Protecting coastlines and oceans: our solutions from land to sea

SUEZ provides local authorities with solutions across the entire water and waste cycle enabling pollution of waterways and oceans to be predicted at a catchment basin level. We have three key goals: to ensure water quality, to aim for zero waste in the ocean, and to protect and revitalise the coastline.
Ensuring water quality

Controlling discharges of wastewater and rainwater into the natural environment

Monitoring sanitation systems continuously and preventing floods

Our Aquadvanced Urban Drainage solution is a software tool to continuously monitor sanitation systems and, in the case of heavy rainfall, prevent the risk of network overflow and pollution in the natural environment. A geographic dashboard enables you to monitor your rainwater and wastewater networks in real time and efficiently manage your sanitation system (network, storage basin) with or without automatic control. This technology is used by smart control centres, which centralise and analyse the data and alerts sent by these systems.

Predicting natural risks in order to manage them more efficiently

Our VISIO smart control centres offer 360° supervision of your water and sanitation services, ensuring better prediction of and response to natural phenomena, such as flooding and network overflow. By using smart technology that offers real-time measurement, you can enhance the performance of your drinking water network. Maintenance and operational performance of facilities are monitored in real time and continuously 24/7. Heavy rainfall is also forecast using meteoroloical data and flow measurement.

Improving rainwater infiltration in urban environments

Smart Pluvial is a service to improve soil permeability at a low cost and with no risk, using alternative techniques to enhance rainwater infiltration (valley gutters, infiltration wells, permeable road surfaces, green roofs, etc.). It has many benefits, including flood protection and limiting rainwater overflow, which in turn protects the natural environment.

Monitoring and predicting marine pollution

Preventing pollution risks

AQUADVANCED® Waterways is a tool enabling efficient real-time hydrological and environmental management for all aquatic environments (lakes, rivers, wet zones, estuaries, coastal water). Our platform centralises data from sensors placed in the natural environment and combines it with weather forecasts to predict hydrometeorological phenomena such as floods, and ensure better control of water quality by modelling pollution dispersion risks. Prior studies of the region’s waterways are therefore necessary. Appropriate equipment (bacteriological sensors, piezometers, etc.) can then be installed accordingly.

Being warned of pollution in real time

SIRENE® is a real-time warning system for aquatic pollution using a measuring station that can be set up on a waterway. It is self-sufficient in energy and fitted with probes that continuously measure a large number of physical and chemical readings: temperature, salinity, dissolved oxygen, turbidity, etc. SIRENE® offers continuous monitoring of surface water quality (waterways etc.) and can raise the alert if there is a sudden drop in quality, identify any associated pollution, and monitor the response of the aquatic environment.

Forecasting pollution and tracking marine waste

The Rivages Pro tech centre in the French Basque Country is our centre of expertise to help local authorities manage aquatic environments (lakes, rivers, estuaries and coastal waters). Its services are based on monitoring, forecasting and recommendation activities, carried out 24/7, and covering multiple skill areas: microbiology, oceanography, hydrology, hydraulics, applied mathematics, data sciences, high resolution modelling, in situ measurements, water and environmental engineering, and ecology. The teams develop and operate solutions concerning water quality, marine waste, coastal risks and marine energies, in collaboration with scientific partners and local authorities.

Our latest technological innovations concern the monitoring of floating waste using videometric and satellite observations and the prediction of their dynamics at sea using the aforementioned technologies. For example, our “Floating Marine Litter Tracking” (FML-TRACK) solution detects and tracks marine waste, ascertaining both its origin and its destination. A specific platform enables local authorities to monitor their beach and sea collection efforts in the long-term.

Tackling pollution at sea

Preventing microplastics and microfibres from reaching the ocean

In association with Nice Côte d’Azur Metropole, the expedition organisation MED, and Villefrance Oceanographic laboratory, we have launched the Microplastics research programme focusing on microplastics in wastewater treatment plants. The programme developed sampling and analysis methods adapted to wastewater to quantify the presence of microplastics and determine the performance of wastewater treatment plants. Results indicate that plants are a barrier to microplastics, reducing them by more than 95% depending on the treatment method used, the most efficient being ultrafiltration.

Tackling micropollutants using the natural anti-pollution capacity of plants

Creating a Dragonfly Zone (“Zone Libellule”) at wastewater treatment plant exits is an effective way of tackling micropollutants. These artificial green spaces reduce the impact of treated wastewater discharge on fresh or salt water. Composed of a set of water basins, each with different local plant and microorganism species chosen for their natural ability to absorb certain pollutants, Dragonfly Zones are inspired by natural wetlands and their impact on water: hydraulic regulation, mechanical filtration, biodiversity, sedimentation, etc.
Aiming for zero waste

Retaining macro-waste

We have a comprehensive approach to retaining macro-waste in rainwater, based primarily on identifying the collection basins that transfer large quantities of macro-waste; using targeted nudges to reduce the amount of litter people drop in the streets; and monitoring drains using sensors that recognise waste levels and identify which drains need clearing as a priority before rainfall is likely to flush away stored-up waste.

