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Les eaux côtières, surveillées entre les prélèvements.

Les eaux de baignade sont analysées quelques fois par saison pour les bactéries, mais la pollution après les orages, le manque d’oxygène et les efflorescences d’algues vont et viennent entre deux prélèvements. Des sondes sur les plages et dans les estuaires surveillent en continu et prévoient quand l’eau risque d’être dangereuse, pour que les autorités préviennent les baigneurs et ferment à temps les zones conchylicoles.

Industrie

Océans

Mesures

5

Sources citées

4

1. Océans · Qualité des eaux côtières et de baignade

   Between the samples

   Bathing waters are sampled for bacteria a few times a season, and results arrive days later. Sewer overflows after heavy rain, low oxygen and algal blooms come and go between samples. Continuous sensing and a prediction model let authorities act while bathers and shellfish are still at risk.

2. Ce qui est mesuré

   Water, rain and rivers

   Sondes at beaches and estuaries measure temperature, salinity, turbidity, dissolved oxygen and chlorophyll every ten minutes. Rain and river gauges in the catchment measure the inflow that carries pollution, and laboratory samples follow the monitoring calendar and every alert. Each reading carries its time and its quality flags.

   Instruments

   Multi-parameter sondes · Rain gauges · River gauges · Laboratory samples

3. Le nœud de base

   A prediction for every beach

   The node runs the short-term pollution model from rainfall, river flow and turbidity, flags low oxygen and algal signals, and publishes a daily prediction for each bathing water, so advice reaches the public before laboratory results do. Nothing is lost when a link drops; the node keeps it.

4. Radio et liaisons

   From the pier to the public

   Sondes on piers and buoys near shore reach a gateway over a low-power link, and the node sends data and predictions over cellular. Predictions appear on beach signs and websites, and alerts reach farms and the authority at once. Each link is chosen for the place, not from a catalogue.

   Liaisons

   LoRaWAN · Réseau mobile public

5. Comment ça marche

   From a storm to a beach advisory

   A summer thunderstorm drops heavy rain on the catchment. River flow and turbidity at the estuary rise, and the model predicts a short pollution event at two beaches. Advisories go up that morning; samples taken that day confirm it, and the beaches reopen two days later.

6. De la commande à l’exploitation · Commande

   Scope the waters

   The scope reads the authority’s bathing waters, shellfish zones, pollution sources and sample history. Nexus Observatory Inc. returns the sonde and gauge plan, the prediction model approach, public information and a price per site and per year. Every assumption in the scope is written down and priced.

   Planifier un déploiement

7. De la commande à l’exploitation · Relevé

   Survey beaches and outfalls

   Crews survey beaches, estuaries and outfalls with the authority: sonde positions, piers and buoy moorings, catchment gauges and gateway coverage. Pollution sources are mapped from the bathing water profiles. Every finding is kept with the site record for the crews who follow.

8. De la commande à l’exploitation · Autorisations

   Consents and public notice

   Maritime and harbour consents are obtained for buoys and piers, land owners approve gauges, and public information at beaches explains the monitoring. Every approval is kept with the site record. Approvals are tracked site by site, so nothing waits unseen.

9. De la commande à l’exploitation · Fabrication

   Build and calibrate

   Sondes are calibrated against standards, antifouling fitted, radios paired, gauges tested, and the gateway and node configured and enrolled with their identities. The kit runs together before shipping. Test results travel with the kit to the site. Nothing ships until the whole kit has passed its tests together.

   Ouvrir le configurateur de stations

10. De la commande à l’exploitation · Installation

    Install sondes and gauges

    Crews fix sondes on piers and buoys, install rain and river gauges in the catchment, mount the gateway and node, and connect power and backhaul. Every point is photographed and recorded. The site record is updated before the crew leaves.

11. De la commande à l’exploitation · Mise en service

    Mettre en service par rapport aux prélèvements

    Chaque nœud prouve son identité. Sonde readings are compared with laboratory samples, oxygen with a reference meter, and the prediction model is checked against a season of past samples before predictions are published. Results are signed and kept with the site record.

12. De la commande à l’exploitation · Exploitation

    Predict and warn

    Authorities see water quality live and a daily prediction for each beach. After heavy rain, bathers are advised against swimming before samples confirm it, low oxygen alerts warn fish farms, and algal signals trigger shellfish testing. Reports for owners and funders come from the same record.

