Stormwater and runoff management

Almadius, a design office specializing in hydrology and hydraulics, carries out analyzes and sizing of work for the management of rainwater and runoff .

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Manage the impact of your project to preserve the water cycle

The construction, transformation or renovation of buildings and infrastructure can waterproof soils and interfere with the water cycle . These modifications have significant consequences : flooding, pollution of waterways, saturation of sanitation networks, etc.

It is therefore essential to find adequate and nature-friendly solutions to manage rainwater and runoff in order to limit the impacts of your project on the environment and infrastructure.

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Rainwater management: the key to your planning permit

To obtain planning or environmental permits for your project, it is recommended to provide a study which proves that you comply with regional regulations on stormwater and runoff management.

As part of your permit request, Almadius is responsible for carrying out the rainwater and runoff management study , with concrete solutions adapted to the conditions of the project (residential, commercial or industrial) and outlet solutions as well as , if necessary, water recovery .

When possible, we favor an approach involving nature-based solutions , involving soils, vegetation and the natural water cycle and providing multiple benefits, such as biodiversity, landscaping, the fight against urban heat islands, recreational aspects, etc.

Obtain your BREEAM certification

BREEAM certification assesses the environmental performance of buildings and infrastructure based on several criteria, including water management. To obtain this label, we carry out an assessment to assess your eligibility for this certification based on this criterion.

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Our stormwater and runoff management services

Data analysis

We analyze the impact of your project on rainwater and runoff. To do this, we select the project rainfall, calculate the quantity of waters rainwater (flows and volumes), we carry out tests infiltration in situ and calculate the speed infiltration .

Sizing of works

Depending on the results, we justify the outlet adapted to the situation and size the works which will make it possible to best manage rainwater and runoff, while respecting the legal obligations in force and the environment . We work from upstream to downstream : limitation of waterproofing (choice of types of coating), transport of collected water, infiltration and retention works and consideration of discharge. Above all, we favor water management on the plot , as close as possible to where the water falls.

We take into account the risks linked to the stability of buildings and, if necessary, size the structures also with the aim of treating runoff water to avoid pollution of the receiving environment and ensure the sustainability of the retention and infiltration structures.

Recovery of rainwater and runoff

In certain large-scale projects, it is possible to promote rainwater collected and stored in order to reuse it for domestic or industrial purposes. Our partner Naturem Solutions will find a solution adapted to your needs.

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What are Almadius’ strengths?

Varied experience

We have extensive experience on site , whether in Brussels or Wallonia. This knowledge of the terrain allows us to offer appropriate solutions to the specificities of the terrain, while respecting the regulations in force in the region .

Practical solutions

Pragmatic, we go further than the study and analysis of the situation. We offer practical, concrete and lasting solutions for effective management of rainwater and runoff.

Multidisciplinarity

The strength of Almadius lies in the multidisciplinarity of its teams. We are able to offer technical solutions in several areas . Thus, we take care of different aspects of your project, which reduces the number of participants and simplifies your procedures .

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FAQ: Stormwater and runoff management

What is stormwater and runoff?

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Stormwater and runoff are rainwater once it has hit roofs or the surface of the ground .

How should rainwater and runoff be disposed of?

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Rainwater and runoff must be managed while respecting a hierarchy of outlets . They must first be infiltrated into the ground. If this is not possible, they will be redirected towards an artificial flow path or into a watercourse . Finally, as a last resort, they will be evacuated into the drainage network .

What are the benefits of effective stormwater and runoff management?

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Effective stormwater and runoff management helps prevent flooding , reduces water pollution , limits erosion of soil , improves the quality of surface and groundwater and avoids saturation of sanitation networks . It also helps recharge aquifers and maintain healthy aquatic ecosystems .

Is it mandatory to integrate rainwater management solutions into my project?

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In many regions, such as Wallonia and Brussels , town planning standards require that construction projects integrate rainwater and runoff management solutions in order to prevent any negative impact on the environment and infrastructure.

What is a rainwater retention basin?

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Water retention systems, such as retention basins, allow rainwater to be collected and permanently stored . These waters are then slowly released or infiltrated into the natural environment.

Interested in our stormwater and runoff management services?

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