an external diffuser channel at the bottom. Thus, the majority of polluting particles (large waste) contained in rainwater are either directly evacuated or retained...

RAINWATER storage and regulation - Underground solutions RAINWATER storage and regulation - Underground solutions ep RANGE OPERATION PRINCIPLE ep RANGE 2 INSTALLATION BED AND GEOTEXTILE 3 WATER SPRADING SYSTEM Geotextile 300g/m² or waterproofing complex Geotextile provides a barrier to prevent soil constituents from entering the structure. In the case of a retention or regulation basin, a waterproofing complex is used to create a waterproof envelope around the structure. Nidaplast alveolar blocks Combined with an external diffuser which functions as a sedimentation channel, Nidaplast blocks are...

RAINWATER storage and regulation - Underground solutions RAINWATER storage and regulation - Underground solutions ep RANGE ADAPTS TO ALL YOUR PROJECTS. ep RANGE ADAPTS TO ALL YOUR PROJECTS. TOWN CENTRE UNDER FAST FOOD RESTAURANT CAR PARK 2,300M3 - SAINT JEAN DE BRAYE INDUSTRIAL AREA Two underground basins, located on either side of an existing collector, were built near a busy road to address flooding issues in this area. As the city had already been impacted by flooding in 2018, the city authorities chose to redevelop the city centre and to construct a rainwater storage basin under the city...

TECHNICAL DATA RAINWATER storage and regulation - Underground solutions TECHNICAL DATA SPECIFICATIONS PACKAGING MATERIAL Polypropylene honeycomb structure - 60% recycled PRODUCT CHARACTERISTICS Colour Black GEOMETRIC CHARACTERISTICS Void fraction 95 % Block weight (block thickness: Minimum dry density Nidaplast EP Cell size Heat-bonded, nonwoven NIDAPLAST / NIDAFLOW BLOCKS COUNT PER PALLET M3 / PALLET PALLET WEIGHT (KG) PACKAGE DIMENSIONS PACKAGING DESCRIPTION 400 500 600 5 PROFILES PLASTIC WRAP PALLET LABEL WOODEN SOLE MECHANICAL CHARACTERISTICS Vertical compression strength short-term (panel...

RAINWATER storage and regulation - Underground solutions RAINWATER storage and regulation - Underground solutions TECHNICAL DATA TECHNICAL DATA NIDAPLAST EP DIMENSIONAL DIAGRAMS NIDAPLAST EP500 PANEL DIMENSIONAL DIAGRAMS Side view Side view Front view Nidaplast EP Front view Nidaplast EP ISO view DIMENSIONAL DRAWINGS NIDAPLAST EPS400 BLOCK NIDAFLOW EP DIMENSIONAL DRAWINGS Front view Side view Side view NIDAPLAST EPS400 PANEL DIMENSIONAL DRAWINGS Nidaflow EP front view Nidaflow EP ISO view Top view Nidaplast - Solutions Guide Nidaplast - Solutions Guide Front view Side view