Collecting marine waste in ports

We implement automatic collection systems for floating waste in marinas. SEABIN sucks up waste using an electric pump to attract floating waste and hydrocarbons and direct them towards the bin. A natural-fibre bag inside the bin traps the microplastics. The bin can store up to 20 kilograms of waste and is emptied by marina staff when it is full.

Collecting floating macro-waste at sea

Our subsidiary Marinov provides an innovative collection service using “clean sea” boats to collect floating macro-waste in baskets attached to the side of boats and fishing nets. The boats are powered by turbines so they can get close to swimmers without any risk. They can also be fitted with floating dams for use in crisis situations. These boats help to tackle permanent or accidental pollution and limit its environmental impact.

Stepping up plastic collection and recycling

Our Reco® collection points encourage people to collect plastic waste. Located in supermarket car parks, the kiosks reward the ecologically-responsible behaviour of recyclers. In exchange for their plastic bottles and containers, these recyclers receive shopping vouchers. A great way to encourage people to sort their waste!
Restoring the coastline

Restoring the coastline

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Beach nourishment – a “gentle solution” to tackle coastal erosion

We analyse each site (hydro-sedimentary dynamics, uses, biodiversity) to produce a diagnosis and identify sand deposits. We manage the scale and modelling of the nourishment, consultation with stakeholders, environmental studies and authorisation applications, as well as monitoring and managing the environmental aspect of the work.

Maintaining ports and channels on a regular basis

To ensure ports can operate at optimum efficiency, they must be maintained regularly, including being dredged. The same goes for channels, which need to be dredged regularly to make sure water flows properly. We conduct the necessary studies; oversee all cleaning, dredging and waterweed cutting work in ports and channels; transport sediment by land and river; and, finally, recover it.

Restoring marine flora and fauna

Boosting biodiversity in ports

To protect biodiversity in ports, we design nature-based solutions to recreate an ecosystem that enhances its growth. One such innovative solution is ReFISH, which installs bioplastic vegetation to restore juvenile fish habitats. The “nurseries” shelter fish from predators, provide nourishment and enable them to grow before they swim out to sea.

Listening to marine environments to protect their ecosystems

Our Sea@dvancedSound innovation for ocean protection involves listening to underwater sounds. It works by combining collection and analysis of underwater sounds by our Otosea©™ measuring station using an application that provides remote access to the state of the marine environment. Fitted with a series of sensors mounted on a 400-litre marine buoy, the station collects data on weather, water quality, and ocean currents, as well as biological sounds that reflect the quantity and health of local fauna.

Boosting activities and enhancing your region’s appeal

Developing and protecting ports

We can help you develop and protect your marinas and commercial ports. Our bespoke service can include project management, environmental studies, site inspection, and monitoring of natural environments to ensure environmental issues are addressed. We also provide nature-based solutions that bring together biodiversity protection and economic activity. One such example is in Martinique, where by boosting mangrove growth, we have helped protect the coastline from natural disasters and conditions caused by climate change.

Adjusting public services to seasonal peaks

Some towns see their population grow six-fold in peak tourist season. That is why we launched “ON’connect™ tourism”, a decision-making tool to enable you to predict seasonal visitor numbers to your region and optimise your urban public services during peak season. Our platform cross-references water consumption data, collected daily by our smart water meters, with open data (school holidays, weather forecasts, ticket sales, etc.) and uses predictive algorithms to supply local authorities with concrete information to adjust their services (welcoming visitors, work scheduling, waste collection, security, mobility, etc.).

Guaranteeing quality of bathing water for residents

Continuous monitoring and analysis of bathing sites

We propose a molecular biology analysis technique, called GENSPOT®, to help local authorities to manage the bacteriological quality of their bathing sites on a daily basis. This technique provides results in just 3 hours, which is much faster than regulatory methods (24 and 48 hours for culturing). This solution protects swimmers when necessary if water quality is temporarily deteriorated, and allows bathing sites to be reopened as soon as the risk has been eliminated and acceptable sanitary conditions have been restored. This information can be shared immediately with the public via mobile apps on bathing water quality, designed in collaboration with local authorities and used by their departments.

Analysis of a medium remains limited to a specific moment in time, so we compare the results with coastal water quality forecasts for every hour of the day. We also integrate weather forecasts produced by our forecast experts, to provide local authorities with additional information, such as 24/7 weather reports for each beach. These advanced digital solutions (model, real time platform, web portal, etc.) enable the changing quality of coastal waters and environmental resilience to be anticipated. Water quality varies constantly according to the dynamics involved (current, waves, wind, tide, etc.).