13. De la commande à l’exploitation · Maintenance

    Clean, calibrate, validate

    Sondes are cleaned of fouling and recalibrated on the agreed plan, predictions are validated against every sample, models retrained each season, and software updated in rings. Every change is kept with the site record. Spares and procedures travel with the crews.

    Réserver des services sur le terrain

14. Produits de données

    For bathers, farms and authorities

    The public and beach managers receive daily bathing water predictions; fish and shellfish farmers receive low oxygen and algal alerts; environment and health authorities receive water quality records; water utilities and regulators receive pollution event reports, each tied to site and time.

    Voir les produits de données

15. Preuves

    Managed to the directive

    Bathing waters are managed under the bathing water directive and the recreational water guidelines, oxygen data pass the real-time quality checks, and rain is measured to the instrument guide. Every prediction is validated against samples and kept with its inputs.

    Référentiels

    Directive 2006/7/EC · WHO guidelines on recreational water quality · Manual for Real-Time Quality Control of Dissolved Oxygen Observations · WMO-No. 8

16. Ce que vous obtenez

    Observation de l’océan et des côtes

    Bouées mouillées, flotteurs profileurs, marégraphes et houlographes, radar côtier et réception AIS, avec des flux contrôlés pour la qualité. Fourni sous forme de service géré et licence de données, pour ports, coastal agencies, offshore energy, fisheries. Scale: Coastline to basin. Service levels are written as numbers you can measure on your own dashboard.

    Parler aux ventes

17. Étape suivante

    Planifier avec nous : qualité des eaux côtières et de baignade

    Tell us the site, the measurements and the rules it answers to. We reply with a survey proposal, a design and a scope for coastal and bathing water quality. An engineer replies with a survey proposal and a scope, and the plan grows from one site to the network you need, at your pace.

    Planifier un déploiementOuvrir le configurateur de stationsOuvrir le Studio

01Le lieu et ses dangers

Où il fonctionne, et ce qui peut mal tourner.

Operating contextBathing waters are classified and managed under the bathing water directive, recreational water guidance sets the health framework, and dissolved oxygen and other ocean data are quality-controlled to real-time manuals. Short-term pollution after heavy rain is common and predictable from rainfall and river flows.

Dangers

• Sewer overflows after heavy rain
• Low oxygen that kills fish
• Harmful algal blooms that poison shellfish
• Samples that arrive after the bathers have gone
• Sondes fouled within weeks

02Ce qu’il faut mesurer

Quoi, où, à quelle fréquence, et selon quelles règles.

Chaque mesure indique où elle est prise, à quelle fréquence, et la norme ou la réglementation publique qui la fonde. Les numéros de la colonne des sources ouvrent la source citée plus bas.

03La pile d’observation

D’un module de base à un réseau.

Les mêmes briques à chaque échelle : des instruments et un nœud de base, un site avec sa radio, une flotte exploitée comme un tout, et un réseau fédéré sur le protocole ouvert.

1. 01

   Unité de base

   A point: a multi-parameter sonde on a buoy or pier with a low-power radio.

   Build a station →
2. 02

   Site

   A site: sondes at the beach and estuary, rain and river gauges, a gateway and node.

   Plan a site →
3. 03

   Parc

   Every bathing water and shellfish zone of an authority on one view.

   Managed offers →
4. 04

   Réseau

   Authorities share water quality and predictions with the public and health agencies through open standards.

   The open protocol →

• 01Sonde de qualité de l’eau
• 02Bouée ancrée
• 03Station météo compacte
• 04Limnimètre
• 05Terminal LPWAN
• 06Passerelle LoRaWAN
• 07Micronœud (Nano)
• 08Modem/routeur cellulaire
• 09Champ solaire

Radio et liaisons

LoRaWAN

Sondes on piers and buoys near shore reach a gateway over a low-power link.

Radio et liaisons

Réseau mobile public

The node sends data and predictions over cellular.

Edge computeThe node runs the short-term pollution model from rainfall, river flow and turbidity, flags low oxygen and algal signals, and publishes a daily prediction for each bathing water.

PowerSondes and buoys run on batteries and small solar panels; the gateway and node run on mains at a harbour office or on solar.

