Stormwater retention and regulation
We design custom stormwater retention and regulation systems for your construction or development projects.
Design and sizing of stormwater retention and regulation systems
Stormwater retention and regulation consist of holding rainwater in tanks during heavy rainfall and releasing it back into the networks at a controlled flow rate.
Thanks to our 18 years of experience in rainwater harvesting, we are able to offer rainwater retention and regulation solutions that are perfectly suited to each customer's specific needs.
This expertise allows us to design custom systems, integrating the technical constraints of each project while guaranteeing performance, reliability and regulatory compliance.
AGELYO offers systems with no volume limit, for the hydraulic management of stormwater, designed to optimise the regulation of runoff flows and prevent hydrological overload and flooding.
Our rainwater retention and regulation tanks are essential wherever planning departments impose requirements on stormwater management.
They can combine harvesting and retention of rainwater: they collect rainwater and release it to the network at a regulated flow rate, while keeping a volume of rainwater for personal use in the garden and home.
Our technical solutions for stormwater regulation
We offer a complete range of tanks for rainwater retention and regulation , available in gravity-fed or non-gravity-fed versions (with a regulation or pumping system) that temporarily store stormwater before its controlled discharge.
To encourage natural infiltration, we also install tunnels and infiltration crates, designed to optimise the ground footprint while ensuring effective drainage.
All our solutions are modular, durable and compliant with current standards.
Gravity-fed rainwater retention and flow-control tank
Underground gravity-fed retention tank that temporarily stores stormwater before its regulated discharge by simple gravity, without the use of a pumping system.
No limit on storage volume.
Non-gravity rainwater retention tank with pump-based flow regulation
Non-gravity-fed underground retention tank with discharge via a pumping system.
This solution ensures a controlled discharge that meets regulatory requirements.
No limit on storage volume.
Rainwater management system using an infiltration tunnel
Modular underground system allowing stormwater to infiltrate directly into the ground. The infiltration tunnels offer large storage capacity and an optimised infiltration volume, while requiring little ground footprint.
Stormwater regulation system using infiltration crates
The infiltration crates (or cages) are stackable underground structures designed to allow temporary storage and infiltration of stormwater into the ground. Infiltration crates are the ideal solution for small surfaces.
Rainwater infiltration or regulated flow?
What do the regulations say?
Regulations require priority to be given to infiltrating stormwater collected from the building's impermeable surfaces (roofs, car parks, concrete paths, etc.). Whether infiltration is possible is determined by the nature of the soil.
If the soil permeability is sufficient and there is no shallow water table within the project footprint, infiltration is possible. The stormwater management system will then be sized taking this infiltration into account.
If the soil does not allow infiltration of rainwater, the discharge of collected water goes into the stormwater network (underground pipes in urban areas, open ditches in less urbanised areas). However, this discharge cannot take place at the same flow rate as natural rainfall, as this would risk saturating the networks, causing overflows or damage. Therefore, installing a flow-regulated retention tank will limit and regulate the discharge flow.
The regulatory framework for stormwater management
More and more municipalities and communities of municipalities are paying attention to what happens to roof and car park water.
Regulations require that, from the project design stage, provision be made to infiltrate this water as much as possible, to store and regulate the flow of excess water. It is then necessary to include a flow-regulated retention tank in the building permit, development permit or works declaration.
Do you have a project?
AGELYO responds to all stormwater regulation and retention requests anywhere in:
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France and in Europe,
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the Maghreb (Mauritania, Tunisia, Algeria, Morocco),
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West and Central Africa (Benin, Burkina Faso, Côte d’Ivoire, Guinea, Mali, Niger, Senegal, Togo, Cameroon, Congo, Gabon, Chad),
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East Africa (Kenya, Uganda, Rwanda, Tanzania, Burundi),
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Indian Ocean (Madagascar, Mauritius),
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in the overseas territories (DOM-TOM) (French Guiana, Mayotte, Réunion).