04Comment ça marche

De l’instrument au produit.

Le parcours d’une observation, niveau par niveau, avec l’interface de chaque liaison et une nomenclature en dessous ; puis comment ce nœud devient un site, une flotte et des réseaux fédérés.

05De la commande à l’exploitation

Chaque étape, du premier appel à un site en service.

La même équipe et le même dossier portent le travail, du cadrage à la maintenance.

1. 01 Order

   Scope the waters

   The scope reads the authority’s bathing waters, shellfish zones, pollution sources and sample history. Nexus Observatory Inc. returns the sonde and gauge plan, the prediction model approach, public information and a price per site and per year. Every assumption in the scope is written down and priced. 1

2. 02 Survey

   Survey beaches and outfalls

   Crews survey beaches, estuaries and outfalls with the authority: sonde positions, piers and buoy moorings, catchment gauges and gateway coverage. Pollution sources are mapped from the bathing water profiles. Every finding is kept with the site record for the crews who follow. 1

3. 03 Permits

   Consents and public notice

   Maritime and harbour consents are obtained for buoys and piers, land owners approve gauges, and public information at beaches explains the monitoring. Every approval is kept with the site record. Approvals are tracked site by site, so nothing waits unseen.

4. 04 Build

   Build and calibrate

   Sondes are calibrated against standards, antifouling fitted, radios paired, gauges tested, and the gateway and node configured and enrolled with their identities. The kit runs together before shipping. Test results travel with the kit to the site. Nothing ships until the whole kit has passed its tests together. 3

5. 05 Install

   Install sondes and gauges

   Crews fix sondes on piers and buoys, install rain and river gauges in the catchment, mount the gateway and node, and connect power and backhaul. Every point is photographed and recorded. The site record is updated before the crew leaves.

6. 06 Commission

   Mettre en service par rapport aux prélèvements

   Chaque nœud prouve son identité. Sonde readings are compared with laboratory samples, oxygen with a reference meter, and the prediction model is checked against a season of past samples before predictions are published. Results are signed and kept with the site record. 13

7. 07 Operate

   Predict and warn

   Authorities see water quality live and a daily prediction for each beach. After heavy rain, bathers are advised against swimming before samples confirm it, low oxygen alerts warn fish farms, and algal signals trigger shellfish testing. Reports for owners and funders come from the same record. 2

8. 08 Maintain

   Clean, calibrate, validate

   Sondes are cleaned of fouling and recalibrated on the agreed plan, predictions are validated against every sample, models retrained each season, and software updated in rings. Every change is kept with the site record. Spares and procedures travel with the crews.

06Produits de données et intégration

Ce qu’il fournit, à qui, et dans quels systèmes.

Produits de données

• Daily bathing water predictionsThe public and beach managers
• Low oxygen and algal alertsFish and shellfish farmers
• Water quality recordsEnvironment and health authorities
• Pollution event reportsWater utilities and regulators

Intégration

• Information du publicPredictions appear on beach signs and websites.
• SamplingAlerts schedule extra samples.
• UtilitiesOverflow events link to the utility’s records.

Exchanged through OGC SensorThings API, netCDF-CF, MQTT.

07Questions des acheteurs

Avant de cadrer votre projet.

Does it replace bacteria samples?

No. Samples classify the water; sensing predicts between them.

How is pollution predicted?

From rainfall, river flow and turbidity, checked against past samples.

What about fouling?

Antifouling and cleaning on schedule keep sondes honest.

Can farms use it?

Yes, for oxygen and algal alerts.

08Ressources

Les sources de cette page.

Normes, réglementations et lignes directrices publiques, citées là où elles s’appliquent. Chacune ne s’applique que dans sa juridiction ou son champ.

1. 1Directive 2006/7/EC concerning the management of bathing water qualityEuropean Union · 2006
2. 2WHO guidelines on recreational water quality, Volume 1: coastal and fresh watersWorld Health Organization · 2021
3. 3Manual for Real-Time Quality Control of Dissolved Oxygen Observations (QARTOD)U.S. Integrated Ocean Observing System
4. 4WMO-No. 8: Guide to Instruments and Methods of ObservationWorld Meteorological Organization

09Voir aussi

Cas d’usage et solutions.

10Océans : domaines spécialisés

Les autres domaines de cette industrie.

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